S6226-PD-MMO-010 Revision 1

TECHNICAL MANUAL

OPERATION AND MAINTENANCE MANUAL WITH ILLUSTRATED PARTS BREAKDOWN

ORGANIZATIONAL LEVEL

SELF-CONTAINED BREATHING APPARATUS BREATHING AIR CHARGING SYSTEM (SCBA BACS)

0910-LP-103-6441

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.

PUBLISHED BY DIRECTION OF THE COMMANDER, NAVAL SEA SYSTEMS COMMAND

0 9 1 0 L P 1 0 3 6 4 4 1

S6226-PD-MMO-010 Revision 1

TECHNICAL MANUAL

OPERATION AND MAINTENANCE MANUAL WITH ILLUSTRATED PARTS BREAKDOWN

ORGANIZATIONAL LEVEL

SELF-CONTAINED BREATHING APPARATUS BREATHING AIR CHARGING SYSTEM (SCBA BACS)

0910-LP-103-6441

DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.

PUBLISHED BY DIRECTION OF THE COMMANDER, NAVAL SEA SYSTEMS COMMAND

28 AUGUST 2004

S6226-PD-MMO-010

INSERT LATEST CHANGE PAGES. DESTROY SUPERCEDED PAGES.

LIST OF EFFECTIVE PAGES

A Revision 1

NOTE: The portion of the text affected by the changes is indicated

by a vertical line in the outer margins of the page. Changes to illustrations are indicated by miniature pointing hands.

Dates of issue for original and changed pages are: Original .........0 ...................12 January 1998 Revision ........1 ....................28 August 2004

TOTAL NUMBER OF PAGES IN THIS PUBLICATION IS 121, CONSISTING OF THE FOLLOWING:

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TABLE OF CONTENTS

Section Page

LIST OF ILLUSTRATIONS ............................................................................................................................iv LIST OF TABLES ..............................................................................................................................................v FOREWORD.....................................................................................................................................................vii ABBREVIATIONS AND ACRONYMS..........................................................................................................ix SAFETY SUMMARY .......................................................................................................................................xi CHAPTER 1 INTRODUCTION AND SAFETY PRECAUTIONS.......................................................... 1-1

1.1 INTRODUCTION........................................................................................................................... 1-1 1.1.1 Purpose ................................................................................................................................ 1-1 1.1.2 Scope ................................................................................................................................... 1-1

1.2 SYSTEM DESCRIPTION .............................................................................................................. 1-1 1.3 SPECIFICATIONS ......................................................................................................................... 1-2 1.4 SAFETY PRECAUTIONS.............................................................................................................. 1-3

1.4.1 Standard Safety Precautions ................................................................................................ 1-4 1.4.2 General Safety Instructions ................................................................................................. 1-4 1.4.3 Warnings, Cautions, And Notes .......................................................................................... 1-4 1.4.4 Special Precautions.............................................................................................................. 1-4

1.5 EQUIPMENT AND ACCESSORIES SUPPLIED ......................................................................... 1-4 1.6 REFERENCE PUBLICATIONS NOT SUPPLIED........................................................................ 1-5 1.7 EQUIPMENT ACCEPTANCE....................................................................................................... 1-6

1.7.1 Inventory ............................................................................................................................. 1-6 1.7.2 Maintenance Verification .................................................................................................... 1-6 1.7.3 Inspection ............................................................................................................................ 1-6

1.8 INITIAL OPERATIONAL TEST................................................................................................... 1-6 1.9 STORAGE REQUIREMENTS....................................................................................................... 1-6

CHAPTER 2 OPERATION.......................................................................................................................... 2-1 2.1 INTRODUCTION........................................................................................................................... 2-1 2.2 CONTROLS AND INDICATORS ................................................................................................. 2-1 2.3 OPERATING PROCEDURES........................................................................................................ 2-6

2.3.1 Setup.................................................................................................................................... 2-6 2.3.2 Operation ............................................................................................................................. 2-7 2.3.3 Disassembly....................................................................................................................... 2-10 2.3.4 Emergency Operation........................................................................................................ 2-10

CHAPTER 3 FUNCTIONAL DESCRIPTION ........................................................................................... 3-1 3.1 INTRODUCTION........................................................................................................................... 3-1 3.2 DESCRIPTION ............................................................................................................................... 3-2

3.2.1 ABPA .................................................................................................................................. 3-2 3.2.1.1 Drive Air Inlet Pressure Gauge (AHP G201) ........................................................ 3-2 3.2.1.2 Drive Air Regulator (AHP-V201).......................................................................... 3-2 3.2.1.3 Regulated Air Pressure Gauge (ALP-G202).......................................................... 3-2

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TABLE OF CONTENTS (Continued)

Section Page

3.2.1.4 Drive Air Filter .......................................................................................................3-2 3.2.1.5 Drive Air Relief Valve (ALP-V202) ......................................................................3-2 3.2.1.6 Drive Air Bleed Valve (ALP-V204).......................................................................3-2 3.2.1.7 Drive Air Control Valve (ALP-V203)....................................................................3-2 3.2.1.8 Filtered Air Inlet Pressure Gauge (AHP-G204)......................................................3-3 3.2.1.9 Filtered Air Inlet Valve (AHP-V206) .....................................................................3-3 3.2.1.10 Booster Pump........................................................................................................3-3 3.2.1.11 Surge Tank............................................................................................................3-4 3.2.1.12 Filtered Air Relief Valve (AHP-V207).................................................................3-4 3.2.1.13 Pilot Switch (AHP-V205).....................................................................................3-4 3.2.1.14 In-Line Filter.........................................................................................................3-4 3.2.1.15 Filtered Air Outlet Pressure Gauge (AHP-G203) .................................................3-4

3.2.2 HPFA....................................................................................................................................3-4 3.2.2.1 Coalescor Filter.......................................................................................................3-4 3.2.2.2 Relief Valve (AHP-V304) ......................................................................................3-4 3.2.2.3 Check Valve (AHP-V303)......................................................................................3-4 3.2.2.4 Cartridge Holders....................................................................................................3-4 3.2.2.5 Manifold .................................................................................................................3-4 3.2.2.6 H2O/CO Indicator ...................................................................................................3-4 3.2.2.7 HPFA Indicator (AHP-G301) .................................................................................3-4 3.2.2.8 In-Line Filters .........................................................................................................3-4 3.2.2.9 Shutoff Valve (AHP-V301) ....................................................................................3-4 3.2.2.10 Bleed Valve (AHP-V302).....................................................................................3-5 3.2.2.11 Drain Valve (AHP-V305).....................................................................................3-5

3.2.3 Connecting Hose Assemblies...............................................................................................3-5 3.2.3.1 Drive Air Hose Assembly.......................................................................................3-6 3.2.3.2 Filtered Air Hose Assembly ...................................................................................3-6 3.2.3.3 Filtered Air Supply Hose Assembly .......................................................................3-6 3.2.3.4 Quick-Charge Wand ...............................................................................................3-6

CHAPTER 4 SCHEDULED MAINTENANCE ..........................................................................................4-1 4.1 INTRODUCTION............................................................................................................................4-1 4.2 SCOPE .............................................................................................................................................4-1 4.3 SAFETY REQUIREMENTS ...........................................................................................................4-1 4.4 MAINTENANCE CONCEPT .........................................................................................................4-1

4.4.1 Scheduled Maintenance........................................................................................................4-1 4.4.2 Unscheduled Maintenance ...................................................................................................4-2

4.5 PLANNED MAINTENANCE SYSTEM ........................................................................................4-2

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TABLE OF CONTENTS

Section Page

4.6 UNITED STATES NAVY MAINTENANCE AND MATERIAL MANAGEMENT SYSTEM

COVERAGE AND PROBLEM REPORTING .............................................................................. 4-2 4.7 GENERAL MAINTENANCE INSTRUCTIONS .......................................................................... 4-3

4.7.1 Equipment Disassembly and Parts Replacement................................................................. 4-3 4.7.1.1 Bagging Components............................................................................................. 4-3

4.7.2 General Cleaning Procedure................................................................................................ 4-4 4.7.3 Leak Detection .................................................................................................................... 4-4 4.7.4 Anti-seize Tape.................................................................................................................... 4-4 4.7.5 Lubricants............................................................................................................................ 4-4 4.7.6 O-Rings ............................................................................................................................... 4-4

4.7.6.1 O-Ring Removal .................................................................................................... 4-4 4.7.6.2 O-Ring Installation................................................................................................. 4-4

CHAPTER 5 TROUBLESHOOTING......................................................................................................... 5-1 5.1 INTRODUCTION........................................................................................................................... 5-1 5.2 GENERAL TROUBLESHOOTING INSTRUCTIONS................................................................. 5-1

CHAPTER 6 CORRECTIVE MAINTENANCE ....................................................................................... 6-1 6.1 INTRODUCTION........................................................................................................................... 6-1

6.1.1 Scope ................................................................................................................................... 6-1 6.1.2 Safety Requirements............................................................................................................ 6-1

6.2 GENERAL MAINTENANCE INFORMATION ........................................................................... 6-1 6.2.1 Maintenance Parts ............................................................................................................... 6-2 6.2.2 Related Maintenance ........................................................................................................... 6-2

6.3 TEST EQUIPMENT AND TOOLS................................................................................................ 6-2 6.4 MATERIALS REQUIRED ............................................................................................................. 6-3 6.5 GENERAL MAINTENANCE PROCEDURES ............................................................................. 6-3

6.5.1 System Tightness Test......................................................................................................... 6-3 6.5.1.1 ABPA Tightness Test ............................................................................................ 6-3 6.5.1.2 HPFA Tightness Test ............................................................................................. 6-4

6.6 ABPA CORRECTIVE MAINTENANCE ...................................................................................... 6-5 6.6.1 Booster Pump Removal and Installation ............................................................................. 6-5 6.6.2 Drive Air Regulator (AHP-V201) Removal and Installation.............................................. 6-9 6.6.3 Drive Air Relief Valve (ALP-V202) Removal and Installation........................................ 6-13 6.6.4 Drive Air Control Valve (ALP-V203) Removal and Installation ..................................... 6-15 6.6.5 Drive Air Bleed Valve (ALP-V204) Removal and Installation ........................................ 6-17 6.6.6 Pilot Switch (AHP-V205) Removal and Installation ........................................................ 6-19 6.6.7 Filtered Air Inlet Valve (AHP-V206) Removal and Installation....................................... 6-21 6.6.8 Surge Tank and Filtered Air Relief Valve (AHP-V207) Removal and Installation.......... 6-24

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TABLE OF CONTENTS

Section Page

6.6.9 Drive Air Inlet Pressure Gauge (AHP-G201), Regulated Air Pressure Gauge (AHP-G202),

and Filtered Air Inlet Pressure Gauge (AHP-G204) Removal and Installation.................6-26 6.6.10 Filtered Air Outlet Pressure Gauge (AHP-G203) Removal and Installation ...................6-28 6.6.11 Drive Air Filter Removal and Installation........................................................................6-30 6.6.12 In-Line Filter Removal and Installation ...........................................................................6-31 6.6.13 Spooler Valve Assembly Removal and Installation.........................................................6-32

6.7 HPFA Corrective Maintenance ......................................................................................................6-36 6.7.1 Bleeding HPFA ..................................................................................................................6-37 6.7.2 Filter Removal and Installation ..........................................................................................6-37 6.7.3 Shut Off Valve (AHP-V301) Removal and Installation.....................................................6-38 6.7.4 Check Valve (AHP-V303) Removal and Installation ........................................................6-40 6.7.5 Drain Valve (AHP-V305) Removal and Installation .........................................................6-41

CHAPTER 7 ILLUSTRATED PARTS BREAKDOWN ............................................................................7-1 7.1 INTRODUCTION............................................................................................................................7-1 7.2 PARTS LISTS AND ILLUSTRATIONS ........................................................................................7-1 7.3 LIST OF MANUFACTURERS .......................................................................................................7-1

APPENDIX A OPERATIONAL CHECKLISTS .......................................................................................A-1 A-1 INTRODUCTION..........................................................................................................................A-1 A-2 CHECKLISTS PROVIDED ..........................................................................................................A-1

LIST OF ILLUSTRATIONS

Figure Page

1-1 SCBA BACS ............................................................................................................................... 1-2 2-1 Air Booster Pump Assembly (ABPA) Controls and Indicators .................................................. 2-2 2-2 High-Pressure Filter Assembly (HPFA) Controls and Indicators ............................................... 2-3 2-3 Filtered Air Supply Hose Assembly (H-103) Controls and Indicators........................................ 2-4 2-4 Inlet/Outlet Connection Points..................................................................................................... 2-5 3-1 SCBA BACS Functional Schematic and Flow Diagram............................................................. 3-1 3-2 Air Booster Pump Assembly (ABPA)......................................................................................... 3-3 3-3 High Pressure Filter Assembly (HPFA) ...................................................................................... 3-5 6-1 Booster Pump............................................................................................................................... 6-8 6-2 Drive Air Regulator (AHP-V201) ............................................................................................. 6-10 6-3 Drive Air Relief Valve (ALP-V202) ......................................................................................... 6-14 6-4 Drive Air Control Valve (ALP-V203)....................................................................................... 6-15 6-5 Drive Air Bleed Valve (ALP-V204).......................................................................................... 6-18 6-6 Pilot Switch (AHP-V205).......................................................................................................... 6-19 6-7 Filtered Air Inlet Valve (AHP-V206)........................................................................................ 6-22

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LIST OF ILLUSTRATIONS (Continued)

Figure Page

6-8 Surge Tank with Filtered Air Relief Valve (AHP-V207).......................................................... 6-25 6-9 Drive Air Inlet Gauge (AHP-G201), Regulated Air Pressure Gauge (ALP-G202), and Filtered

Air Inlet Pressure Gauge (AHP-G204) ..................................................................................... 6-27 6-10 Filtered Air Outlet Pressure Gauge (AHP-G203).................................................................... 6-29 6-11 Drive Air Filter ........................................................................................................................ 6-30 6-12 In-Line Filter............................................................................................................................ 6-32 6-13 Tube Assembly ........................................................................................................................ 6-33 6-14 Banjo Fitting Hex Nut ............................................................................................................. 6-34 6-15 Spooler Valve Assembly ......................................................................................................... 6-34 6-16 Spooler Valve Installation and Removal Tool ........................................................................ 6-35 6-17 Spooler Valve Sleeve............................................................................................................... 6-35 6-18 Filter......................................................................................................................................... 6-38 6-19 Shutoff Valve (AHP-V301)..................................................................................................... 6-39 6-20 Check Valve (AHP-V303)....................................................................................................... 6-41 6-21 Drain Valve (AHP-V305)........................................................................................................ 6-42 7-1 ABPA (Sheet 1 of 4)..................................................................................................................... 7-2 7-2 HPFA (Sheet 1 of 2) .................................................................................................................... 7-9

LIST OF TABLES

Table Page

1-1 SCBA BACS Specifications........................................................................................................ 1-3 1-2 Equipment and Accessories Supplied.......................................................................................... 1-5 1-3 Reference Publications Not Supplied .......................................................................................... 1-5 4-1 SCBA BACS Planned Maintenance System............................................................................... 4-2 5-1 ABPA Troubleshooting Guidelines............................................................................................. 5-1 5-2 HPFA Troubleshooting Guidelines ............................................................................................. 5-4 6-1 Tools Required ............................................................................................................................ 6-2 6-2 Materials Required ...................................................................................................................... 6-3 7-1 ABPA Parts List .......................................................................................................................... 7-6 7-2 HPFA Parts List......................................................................................................................... 7-11 7-3 Drive Air Hose Assembly Parts List ......................................................................................... 7-13 7-4 Filtered Air Hose Assembly Parts List ...................................................................................... 7-14 7-5 Filtered Air Supply Hose Assembly Parts List.......................................................................... 7-15 7-6 List of Manufacturers ................................................................................................................ 7-16 A-1 Setup Checklist .......................................................................................................................... A-3 A-2 Operation Checklist ................................................................................................................... A-5 A-3 Disassembly Checklist............................................................................................................... A-9 A-4 Emergency Operation Checklist .............................................................................................. A-11

ii

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FOREWORD

This technical manual contains procedures for operation and maintenance of the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS). The information in this manual is presented in seven chapters and one appendix, as follows:

• Chapter 1 – Introduction and Safety Precautions

• Chapter 2 – Operation

• Chapter 3 – Functional Description

• Chapter 4 – Scheduled Maintenance

• Chapter 5 – Troubleshooting

• Chapter 6 – Corrective Maintenance

• Chapter 7 – Illustrated Parts Breakdown

• Appendix A – Operational Checklists

Ships, training activities, supply points, depots, Naval Shipyards, and Supervisors of Shipbuilding are requested to arrange for the maximum practical use and evaluation of Naval Sea Systems Command (NAVSEA) technical manuals. The In-Service Engineering Agent (ISEA) may be contacted at Commanding Officer, Naval Surface Warfare Center Panama City, Attn: Code E53, 110 Vernon Avenue, Panama City, FL 32407.

All errors, omissions, discrepancies, and suggestions for improvement to NAVSEA technical manuals shall be forwarded to: Naval System Data Support Activity (NSDSA), Code 5E30, Port Hueneme Division, Naval Surface Warfare Center.

Technical Manual Deficiency/Evaluation Report (TMDER) (formally form NAVSEA 4160/1) can now be accessed, completed, and transmitted electronically to NSDSA. To access this form from the Internet, enter:

http://nsdsa.phdnswc.navy.mil/

At the Home Page, click on the “TMDER” icon. Complete the form and transmit as directed. All comments shall be thoroughly investigated and originators will be advised of action resulting from those comments.

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ABBREVIATIONS AND ACRONYMS

3-M Maintenance and Material Management

ABPA Air Booster Pump Assembly AHP Air High Pressure ALP Air Low Pressure Ao Operational Availability

BACS Breathing Air Charging System

CAGE Commercial and Government Entity CGA Compressed Gas Association CIN Course Identification Number CO Carbon Monoxide

FEDLOG Federal Logistics Record

H2O Water HP High Pressure HPFA High-Pressure Filter Assembly

IPB Illustrated Parts Breakdown ISEA In-Service Engineering Agent

MDS Maintenance Data Sheet METCAL Metrology and Calibration MIL-STD Military Standard MIP Maintenance Index Page MRC Maintenance Requirement Card MS Military Specification

NAVOSH Navy Occupational Safety and Health NAVSEA Naval Sea Systems Command NID Non-ionic Detergent NSDSA Naval System Data Support Activity NSN National Stock Number

OPNAV Office of the Chief of Naval Operations OPNAVINST Office of the Chief of Naval Operations Instruction

PMS Planned Maintenance System

QD Quick Disconnect

SAE Society of Automotive Engineers SCBA Self-Contained Breathing Apparatus SCBA BACS Self-Contained Breathing Apparatus Breathing Air Charging System SCFM Standard Cubic Feet Per Minute STEP Shipboard Training Enhancement Program

TMDER Technical Manual Deficiency/Evaluation Report TSP Trisodium Phosphate

USN United States Navy

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SAFETY SUMMARY

1. GENERAL SAFETY NOTICES.

The general safety notices supplement specific warnings and cautions appearing in this manual. All general safety notices and specific warnings and cautions must be understood and applied during all Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS) operation and maintenance functions. Should situations arise that are not covered in the general or specific safety notices, the commanding officer, or other authority, will issue orders as deemed necessary to cover the specific situation. In addition, refer to Office of the Chief of Naval Operations Instruction (OPNAVINST) 5100.19, Navy Occupational Safety and Health (NAVOSH) Program Manual for Forces Afloat, Vol I/II/III or OPNAVINST 5100.23, Navy Occupational Safety and Health (NAVOSH) Program Manual for any situation not covered in the general or specific safety notices.

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CHAPTER 1 INTRODUCTION AND SAFETY PRECAUTIONS

1.1 INTRODUCTION.

1.1.1 Purpose. This manual contains technical information necessary to install, operate, troubleshoot, and maintains the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS), hereinafter referred to as BACS (Figure 1-1). Reference to additional publications is given if auxiliary manuals exist or if lengthy procedures are required.

1.1.2 Scope. Information in this manual is presented in seven chapters and one appendix as follows:

• Chapter 1, Introduction and Safety Precautions, introduces safety considerations; presents a system description and specifications; reference data and publications; lists of equipment, accessories, and documents supplied with each system; equipment acceptance procedures; initial operational test procedures; and storage requirements.

• Chapter 2, Operation, provides a description of SCBA controls and indicators and detailed instructions on BACS setup, operating, and disassembly procedures. This chapter also provides BACS emergency shutdown procedures.

• Chapter 3, Functional Description, provides a detailed description of the function of each major component of the BACS.

• Chapter 4, Scheduled Maintenance, provides information required to perform scheduled and general maintenance procedures on the BACS.

• Chapter 5, Troubleshooting, provides tables to isolate BACS equipment malfunctions and direct the user to related maintenance procedures.

• Chapter 6, Corrective Maintenance, provides procedures required to perform corrective maintenance on the BACS.

• Chapter 7, Illustrated Parts Breakdown, provides illustrated parts breakdown for major components of the BACS.

• Appendix A, Operational Checklists, provides reproducible copies of checklists for BACS setup, operating, disassembly, and emergency procedures.

1.2 SYSTEM DESCRIPTION.

The BACS (Figure 1-1) is used to recharge SCBA cylinder assemblies with breathing quality air (Grade D as defined by Compressed Gas Association [CGA] publication G-7.1). High Pressure Filter Assemblies (HPFAs) are hard mounted to the ship’s bulkheads at various locations throughout the ship. The Air Booster Pump Assembly (ABPA) and connecting hose assemblies are portable and can be moved from one HPFA filter station to another. Personnel should become familiar with the shipboard location of all system components. Refer to Chapter 3 for a complete functional description of the system.

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1-2

1.3 SPECIFICATIONS.

Table 1-1 lists the specifications for the BACS.

Figure 1-1. SCBA BACS.

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Table 1-1. SCBA BACS Specifications.

Equipment Specifications

SCBA BACS • Specifications o Setup Time: 15 minutes o Operational Availability (AO): 90%

• Subassemblies o High-Pressure Filter Assembly (HPFA) o Air Booster Pump Assembly (ABPA) o Connecting Hose Assemblies

High-Pressure Filter Assembly

• Specifications o Dimensions: 9.0 in. x 11.0 in. x 28.0 in. (LxWxH) o Weight: 68 lb o Bulkhead-mounted aluminum housing o Filter cartridge duration: maximum usage life 6 months (shelf life 18 months) o Produces Grade D air IAW CGA G-7.1 o High Pressure (HP) air requirements: 2,000 - 3,000 psig o Maximum flow rate: 60 scfm (filtered air only) o Maximum operating pressure: 3,000 psig o Relief valve (AHP-V304) setting: 3,300 psig

Air Booster Pump Assembly

• Specifications o Dimensions: 33.5 in. x 14.4 in. x 22.5 in. (LxWxH) o Weight: 108 lb o Portable aluminum frame o HP air requirements: 2,000 - 3,000 psig o Boosts filtered HPFA air to 4,500 psig o Filtered air relief valve (AHP-V207) setting: 5,300 psig o Nominal drive air pressure: 125 psig o Drive air relief valve (ALP-V202) setting: 150 psig

Connecting Hose Assemblies

• Specifications o Drive Air/Filtered Air Hose Assemblies nominal operating pressure:

3,000 psig o Filtered Air Supply Hose Assembly nominal operating pressure: 4,500 psig o Thermoplastic hose

• Components o Drive Air Hose Assembly (H-101) o Filtered Air Hose Assembly (H-102) o Filtered Air Supply Hose Assembly (H-103)

1.4 SAFETY PRECAUTIONS.

Personnel using the BACS (Figure 1-1) shall observe the safety precautions specified in this technical manual. Personnel must understand the potential hazards associated with the BACS before operating or performing maintenance on the equipment. The following safety guidelines apply to operation and maintenance procedures in general and do not appear elsewhere in this publication, except by reference. Personnel must understand and comply with these guidelines during operation and maintenance of the BACS. The Safety Summary includes a comprehensive list of warnings and cautions that affect the system.

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1-4

1.4.1 Standard Safety Precautions. The BACS shall be used only after personnel have been properly instructed and have completed the BACS Shipboard Training Enhancement Program (STEP) operation training course. Personnel must u nd limitations. Personnel should

complete the BACS STEP maintenance training course.

P oroughly y practices the potential hazards associated w before operat on the equipment.

1.4.2 General Safety Instruc

se the equipment IAW instructions, labels, aalso

ersonneith the BACS

l must be th familiar with all safeting o e

and understandr p rforming maintenance

tions. Standard operational and maintenance safety precautions contained in the following documents apply

• Forces afloat must compl erations (OPNAVINST) 5100.19, tional S NAVOSH) Program Manual for Forces Afloat, Vol I/II/III

• Shore activities must com INST 5100.23, Navy Occupational Safety and Health (NAVOSH) Program Man

1.4.3 Warnings, Cautions, A

to the SCBA BACS:

y with Office of the Chief of Naval OpNavy Occupa afety and Health (

ply with OPNAVual.

nd Notes.

The warnings, cautions, and notes st be followed to prevent hazards to personnel and damage warnings, cautions, and notes a the text of i

appearing throughout this technical manual mu to equipment. The following notations define

s they are used in th s manual:

WARNING

Warnings highl dure, practice, condit result in injury

ight an essential operating or maintenance proceictly observed, couldion, or statement, which, if not str

to, or death of, personnel.

CAUTION

Cautions refer re, practice, condition, o ich, if not strictly observed, could result in damage to, or d ssion effectiveness, or long-term health

NOTE

an operating or maintenance procedure, practice, condition, or statement that is essential, but not of a known hazardous

to an operating or maintenance procedur statement, wh

estruction of, equipment, loss of mi hazards to personnel.

Notes refer to

nature.

1.4.4 Special Precautions. The warnings, cautions, and notes appearing throughout this technicamust be followed to prevent hazards to personnel and damage to equipment.

1.5

l manual

EQUIPMENT AND ACCESSORIES SUPPLIED.

Table 1-2 provides a listing of the equipment and accessories that are supplied with each BACS.

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Part Number (PN)

Table 1-2. Equipment and Accessories Supplied.

Qty Item Reference Number or

1 EACH • SCBA BACS Components: o High Pressure Filter Assembly (HPFA)1

1

PN 53

o Air Booster Pump Assembly (ABPA)

o 3)1

711ASSY7245941 PN 53711ASSY7245940

PN 53711ASSY7245948-1

o Drive Air Hose Assembly (H-101)1 o Filtered Air Hose Assembly (H-102)1

Filtered Air Supply Hose Assembly (H-10

PN 53711ASSY7245944-2 PN 53711ASSY7245944-1

o Quick-Charge Wand1 PN 200150-03

REFApparatus Breathing Air Charging System (SCBA BACS)

Planned Maintenance System (PMS) for Self-Contained Breathing MIP 5519/018

1 C

o Strap Wrench PN 53711-7245957 PN 54325A22

EA H • Special Tools: o Spanner Wrench2

3

1 Quantity is ship class dependent. 2 One per HPFA. 3 One per ship system. 1.6 REFERENCE PUBLICATIONS NOT SUPPLIED.

Table 1-3 lists reference publications that are not supplied with each BACS.

lication Number Application

Table 1-3 Reference Publications Not Supplied.

Publication Title PubBACS Shipboard Training Enhancement Program (STEP) Operational

Course Identification Number 5-0008

Computer-based training (CIN) A49

BACS STEP Maintenance CIN A495-0039 Computer-based training Cleaning of Ship t cleaning board Compressed Air Systems Military Standard

(MIL-STD-1622) Componen

Commodity Spe and testing fiberglass cylinders

cification for Air CGA G-7.1 Inspecting

Metrology and Calibration (METCAL) Program 4734.1A Calibration and maintenance of gauges

NAVSEA

Navy OccupatioProgram Manua

nd ce safety

nal Safety and Health (NAVOSH) l

OPNAVINST 5100.23 Operation amaintenan

Navy Occupatio and Health (NAVOSH) OPNAVINST 5100.19 Operation and nal SafetyProgram Manual for Forces Afloat, Vol I/II/III maintenance safety

Self-Contained Breathing Apparatus Scott® Air-Pak 4.5

S6220-EN-MMO-010 Operation and maintenance manual

Ships’ Maintenance and Material Management OPNAV(3-M) Manual

INST 4790.4 (Series) Failure analysis reporting

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EQUIPMENT ACCEP1.7 TANCE.

Upon receipt, BACS components must be inventoried and inspected. The equipment will not be ready for imm e operational use; shipboard installation is required.

1. n r

ediat

7.1 Inve to y. To ensure receipt of all items, conduct a visual inventory f all components IAW Table 1-2. The shipment in the sh Verify all serial numbers co g lists.

1.7.2 Maintena

o should be compared with the packing lists included ipping documentation. rrespond with the accompanying packin

nce Verification. Examine the maintenance records acco , Maintenance Req rify that requ e has been performed. if any, before operating the equipm

1.7.3 Inspe

mpanying shipments (e.g.uirement Cards [(MRCs)] and logbooks) to ve ired scheduled maintenanc Perform omitted MRCs, ent.

ction. Carefully remove each item from its packing container. Perform a thorough inspection, no di d by the packing and manufacturing process. Inspect for completeness of assemblies, faulty cracks, corrosion, and deterioration. Check the ABPA and HPFA for damage to the alu d control panel, and inspect the unit to ens trols and

on.

TIONAL TEST

ting any screpancies cause workmanship, dirt, minum frames an ure that all con

indicators are in good operating conditi

1.8 INITIAL OPERA .

a. Install filter cartridges and indicator elements IAW MIP 5519/018.

3.1.

rocedures paragraph 2.3.2.

d. Perform system tig

e. Disass IAW procedures described in paragraph 2.3.3.

1

b. Set up the BACS IAW procedures in paragraph 2.

c. Using an SCBA cylinder, conduct operational test IAW operating p

htness test IAW paragraph 6.5.1.

emble the BACS

.9 STORAGE REQUIREMENTS.

The BACS is a breathing supply support system; co e handled and storB repar ng-term storageLay-up SCBA Breathing Air Charging System. Gen rage precautions are listed as follows:

peratures higher than ºF (48.8ºC) or lower t

ight; s rubber compo

en

co en stored.

mponents must b ed with care. If the ACS will not be used for 90 days or longer, p e the system for lo

eral long-term sto IAW MRC LU-1,

• Do not store components in tem 120 han 0ºF (-17ºC).

• Do not store components in direct sunl sunlight deteriorate nents.

• Ensure components are dry and clean wh stored.

• Ensure flexible parts are not subjected to ntinuous distortion wh

• Ensure storage area is well-ventilated.

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Revision 1 2-1

CHAPTER 2

2.1 INTRODUCTION

OPERATION

.

• A description and illustration of the controls and indicators of the Self-Contained Breathing Apparatus

mergency operation procedures. Checklists for these procedures are provided in Appendix A.

This chapter contains the following information:

Breathing Air Charging System (SCBA BACS); hereinafter referred to as BACS.

• Operational use procedures providing setup, operation, disassembly, and e

2.2 CONTROLS AND INDICATORS.

Controls and indicators for the Air Booster Pump Assembly (ABPA), the High Pressure Filter Assemb(HPFA), and the Filtered Air Supply Hose A

ly ssembly (H-103) are illustrated in Figures 2-1 through 2-3. The

following information is provided for each illustration:

• Number – identifies corresponding callout

• Nomenclature – item name

• Function – provides brief description of function of item

• Normal Operating Condition – describes position of item during operational use or identifies

g hose assemblies.

maximum psig reading.

Figure 2-4 illustrates the connection points for correct attachment of the connectin

S6226-PD-MMO-010

2-2

No. Nomenclature Function Normal Operating Condition

1 Filtered Air Outlet Pressure Gauge (AHP-G203)

Indicates charging air pressure 4,500 psig

2 Filtered Air Inlet Pressure Gauge (AHP-G204)

Indicates pressure from the HPFA 3,000 psig

3 Drive Air Bleed Valve (ALP-V204)

Releases remaining drive air when charging is complete

Closed

4 Regulated Air Pressure Gauge (ALP-G202)

Indicates reduced drive air pressure after drive air has been regulated

125 psig

5 Drive Air Inlet Pressure Gauge (AHP-G201)

Indicates drive air pressure from HPFA 3,000 psig

6 Filtered Air Inlet Valve (AHP-V206)

Controls high-pressure filtered air from HPFA Open

7 Drive Air Control Valve (ALP-V203)

Controls drive air flow to booster pump from HPFA

Open

8 Drive Air Regulator (AHP-V201)

Regulates drive air pressure from HPFA 125 psig

Figure 2-1. Air Booster Pump Assembly (ABPA) Controls and Indicators.

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Revision 1 2-3

No. Nomenclature Function Normal Operating

Condition 1 HPFA Indicator (AHP-G301) Indicates air pressure in cartridge holders and

manifold block 3,000 psig

2 Shutoff Valve (AHP-V301) Stops air flow to ABPA Open 3 Bleed Valve (AHP-V302) Bleeds air pressure in HPFA Closed 4 Drain Valve (AHP-V305) Drains moisture from coalescor Closed 5 H2O/CO Indicator Indicates presence of water (H2O) or carbon

monoxide (CO) in breathing air Blue (H2O) and yellow (CO)

6 Relief Valve (AHP-V304) Protects HPFA from over-pressurization Closed

Figure 2-2. High-Pressure Filter Assembly (HPFA) Controls and Indicators.

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2-4

No. Nom perating Condition enclature Function Normal O

1 Shutoff Knob, Hose Isolation Va(AHP-V101, A

lve HP-V102)*

ssembly (H-103) Shutoff for Filtered Air Supply Hose A Closed

2 Bleed Handle, Hose Isol(AHP-V101, A

ation Valve HP-V102)* Supply Hose Assembly (H-103)

Bleeds filtered air supply from Filtered Air Closed

* B A 2 refer to the

Fig s.

oth HP-V101 and AHP-V10 Hose Isolation Valve.

ure 2-3. Filtered Air Supply Hose Assembly (H-103) Controls and Indicator

S6226-PD-MMO-010

Revision 1 2-5

Figu ts.

re 2-4. Inlet/Outlet Connection Poin

S6226-PD-MMO-010

2-6

3 OPERATING PROCEDURES2. .

ragraphs 2.3.1 through 2.3.4 address the following procedures: setup, operation, disassembly, and ergency operations. Appendix A provides corresponding checklists to be copied and used as needed.

2.3.1 Setup

Paem

. The Setup Checklist (Table A-1) should be completed when the following procedures are performed.

a. Move ABPA within 5 to 7 feet of HPFA.

b. Ensure ship high-pressure (HP) air system valve is closed.

WARNING

A color change from blue to pink in the H2O/CO indicator reveals high moisture content; a color change from yellow to brown indicates a high CO content. Any color change requires replacement of filter cartridges and indicator elements to avoid serious injury or death to personnel.

c. Check HPFA H2O/CO indicator for appropriate colors.

d. Ensure HPFA shutoff valve (AHP-V301) and drain valve (AHP-V305) are closed.

WARNING

Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury.

e. Open HPFA bleed valve (AHP-V302). Bleed pressure; close valve.

CAUTION

Ensure hoses are routed to avoid equipment damage.

f ve PA ir inlet att

g ere d AB ed air inlet es, and atta

ose Assembly (H-103) to ABPA filtered air supply.

i. Ensure Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) sh

. Remove dust caps, connect driquick-disconnect sockets, and

air hose assembly (H-101) to HPFA and ABach snap shackles to eye nuts.

drive a

. Remove dust caps, connect filtquick-disconnect nippl

d air hose assembly (H-102) to HPFA anch snap shackles to eye nuts.

PA filter

h. Remove dust caps and connect Filtered Air Supply H

utoff knobs and bleed handles are closed.

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Revision 1 2-7

3.2 Operation2. . The Operation Checklist (Table A-2) should be completed when the following procedures med.

WARNING

are perfor

Before operating the BACS, ensure that a gas sample has been taken within the last three months IAW Maintenance Requirements Cards (MRC) Q-1 to ensure that Grade D air quality, as defined by CGA G-7.1, is being produced to avoid serious injury or death to personnel.

a. Ensure ABPA drive air regulator (AHP-V201) is fully unloaded by rotating counterclockwise.

b. Ensure ABPA drive air control valve (ALP-V203), drive air bleed valve (ALP-V204), and filtered air inlet valve (AHP-206) are closed.

c. Slowly open ship HP air system supply valve.

d. Turn HPFA shutoff valve (AHP-V301) fully counterclockwise, then back off valve 1/4 turn.

e. Adjust ABPA drive air regulator (AHP-V201) until regulated air pressure gauge (ALP-G202) reads 125 ±5 psig.

NOTE

The system can be configured to charge the following: (1) one or two SCBA cylinders, (2) one or two quick-charge wands, or (3) one SCBA cylinder and one quick-charge wand.

f. Attach Filtered Air Supply Hose Assembly (H-103) to SCBA cylinder assembly(ies) and/or quick-charge wand(s) supplied with SCBAs.

WARNING

Do not refill any SCBA cylinder assembly that is damaged. Failures to inspect, depressurize, and remove a damaged SCBA cylinder assembly may result in serious injury or death to personnel.

g. Prior to charging an SCBA cylinder assembly, inspect entire SCBA or SCBA cylinder assembly for evidence of exposure to chemicals, high temperature, impact damage, or worn components.

NOTE

If quick-charge wands are used, proceed to step s.

h. Open SCBA cylinder(s) valve fully by rotating counterclockwise, then back off valve 1/4 turn.

Filtered air outlet pressure gauge (AHP-G203) will indicate SCBA cylinder pressure.

NOTE

S6226-PD-MMO-010

2-8

se Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knobs for each SCBA cylinder assembly connected.

essure gauge (AHP-G204) are equal, open drive air control valve (ALP-V203) four to six complete turns.

NOTE

inutes to vent moisture during charging evolution.

l. When air booster pump stops or SCBA dual-reading pressure indicator reads approximately 4,500 psig, close Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-101/ AHP

i. Open Filtered Air Supply Ho

j. Open ABPA filtered air inlet valve (AHP-V206).

k. When readings on ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet pr

Open HPFA drain valve (AHP-V305) approximately every 15 m

-V102) shutoff knob(s).

WARNING

Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death from flying debris. Operator shall announceBLEEDING DOWN to warn nearby personnel. Operator must wear

protective eyewear and hearing protection to prevent personal injury.

m. Close each SCBA cylinder valve fully; y Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) bleed handle(s) to bleed air between each SCBA cylinder assem bleed handl

n. Disco er assembly. If mission is complete, proceed to step y. If not, continue with next step.

o. Attach Filtered Air Supply Hose Assembly (H-103) to SCBA cylinder assembly.

p. Open each SCBA cylinder valve fully, k off valve 1/4 turn.

q. Open Filtered A HP-V101/AHP-V102) shutoff knob(s) for each SCBA cylinder assembly connected.

r. plete, proceed to step y.

open Filtered Air Suppl

bly and the corresponding hose isolation valve (AHP-V101/AHP-V102). Closee(s).

nnect Filtered Air Supply Hose Assembly (H-103) from each SCBA cylind

and then bac

ir Supply Hose Assembly (H-103) hose isolation valves (A

As needed, repeat procedure beginning with step l. When mission is com

CAUTION

Ensure hoses are routed to avoid equipment damage.

s. Open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102)

t. Open ABPA filtered air inlet valve (AHP-V206).

shutoff knob(s) for each quick-charge wand connected in step f.

S6226-PD-MMO-010

Revision 1 2-9

ure gauge (AHP-G204) are equal, open drive air control valve (ALP-V203) four to six complete turns counterclockwise.

v. Connect a quick-charge wand to each

w. As each SCBA is filled, di

x. Repe

y. Close

u. When readings on ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet press

SCBA.

sconnect quick-charge wand.

at steps v and w as needed. When mission is complete, proceed to step y.

ship HP air system valve.

WARNING

Before opening bleed valves, ensure all personnel stand clear to avoid ebris. Operator shall announce

BLEEDING DOWN to warn nearby personnel. Operator must wear

ated air pressure gauge (ALP-G202) and drive air inlet pressure gauge (AHP-G201) should read zero.

z. Slow 204). Bleed drive

aa. Close HPFA shutoff valve (AHP-V301).

WARNING

serious injury or death from flying d

protective eyewear and hearing protection to prevent personal injury.

NOTE

ABPA regul

ly open HPFA drain valve (AHP-V305) and ABPA drive air bleed valve (ALP-V air circuit. Close valves (AHP-V305 and ALP-V204).

Before opening bleed valves, rsonnel stand clear to avoid serious injury or death from flying debris. Operator shall announce

NOTE

bb. Depressurize system IAW one of the foll

(1) SCBA cylinder assembly charging configuration

(a) Connect Filtered Air Supply Hose Assembly (H 103) to each SCBA cylinder assembly and open Filtered Air Supply Hose Assembly (H-103) hose isolation valves

(b) Bleed system using Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) bleed handle(s).

ensure all pe

BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury.

ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet pressure gauge (AHP-G204) should read zero.

owing:

(AHP-V101/AHP-V102) shutoff knob(s).

S6226-PD-MMO-010

2-10

bleed handle(s).

e Assembly (H-103) from SCBA cylinder assembly.

(a) Bleed system using Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V

s ob(s) and bleed handle(s).

cc. valve (AHP-V206) and drive air control valve (ALP-V203) fully clockwise.

dd. Back off ABPA drive air regulator (AH spring tension is released. The BACS is now in STANDBY condition.

2.3.3 Disasse

(c) Close Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knob(s) and

(d) Disconnect Filtered Air Supply Hos

(2) Quick-charge configuration

102) bleed handle(s).

(b) Close Filtered Air Supply Hose Assembly (H-103) hose isolation valve(AHP-V101/AHP-V102) shutoff kn

(c) Remove quick-charge wand from Filtered Air Supply Hose Assembly (H-103).

Rotate ABPA filtered air inlet

P-V201) until

mbly. The Disassembly Checklist (Table A-3) should be completed when the ferformed.

nnect drive air hose assembly (H-101) and filtered air hose assembly (H-10

ollowing procedures are p

a. Disco 2) from HPFA and

b.

c. FA and ABPA drive air and filtered air connection points.

ABPA. Cap hose assemblies.

Disconnect Filtered Air Supply Hose Assembly (H-103) from ABPA. Cap hose assembly.

Cap all HP

d. Perform scheduled maintenance, as required.

e. Stow hose assemblies and ABPA IAW ship procedures.

2.3.4 Emergency Operation. Emergency operation procedures shall be followBACS not operate in a normal manner. An Emergency Operation Checklist (Table

ed immediately should the A-4) should be completed.

a. Immediately close ship HP air system valve.

b. Refer to Chapter 5, Troubleshooting, for fault isolation procedures.

S6226-PD-MMO-010

Revision 1 3-1

.1 I

CHAPTER 3 FUNCTIONAL DESCRIPTION

3 NTRODUCTION.

This chapter defines the functions of the major equipment groups for the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS). A description of how the equipment operates is also

Figure 3-1. SCBA BACS Functional Schematic and Flow Diagram.

FILTERIN-LINE

FILTERIN-LINE

H-103

H-101

HP AIR GAUGE

included. Figure 3-1 provides a functional schematic and flow diagram of the system.

MANIFOLD

PUMPBOOSTER

SWITCHPILOTFILTER

DRIVE AIR

H-102

SYSTEM VALVEHP AIR

AIR BOOSTER PUMP ASSEMBLY

HIGH PRESSURE FILTER ASSEMBLY

P

AHP-V301

AHP-G301INDICATOR

AHP-V302

DESICCANTFILTER

AHP-V303

AHP-V305

AHP-V304

SHIP'S AIR IN

HOPCALITE/DESICCANT/

CHARCOAL FILTER

AHP-G201 ALP-G202ALP-V204

REG

AHP-V201 ALP-V203

AHP-V205

ALP-V202

AHP-V206

AHP-G204

TAN

KSU

RG

E

AHP-G203

P

EXTERNAL PILOT AIR INLET

AHP-V207

DRIVE AIR INLET

DRIVEAIR INLET

FILTERAIR INLET

CHARGEQUICK

WAND

FILTERAIR SUPPLY

S6226-PD-MMO-010

3-2

.2 DESCRIPTIO3 N.

The BACS is used by shipboard damage control and firefighting personnel as a means to charge SCBAs to a ressure of 4,500 ps t

(CGA) G-7.1). The BACS can be used for charging SCBA cylinder assemblies or for quick-charging SCBA. The BACS is comprised of three subassemblies: the Air Booster Pump Assembly (ABPA), the High Pressure

m the ship high-pressure air system. The ship high-pressure air system is hard-piped into the bulkhead-mounted HPFA,

assemblies. The filtered mblies via a Filtered Air Supply Hose Assembly (H-102). The unfiltered high-pressure air from the HPFA is used to operate the booster pump.

3.2.1 ABPA

p i wi h breathing quality air (Grade D as defined by the Compressed Gas Association

Filter Assembly (HPFA), and connecting hose assemblies. The BACS receives high-pressure air fro

where it is divided into filtered and unfiltered air and then routed to the ABPA via two high-pressure hoseair is used to charge SCBA or SCBA cylinder asse

. The ABP ular frame. The frame supports a control panel and is shielded by protective front and back covers. The ABPA receives both

e ABPA via a quick disconnect (QD), passes by a gauge, and flows through a shutoff valve, where airflow into

4,500 psig (1) to the sensing port of a pilot switch (AHP-V205),

SCBA cyl essure relief valve is attached to the surge tank and is used to prevent

red d passes through a filter into a cross before taking three paths: (1) to the pilot

circuit; an hat controls booster pump speed. Figure 3-2 illustrates and lists ompo

A is a two-man portable system housed within an aluminum tub

high-pressure filtered air and high-pressure drive (unfiltered) air from the HPFA. The filtered air enters th

the booster pump is controlled. The air enters the booster pump, where the air pressure is increased to . The high-pressure air then takes three paths:

which controls the flow of drive air to the booster pump; (2) to a surge tank, which serves to absorb high-pressure fluctuations during operation; and (3) through an in-line filter, past a high pressure gauge, and into the

inder assembly. A high-prover-pressurization of the filtered air circuit. The drive air enters the ABPA via a QD, passes a high-pressure gauge, and flows through a regulator, where pressure is reduced to 125 ± 5 psig. The reduced air is monitoby a low-pressure gauge answitch (AHP-V205), which automatically stops the flow of drive air to the booster pump when the filtered air pressure reaches 4,500 psig; (2) to a relief valve (AHP-V304) that prevents over-pressurization of the drive air

d (3) past a flow control valve tc nents of the ABPA

3.2.1.1 Drive Air Inlet Pressure Gauge (AHP-G201). The drive air Inlet P0 to 5,000 psig pressure gauge that displays regulator inlet pressure from the HPFA.

ressure Indicator is a

3.2.1.2 Drive Air Regulator (AHP-V201). The drive air regulator reduces the ship high-pressure air stemsy to 125 ± 5 psig.

3.2.1.3 Regulated Air Pressure Gauge (ALP-G202). The Regulated Air Pressure Indicator is a 0 to 200 psig pressure gauge that displays the reduced air pressure reading after the drive air pressure is regulated.

3.2.1.4 Drive Air Filter. The drive air filter removes an automatic drain valve (AHP-V305).

moisture and debris from drive air. This filter also has

3.2.1.5 Drive Air Relief Valve (ALP-V202). The drive air relief valve is located between the drive air gulator (AHP-V201) and booster pump and actuates if drive air exceeds 150 psig.

2.1.6 Drive Air Bleed Valve (ALP-V204)

re

3. . The drive air bleed valve is used to release remaining drive air to the atmosphere after charging is complete.

3.2.1.7 Drive Air Control Valve (ALP-V203). The Drive Air Control Valve is a needle valve that controls the flow of drive air to the booster pump. The more the drive air valve is opened, the faster the booster pump will operate.

S6226-PD-MMO-010

Revision 1 3-3

Number Nomenclature Number Nomenclature 1 Filtered Air Outlet Pressure Gauge 9 Booster Pump 2 Drive Air Relief Valve 10 Drive Air Regulator 3 In-Line Filter 11 Drive Air Filter 4 Filtered Air Inlet Pressure Gauge 12 Drive Air Control Valve 5 Drive Air Bleed Valve 13 Surge Tank 6 Filtered Air Inlet Valve 14 Filtered Air Relief valve 7 Regulated Air Pressure Gauge 15 Pilot Switch 8 Drive Air Inlet Pressure Gauge

Figure 3-2. Air Booster Pump Assembly (ABPA).

3.2.1.8 Filtered Air Inlet Pressure Gauge (AHP-G204). The Filtered Air Inlet Pressure Gauge is a 0 to 5,000 psig pressure gauge that indicates the filtered air pressure from the HPFA.

3.2.1.9 Filtered Air Inlet Valve (AHP-V206). The Filtered Air Inlet Valve is a needle valve that is used to control filtered air flow through the booster pump to the SCBA cylinder assemblies.

3.2.1.10 Booster Pump. The booster pump, powered by low pressure drive air, is used to compress air filtered by the HPFA to 4,500 psig.

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3-4

3.2.1.11 Surge Tank. The surge tank provides a volume to absorb high pressure fluctuations.

3.2.1.12 Filtered Air Relief Valve (AHP-V207). The Filtered Air Relief Valve is a relief valve that is located on the surge tank, and actuates if air pressure exceeds 5,300 psig.

3.2.1.13 Pilot Switch (AHP-V205). The pilot switch senses when the booster pump discharge pressure reaches 4,500 psig and shuts off the drive air supply.

3.2.1.14 In-Line Filter. The in-line filter removes particulates from booster pump discharge prior to entering the quick-charge wands.

3.2.1.15 Filtered Air Outlet Pressure Gauge (AHP-G203). The Filtered Air Outlet Pressure Gauge is a 0 to 6,000 psig pressure gauge that indicates charging air pressure.

3.2.2 HPFA. The HPFA is bulkhead-mounted and hard-piped into the ship high-pressure service line via abulkhead union in the top back center of the HPFA. Air flows through the bulkhead fitting to a tee that directsthe air to either (1) the drive air quick disconnect nipple and in-line filter ready for discharge to the ABP(2) to the HPFA filters. Air directed to the HPFA filters first passes through a coalescor filter, through a check valve, and then to the two cartridge holders. The first cartridge holder houses a desiccant cartridge for moisture removal. The second cartridge holder houses a cartridge that contains a desiccant for moisture removal, as well as a catalyst for conversion of carbon monoxide (CO) to carbon dioxide (CO

A or

al

ts

2), and charcofor odor removal. From the cartridge holders, the air enters the manifold, which directs the air to an H2O/CO indicator housing and a pressure gauge. The air then passes through a micronic filter to a shutoff valve and a quick disconnect socket, and is ready for discharge to the ABPA. Figure 3-3 illustrates and lists componenof the HPFA.

3.2.2.1 Coalescor Filter. The coalescor filter removes moisture from air supplied by the ship high-pressure air system.

3.2.2.2 Relief Valve (AHP-V304). The relief valve actuates if pressure in the filter assembly exceed3,300 psig.

s

3.2.2.3 Check Valve (AHP-V303). The check valve ensures a one-way flow of air from the ship high-pressure air system to the cartridge holders.

3.2.2.4 Cartridge Holders. The two cartridge holders are identical, but hold different filter cartridges. The first, located on the right side of the assembly (labeled TOWER 1) holds a desiccant cartridge for moisture removal; the second, located on the left side of the assembly (labeled TOWER 2) holds a composite filter

3.2.2.5 Manifold

element containing a desiccant, a catalyst for conversion of CO to CO2, and charcoal for odor removal.

. The manifold houses the H2O/CO indicator, HPFA gauge (AHP-G301), in-line filter,

3.2.2.6 H

shutoff valve (AHP-V301), and bleed valve (AHP-V302).

2O/CO Indicator. The H2O/ CO indicator is located downstream of the cartridge holders and

3.2.2.7 HPFA Indicator (AHP-G301)

indicates the presence of water and carbon monoxide in breathing air.

. The HPFA Indicator is a 0 to 5,000 psig pressure indicator that displays filtered air pressure in the HPFA.

3.2.2.8 In-Line Filters. The first in-line filter removes particulates from the drive air before it is discharged to the ABPA and the second removes any remaining particulates from the filtered air.

2.2.9 Shutoff Valve (AHP-V301)3. . The shutoff valve controls filtered air flow to the ABPA.

S6226-PD-MMO-010

Revision 1 3-5

umb um ture N er Nomenclature N ber Nomencla1 7 Relief Valve Drain Valve 2 8 HPFA Indicator Coalescor Filter 3 9 alve Drain Check V4 10 Cartridge Holder Bleed Valve 5 Shutoff Valve 11 Manifold 6 H2O/CO Indicator 12 In-Line Filter

Figure 3-3. High Pressure Filter Assembly (HPFA).

3.2.2.10 Bleed Valve (AHP-V302). The bleed valve is used to release air from the filter assembly prior to changing filter cartridges.

3.2.2.11 Drain Valve (AHP-V305). The drain valve is used to periodically remove oil and moisture that

blies

has fallen to the bottom of the coalescor filter housing.

3.2.3 Connecting Hose Assem .

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3-6

3.2.3.1 Drive Air Hose Assembly. The Drive Air Hose Assembly (H-101) connects the HPFA drive air outlet QD to the ABPA drive air inlet QD.

3.2.3.2 Filtered Air Hose Assembly. The Filtered Air Hose Assembly (H-102) connects the HPFA filtered air outlet QD to the ABPA filtered air inlet QD.

3.2.3.3 Filtered Air Supply Hose Assembly. The Filtered Air Supply Hose Assembly (H-103) connects to the ABPA using a CGA 347 nipple with hand-tight nut. The Filtered Air Supply Hose Assembly (H-103)

SCBA cylinder and/or quick charge.

consists of two branches, each containing a combination bleed and shutoff valve. This design allows twopossible charging configurations—

3.2.3.4 Quick-Charge Wand. The Quick-Charge Wand is purchased from the SCBA manufacturer and allows a quick-charge operation when connected to the Filtered Air Supply Hose Assembly (H-103).

S6226-PD-MMO-010

Revision 1 4-1

CHAPTER 4 SCHEDULED MAINTENANCE

WARNING

Omission or negligent performance of prescribed maintenance procedures for this equipment could result in equipment failure and serious injury or death to personnel.

4.1 INTRODUCTION.

Proper scheduling and performance of preventive maintenance actions reduces equipment failures and ensures efficient performance of the Self-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS), hereinafter referred to as BACS. This chapter outlines safety requirements, defines the maintenance concept, references the BACS Planned Maintenance System (PMS), discusses reporting requirements, and provides general maintenance instructions relating to both scheduled and unscheduled (corrective) maintenance actions.

4.2 SCOPE.

The preventive maintenance requirements for the BACS are addressed in this chapter to assist supervisors and maintenance personnel in planning, scheduling, and documenting maintenance actions. The information in this chapter supplements the BACS PMS (paragraph 4.5) and is presented in the following sequence:

• Safety Requirements

• Maintenance Concept

• Planned Maintenance System

• United States Navy (USN) Maintenance and Material Management (3-M) System Coverage and Problem Reporting

• General Maintenance

4.3 SAFETY EQU

Instructions

R IREMENTS.

Maintenance personnel shall read and thoroughly understan e sa contained in this manual and the approp te M quirement Card (MRC) contained in the SC MS before performing an ain CS. Forces afloat should al th Office of the Chief of

val Operations Instructi Navy Occupation (NAVOSH) ogram Manual for Force OPNAVINST 5100.23, vy Occupational Safety and Health (NAVOSH) Program Manual.

d th fety precautions BA BACS Pria aintenance Re

y m tenance on the BAon (OPNAVINST) 5100.19,

so comply wial Safety and HealthNa

Pr s Afloat, Vol I/II/III. Shore activities should comply withNa

4.4 MAINTENANCE CONCEPT.

The BACS maintenance concept is based on the Navy PMS, which classifies maintenance into two categoriesscheduled and unscheduled.

:

4.4.1 Scheduled Maintenance. Scheduled maintenance primarily ireliable system operation and includes actions such as in

nvolves actions required to ensure spection, cleaning, lubrication, leak testing, and

S6226-PD-MMO-010

4-2

es located in Chapter 2 of this manual.

operational testing. Scheduled maintenance requirements are provided in the BACS PMS (paragraph 4.5) andare also integrated in the operating procedur

4.4.2 Unscheduled Maintenance. Unscheduled (corrective) maintenance includes actions required tlocate equipment faults and to correct failures or perform

o ance degradations. Unscheduled maintenance actions

that include troubleshooting and parts replacements are performed by maintenance technicians who are adequately trained in the appropriate service requirements. Unscheduled maintenance is covered in Chapter 5, Troubleshooting, and in Chapter 6, Corrective Maintenance.

4.5 PLANNED MAINTENANCE SYSTEM.

Table 4-1 lists the nine MRCs that govern the SCBA BACS PMS. The MRCs are indexed and referenced onMaintenance Index Page (MIP) 5519/018, SCBA BACS. MIP 5519/018 provides a summary of the

maintenance actions found on the MRCs, along with periodicity codes, personnel requirements, man-hours, d any related maintenance.

Table 4-1. SCBA BACS Planned Maintenance System.

Periodicity MRC Description

an

Q-1 Analyze Charging System Air Quality Q-2 Test Operate Air Booster Pump Assembly (ABPA) S-1 Replace High-Pressure Filter Assembly (HPFA) Tower Cartridges and HPFA H2O/CO Indicator

Elements A-1 Replace Air Booster Pump Assembly (ABPA) Drive Air Filter and Seal A-2 Replace High-Pressure Filter Assembly (HPFA) Coalescor Element A-3 Inspect Teflon, Thermoplastic, and Metal Hoses, End Fittings, and Supports

18M-1 Remove ABPA Pressure Gauge(s), deliver to IMA for calibration, install calibrated ABPA Pressure Gauge(s), and Test for Leaks

36M-1 Test Set Pressure of Drive Air Relief Valve (ALP-V202); Remove and Deliver Valve(s) to IMA for Testing

R-1 Inspect SCBA BACS 4.6 UNITED STATES NAVY MAINTENANCE AND MATERIAL MANAGEMENT SYSTEM COVERAGE AND PROBLEM REPORTING.

The provisions of the OPNAVINST 4790.4 series, Ships’ Maintenance and Material Management (3-M) Manual, apply to the SCBA BACS. Accordingly, any problems or need for corrective maintenance arising from performance of the maintenance actions contained in the SCBA BACS MRCs should be properly reported using Office of the Chief of Naval Operations (OPNAV) Form 4790/2K to ensure timely and accurate Maintenance Data System (MDS) documentation of SCBA BACS performance in the Fleet. In addition to Fleet requirements, MDS input from Fleet units is used by the In-Service Engineering Agent (ISEA) to identify and correct problems within the system itself or the related documentation and provisioning, including Coordinated Shipboard Allowance List support. The ISEA may be contacted at Commanding Officer, Naval Surface Warfare Center Panama City, Attn: Code E53, 110 Vernon Avenue, Panama City, FL 32407.

S6226-PD-MMO-010

Revision 1 4-3

4.7 GENERAL MAINTENANCE INSTRUCTIONS.

WARNING

If in doubt about the serviceabilitimmediately. Use only approved maintenance parts. Component failure

he HPFA, ensure high pressure air source is turned off and all pressure has been bled from the system.

exposure to escaping high pressure gas may result in serious injury or death to personnel.

OT LOOSEN OR TIGHTEN FITTINGS WHILE SYSTEM IS UNDER PRESSURE. Failure to comply could result in damage to

nd serious injury or death to personnel.

y of a part, repair or replace it

during operations may result in serious injury or death to personnel.

Before performing maintenance on t

Accidental

Do not use trisodium phosphate (TSP) for cleaning HPFA or ABPA aluminum components. Use may result in equipment failure and serious injury or death to personnel.

DO N

equipment a

4.7.1 Equipment Disassembly and Parts Replacement. Disassemble equipment only as necessary for each scheduled maintenance procedure. Ensure proper tag-out procedures are performed prior to conducting maintenance. Use only approved BACS replacement components. Ensure all replacement components have been cleaned IAW MIL-STD-1622, Cleaning of Shipboard Compressed Air Systems.

4.7.1.1 Bagging Components. To maintain cleanliness of system, replace all dust caps and bag all exp d orming maintenance.

WARNING

ose components while perf

Cleanliness is imperative in handling and maintaining the SCBA BACS. st be kept free of oil, grease, rust, or other

within an assembly could result in d serious injury or death to personnel.

All tools and parts mucontamination. Foreign substances equipment failure an

WARNING

Do not use TSP for cleaning HPFA or ABPA aluminum components. Use may result in equipment failure and serious injury or death to personnel.

S6226-PD-MMO-010

4-4

4.7.2 General Cleaning Procedure. Clean is defined as free of all loose scale, rust, grit, filings, dirt, oil, grease, and other foreign substances when viewed by the unaided eye. It is vitally important to keep the work area and parts clean during maintenance of breathing air systems and equipment. To avoid introducing

esh

4.7.3 Leak Detection

contaminants or foreign particles into joints or connections that need to be opened for maintenance, clean the affected parts with a soft bristle brush and cleaning solution prepared by mixing 1 teaspoon of MIL-D-16791, Type 1 non-ionic detergent (NID) to 1 gallon of warm, fresh water. Rinse the cleaned parts with clean, frwater and wipe dry with a clean cloth or air dry.

. The use of MIL-L-25567D, Type I leak-detection compound is preferred for leak hat were broken for maintenance. The NID solution

mentioned in paragraph 4.7.2 may also be used for leak testing if necessary. testing all SCBA BACS air system connections t

4.7.4 Anti-seize Tape. The use of MIL-T-27730 anti-seize tape is required for all BACS pipe thretaping applications. Apply tape as follows:

ad

• Thoroughly clean male and female threads assuring the removal of all previously applied anti-seize tape. Do not allow f any taped fittings.

ale pipe thread beginning hird thread.

• ing ca le the threads twice.

• e anti-

4.7.5

tape particles to enter lines or valves during disassembly o

• Wrap tape in spiral direction of m with second or t

Us re not to contaminate the tape, encirc

Us seize tape on pipe threads only.

Lubricants. Only MIL-S-8660 lubricant is authorized. Apply lubricants sparingly.

4.7.6 ings O-R . inspected for damage and replaced if necess

CAUTION

Exposed O-rings that are not required to be removed shall be ary.

To avoid damage to O-ring groove, remove O-rings only using fingers or the appropriate tool from an O-ring extractor kit.

4.7.6.1 O-Ring Removal. If an O-ring cannot be removed with fingers, use an O-ring installation and removal tool. Scratching the O-ring groove may cause leakage or premature seal failure. Unless otherwise directed, all removed O-rings shall be cut and discarded.

4.7.6.2 O-Ring Installation. Strict cleanliness and proper lubrication are essential during O-ring installation. Ensure new O-rings are of the proper size and material. To ensure correct installation, observethe following:

• Visually inspect new O-rings for deformities or compression set, hardening, or brittleness, nicks orcuts, pits or blisters, or any other signs of damage. Cut and discard damaged O-rings and obtain new O-rings for replacement.

• Ensure parts are clean throughout the replacement procedure. Dirt, chips, or foreign particles in

O-ring grooves can cause leakage or damage to O-rings.

S6226-PD-MMO-010

Revision 1 4-5/(4-6 blank)

• Lubricate O-rings before assembly. Use only approved lubricants for O-rings. Apply lubricant sparingly; excess lubricant can foul other

• Do not needed for proper i

• Ensure ent of large O-rings with rel

• Do not ble, support, cone, or

• When re or exposed.

• During installation of face seal O-rings,

• When re ment. Rotating g of seals.

components.

overstretch O-rings during replacement. To avoid O-ring damage, stretch only asnstallation.

O-rings are not twisted in groove as twisting occurs easily during replacematively small cross-sectional diameters.

force O-rings over corners, threads, splines, ports, or other sharp edges. Use thim other device to prevent O-rings from contacting sharp edges of parts.

assembling SAE/MS straight-thread connections, ensure O-rings are not pinched

ensure O-rings are properly aligned.

assembling components, apply closing force to produce straight, longitudinal move or twisting movements should be avoided to prevent bunching, cutting, or tearin

S6226-PD-MMO-010

Revision 1 5-1

CHAPTER 5

5.1 INTRODUCTION

TROUBLESHOOTING

.

This chapter contains the troubleshootisource of equipment ction or performance degradation in the Self-Contained Breathing Apparatus Bre i

5.2 GENE IONS

ng procedures and data necessary to assist personnel in locating the malfun

ath ng Air Charging System (SCBA BACS).

RAL TROUBLESHOOTING INSTRUCT .

Trou leThis ma spections, or corrective acti notif t

Tab ctive actions for Air Boo rReferenapplicab

Table 5-1. ABPA Troubleshooting Guidelines.

Symptom Possible Cause(s) Fault Locating Procedure Corrective Action(s)

b shooting is based on locating potential faults in the equipment and taking timely corrective action. nual cannot possibly list all malfunctions that may occur nor all causes, tests, in

ons that may apply. If a malfunction is not listed or is not remedied by the suggested corrective action(s), y he supervisor.

les 5-1 and 5-2 list symptoms, possible causes, fault locating procedures, and correste Pump Assembly (ABPA) and High-Pressure Filter Assembly (HPFA) malfunctions and failures.

ces to additional maintenance procedures located elsewhere in this manual are included where le.

a. Ship high-pressure air system valve(s) closed.

a. Ensure high-pressure air is available to HPFA and ABPA.

a. If no pressure indicated, ensure correct execution of setup and operating procedures in paragraphs 2.3.1 and 2.3.2 have been followed correctly.

1. Drive air inlet pressure gauge (AHP-G201) not operational.

b. Drive air inlet pressure gauge (AHP-G201) failed.

b. Compare drive air inlet pressure gauge (AHP-G201) to high-pressure air gauge on bulkhead.

b. Replace gauge IAW paragraph 6.6.9.

a. Ship high-pressure air system valve(s) closed.

a. Check drive air inlet pressure gauge (AHP-G201) reading.

a. If no pressure indicated, ensure correct execution of setup and operating procedures in paragraphs 2.3.1 and 2.3.2 have been followed correctly.

b. Regulated air pressure gauge (ALP-G202) failed.

b. Open drive air bleed valve (ALP-V204).

b. If air escapes from (ALP-V204), replace regulated air pressure gauge (ALP-G202) IAW paragraph 6.6.9.

2. Regulated air pressure gauge (ALP-G202) not operational.

c. Drive air regulator failed.

c. Determine if regulator control knob rotates freely.

c. If regulator control knob rotates freely, adjust regulator control knob IAW paragraph 6.6.2.d. If regulator control knob does not rotate freely, replace drive air regulator IAW paragraph 6.6.2.

S6226-PD-MMO-010

5-2 Revision 1

Table 5-1. ABPA Troubleshooting Guidelines – Continued.

Symptom Possible Cause(s) Fault Locating Procedure Corrective Action(s) a. No high-pressure

filtered air. a. Ensure HPFA shutoff

valve (AHP-V301) is open.

a. If closed, open HPFA shutoff valve (AHP-V301). If open, proceed to Table 5-2.

3. Filtered air inlet pressure gauge (AHP-G204) not operational. b. Filtered air inlet

pressure gauge (AHP-G204) failed.

b. Compare filtered air inlet pressure gauge (AHP-G204) to drive air inlet pressure gauge (AHP-G201).

b. Replace filtered air inlet pressure gauge (AHP-G204) IAW paragraph 6.6.9.

a. Insufficient drive air pressure.

a. Ensure drive air pressure on regulated air pressure gauge (ALP-G202) reads at least 125 psig.

a. Adjust drive air regulator (AHP-V201) until regulated air pressure gauge (ALP-G202) reads 125 psi.

b. Clogged drive air filter.

b. Ensure source pressure is above 2,000 psig, but drive air regulator (AHP-V201) is 125 ±5 psig.

b. Replace filter element IAW MRC A-1.

c. Clogged in-line filter. c. Ensure filtered air high pressure relief valve (AHP-V207) is not venting.

c. Replace in-line filter IAW paragraph 6.6.12.

d. Pilot switch (AHP-V205) set incorrectly.

d. Observe if pump continuously stalls at the same pressure.

d. Adjust pilot switch (AHP-V205) IAW paragraph 6.6.6.b.

e. Low or loss of high-pressure air.

e. Check ship high-pressure air system pressure. Ensure high-pressure air system pressure is between 2,000 and 3,000 psig.

e. Recharge ship high-pressure air system.

f. Interior pump friction. f. Perform functional test IAW MRC Q-2R.

f. If pump fails functional test, replace IAW paragraph 6.6.1.

g. Excess moisture in drive air path.

g. Open HPFA drain valve (AHP-V305) to check for excessive moisture discharge.

g. If no pressure indicated, ensure correct execution of setup and operating procedures in paragraphs 2.3.1 and 2.3.2.

h. Faulty spooler valve assembly.

h1. Ensure head of spooler valve assembly does not protrude beyond the banjo fitting.

h2. If the head of the spooler valve assembly is positioned near the banjo fitting opening, press the head to ensure valve moves freely.

h. Replace spooler valve assembly IAW paragraph 6.6.13.

4. Pump stalls at less than 4,500 psig or becomes sluggish.

i. Low or loss of ship high-pressure air system.

i. Check high-pressure air gauge upstream of HPFA.

i. Restart ship high-pressure air compressors.

S6226-PD-MMO-010

Revision 1 5-3

Table 5-1. ABPA Tro delines – Continued.

Possible Cause(s) Fault Locating Procedure Corrective Action(s)

ubleshooting Gui

Symptom

5. Pump runs a. Bleed handle on hose a. Listen for escaping air. a. Close bleed handle as continuously. isolation valve open. necessary.

b. Insufficient high-pressure air.

b. Ensure filtered air inlet b. If filtered air inlet pressupressure gauge (AHP-G204) reads at least

re gauge (AHP-G204) does not read at least 2,000 psi, proceed to Table 5-2. 2,000 psi.

c. Clogged in-line filter. c. Ensure filtered air high c. Replace in-line filter IAW pressure relief valve (AHP-V207) is not venting.

paragraph 6.6.12.

d. Filtered air high-pressure relief valve

d. Observe pressure on filtered air outlet

d. Reset filtered air high pressure relief valve

(AHP-V207) set incorrectly.

pressure gauge (AHP-G203) should relieve at 5,300 psig and reseat at 4,900 psig.

(AHP-V207) IAW MRC 36M-1.

e. Filtered air high-p(AHP-V207) leaking.

e. Listen for air leakage. e. Replace filtered air high pressure relief valve (AHP-V207) IAW paragraph 6.6.8.

ressure relief valve

P-ly

ure f. HP-f. Pilot switch (AHV205) set incorrect . relief valve (AHP-

V207) relieving.

f. Filtered air high press Adjust pilot switch (AV205) IAW paragraph 6.6.6.

a. Leakage at shut off valves.

age at valve stem. a. Leak a. Adjust packing IAW paragraph 6.6.4.b or 6.6.7.b.

6. rd.

of IAW paragraph 6.5.1;

tighten fittings or replace components as necessary.

Escaping air hea

b. Leakage at fitting. b. Isolate general area leakage.

b. Perform system tightness test

a. Drive air regulator (AHP-V201dam

) seat age.

201). ir bleed

valve (ALP-V204), adjust regulator to 125

a. Unload drive air regulator (AHP-VOpen drive a

psig.

a. Replace drive air regulator IAW paragraph 6.6.2.

7. Continuous flowfrom drive air relvalve (ALP-V 20

ief 2)

alve LP-V202) seat

damage.

air pressure gauge (ALP-G202) reads 125 psig.

b. Drive air relief v(A

b. Verify regulated b. Replace drive air relief valve (ALP-V202) IAW paragraph 6.6.3.

S6226-PD-MMO-010

5-4 Revision 1

A Tr s.

e Cause(s) edure

Table 5-2. HPF oubleshooting Guideline

Symptom Possibl Fault Locating Proc Corrective Action(s) a. Ship high-pre

system valve(s) closed.

ssure ai e ar a. Ensure high-pressuris available.

ir a. Ensure Ship high-pressure air system valve(s) is/are open.

b. Ensure check valve (AHP-V303) is not

.

check P-V303) to

w

b. Remove check valve (AHP-V303) and reinstall

installed backward

b. Visually inspect valve (AHensure directional arrois pointing toward endframe with manifold block.

of

IAW paragraph 6.7.4.

HPFA pressure indicator (AHP-G301)not operational

HP-

ter cartridges clogged.

edm

auge. d. Replace filter cartridges

IAW paragraph 6.7.2. If cartridge has ruptured,

ntact ISEA IAW paragraph 4.6.

c. HPFA gauge (AG301) failed.

d. Fil

c. Open shutoff and blevalves to verify systeis pressurized.

d. Not applicable.

c. If gauge does not register pressure, replace HPFA g

remove HPFA from service and co

Quick disconnects wilnot connect to the HPFA.

ssure s.

HP-P

is off

valve (AHP-V301); open

lve (AHP-V302) and bleed. If system is not under pressure, replace quick disconnects.

l HPFA is under preup to quick disconnect

Open drain valve (AV305) or bleed valve (AHV302) and close if air escapes system

-If system is under pressure, close Ship high-pressure air system valve(s) and shut

pressurized drain valve (AHP-V305) or bleed va

Escaping air heard. Leakage at fitting. Perform system tightness test

Isolate general area ofleakage. IAW paragraph 6.5.1; tighten

fittings or replace componentsas necessary.

S6226-PD-MMO-010

Revision 1 6-1

CORRECTIVE MAINTENANCE

6.1 INTRODUCTION

CHAPTER 6

.

6.1.1 Scope. The correcti mation presented in this chapter includes the actions and p ocedures required to re ned B ing BACS), hereinafter referred to as BACS, equipment to ition. T general maintenance information and specific maintena ssist mainremoval and replacement of inoperative parts or assemb orrective maintenance procedures identify maintenance actions; prov is s; ainstructions with supporting illustrations. The correctiv dures in rovided for qualified maintenance personnel working at the org

The information in the re ter is a g seq

• Safety Requirements

• General Maintenance Information

• Test Equipment and Tools

• Materials Required

• General Maintenanc

• Corrective Maint

6.1.2 Safety Requiremen

ve maintenance inforr store the Self-Contai reathing Apparatus Breath

a fully operable condnce procedures to alies. The c

Air Charging System (SCBAhis chapter provides bothtenance personnel in the

ide safety precautions; l t tools, parts, and materiale maintenance proceanizational level.

nd present step-by-step this chapter are p

mainder of this chap

rranged in the followin uence:

e Procedures

enance

ts. Before performing co ce on the personnel shall review and become thoroughly familiar with the general safety notices and precautions listed i R s, a ar be read in full before beginning corrective maintenance.

6.2 GENERAL MAINT TIO

rrective maintenan BACS, maintenance

n the Safety Summary. eplacement procedure long with the associated w nings and cautions, shall

ENANCE INFORMA N.

WARNING

Omission this equip

on or rmance o nce procedureesult in eq d serious injury or

death to personnel.

If in do ab e it Worn or damaged parts shall be replaced with authorized rparts only. ent failure during operations may result injury or death to personnel.

Do not use trisodium phosphate (TSP) for cleaning High-Pressure Filter Assembly (HPFA) or Air Booster Pump Assembly (ABPA) aluminum components. Use may result in equipment failure and serious injury or death to personnel.

negligent perfoment could r

f corrective maintenauipment failure an

s

ubt about the service

Compon

ility of a part, replac immediately. eplacement

in serious

S6226-PD-MMO-010

6-2 Revision 1

.2.1 Maintenance Parts6 . The parts location illustrations referenced in paragraph 6.6 and 6.7 identify the arts affected by the maintenance process. Only approved replacement parts listed in Chapter 7 shall be used

on the BACS. Ensure all repla raph 4.7.2.

.2 Related Maintenance

pcement components have been cleaned IAW parag

6.2 . Related corrective maintenance actions may include inspection, removal, and replacemen s, as well a eanin ing inand r cedures a 4 r 4detec ubrica anliness of s maintained at arequi graph 4.7.2.

6.3 TEST EQUIPMENT AND

t of O-ring s inspection and cl g of component parts. O-r spection, removal, eplacement protion compounds and lrements in para

re provided in paragraphnts. Ensure cle

.7.6. Also, refer to Chapte the system i

for approved leak-ll times IAW the

TOOLS.

An SCBA cylinder assembly filled to 4,500 psig are require orrective maintenance on the BACS. Table 6-1 lists each tool used in this chapter, its National Stock Number (NSN), and the component(s) on which it is used.

6-1. Tools

enclature NSN

d as test equipment for c

Table Required.

NomAssembly, SCBA cylinder, 4,500 psig * Adapter 1/4 in. Internal, 3/8 in. External 5120-00-224-9219 Crowfoot, 1 3/8 in., 3/8 in. drive 5120-00-181-6757 Driver, nut 3/8 in. 5120-01-430-5886 Driver, 59 nut 5/16 in. 5120-01-430- 00 Handle, ratchet, 3/8 in. drive 335-075120-01- 29 Kit, O-ring extractor 0-00-624-71512 90 Screwdriver, flat-tip, 1/4 in. 5120-00-222-8852 Screwdriver, Phillips, No. 2 5120-00-234-8913 Socket, 7/16 in., 3/8 in. drive 5120-01-430-7594 Socket, /8 in. driv -430-77 1/2 in. deep well, 3 e 5120-01 10 Socket, 9/16 in. deep well, 3/8 in. dr 5120-01-430-76ive 76 Spooler Valve, installation and removal tool P/N 80839-100 ** Torque Wrench, 0 to 100 in.-lb 5120-01-374-1926 Wrench, Allen, Set 5120-00-935-4641 Wrenches, Allen, 1/8 in., qty 2 5120-00-240-5292 Wrench, adjustable 5120-00-240-5336 Wrench, open end, 1-1/4 in. 5120-01-335-1220 Wrench, open end, 1-1/8 in. 5120-01-335-1219 Wrench, open end, 15/16 in. to 1 in., Qty 2 5120-00-277-7025 Wrench, open end, 11/16 in. to 13/16 in., Qty 2 5120-00-277-8300 Wrench, open end, 3/4 in. to 7/8 in. 5120-00-240-5609 Wrench, open end, 9/16 in. to 5/8 in., Qty 2 5120-00-187-7126 Wrench, strap 5120-01-461-1810

*Use existing SCBA cylinder assembly **Cage Code 2N386

S6226-PD-MMO-010

Revision 1 6-3

Table 6-2. T ontinued)

Wrench, open end, 3/8 in. to 7/16 in., Qty 2 5120-00-277-2342

ools Required. (C

Wrench, open end, 11/32 in. 5120-00-277-2341 Wrench, open end, 1 1/16 in. 5120-00-398-9156

6.4 MATERIALS REQUIRED.

Table 6-2 lists the materials necessary for performing corrective maintenance on the SCBA. The table alsincludes the National Stock Number (NSN) for each item and the purpose for its use.

o

Table 6-2. Materials Required.

lature NSN Purpose

Nomenc

Co D, Type I 6850-01-335-5042 Leak identification mpound, leak detection, MIL-L-25567Tap 8030-00-889-3534 Pipe thread taping e, Anti-seize, MIL-T-27730A, Size 1S licone compound, MIL-S-8660i 6850-00-177-5094 O-ring lubrication

6.5 CEDURES GENERAL MAINTENANCE PRO .

WARNING

Disassembly of BACS components beyond the procedures described in this manual shall not be performed. Additional disassembly may cause component failure and result in serious injury or death to personnel.

6.5.1 System Tightness Test.

6.5.1.1 ABPA Tightness Test.

a. Tools, Parts, and Materials. Assembly, SCBA cylinder Compound, leak detection, MIL-L-25567D, Type I

(1) (2)

b. Procedure.

Pressurize system IAW setup and operating procedures in paragraphs 2.3.1 andsteps a through f.

(1) 2.3.2

(2)

(3)

(4) gs on the filtered air outlet pressure gauge (AHP-G203), filtered air inlet pressure gauge (AHP-G204), and drive air inlet pressure gauge (AHP-G201). Start 10-minute time check while proceeding with step (5).

Close drive air control valve (ALP-V203).

Close ship high-pressure air system valve(s).

Note pressure readin

S6226-PD-MMO-010

6-4 Revision 1

WARNING

Do not loosen or tighten fittings while system is under pressure. Failure to comply may result in equipment damage and serious injury or death to personnel.

(5) Apply leak detection compound to area of repair and look for bubbles. If bubbles are observed, end system tightness test, depressurize system IAW paragraph 2.3.2 steps y

orrective maintenance on affected component(s) IAW paragraph ss test.

he initial readings and the 10-minute readings (per gauge) are within 50 psig of each other, t ings (per gauge) are different by more than 50 psig repeat steps (4

(7) Shut down and disa IAW paragraphs 2.3.2 through dd and 2.3.3.

6.5.1.2 HPFA Tight

through dd, and perform c6.7. Repeat system tightne

(6) At the end of 10 minutes, note pressure reading on the filtered air outlet pressure gauge (AHP-G203), filtered air inlet pressure gauge (AHP-G204), and drive air inlet pressure gauge (AHP-G201). If t

he test is complete. If the read) through (6) until leak is detected.

ssemble system steps y

ness Test.

a. Tools, Parts, and Materials. pound, leak detec (1) Com tion, MIL-L-25567D, Type I

b. Procedure.

(1) Ensu -V305) is closed (clockwis valve (AHP-V301) is open

(2) Slowly open stem valve. Pressurize hip high-press

(3) Note HP-G301 time check while proc

WARNING

re drain valve (AHP e). Ensure shutoff fully (counterclockwise).

ship high-pressure air syure air system valve.

HPFA and close s

pressure reading on HPFA gauge (A ). Start 10-minute eeding with step (4).

Do not loosen or tighten fittings while system is u ailure to com ent damage and se ath to personnel.

(4) Appl air an If bubbles are obse ed ), and perform corrective ) IAW Chapter 6. Repeat system tightness test.

(5) At th inutes, note pressure reading on HPFA gauge (AHP-G301). If initial f the reading is not

nder pressure. Fply may result in equipm rious injury or de

y leak detection compound to area of rep d look for bubbles.rved, end system tightness test, and open ble

mponent(s valve (AHP-V302

maintenance on affected co

e end of 10 mreading and 10-minute reading are within 50 psig, the test is complete. Iwithin 50 psig, repeat steps (3) and (4) until leak is detected.

S6226-PD-MMO-010

Revision 1 6-5

(6) Close shut off valve (AHP-V301).

WARNING

Befor nsure all personnel stand clear to avoid serious injury or death to personnel from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator

tive eyewear and hearing protection to prevent personal injury.

d pressure from system. Close drain and bleed valves (AHP-V305 and AHP-V302).

ABPA CORRECTIVE MAINTENANCE

e opening bleed valves, e

must wear protec

(7) Open drain valve (AHP-V305) and bleed valve (AHP-V302) to blee

6.6 .

RWA NING

Before performing maintenance on e turned off and all pressure has been bled from the system. Accidental

ir may result in serious injury or

Before opening bleed valves, rsonnel stand clear to avoid serious injury or death to personnel from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator

CAUTION

the ABPA, ensur HP air source is

exposure to escaping high-pressure adeath to personnel.

ensure all pe

must wear protective eyewear and hearing protection to prevent personal injury.

To avoid damage to O-ring groove, remove O-rings only using fingers or the appropriate tool from an O-ring extractor kit.

.6.1 Booster Pump Removal and Installation6 .

a. Tools, Parts, and Materials. er, nut 5/16 in.

(2) Kit, O-ring extractor

(4) 8/2-111, CAGE 81349

ty 4

( (11) (12) (13) Wrench, open end, 1 in.

(1) Driv

(3) O-ring, PN M83248/2-010, CAGE 81349, qty 9 O-ring, PN M8324

(5) O-ring, PN M83248/2-904, CAGE 81349 (6) O-ring, PN M83248/2-906, CAGE 81349, q (7) O-ring, PN M83248/2-908, CAGE 81349 (8) Socket, 9/16 in. deep well, 3/8 in. drive (9) Screwdriver, Phillips, No. 2 10) Wrench, open end, 3/8 in.

Wrench, open end, 11/16 in. Wrench, open end, 7/8 in.

S6226-PD-MMO-010

6-6 Revision 1

(14) Wrench, open end, 15/16 in. (15) Wrench, open end, 1 1/16 in.

b. Removal.

WARNING

Bbin

nd

efore conducting maintenance on the ABPA, ensure all pressure has een bled from the system. Failure to comply could result in serious jury or death to personnel.

(1) Using 5/16 in. nut driver, remove eight bottom screws and eight washers securing front aback covers. Set hardware aside and open covers.

CAUTION

To avoid damage to gauges, use two wrenches when tightening or loosening tube assemblies.

e tube assemblies (1 - 2, Figure 6-1).

g Phillips head screw driver and 3/8 in. open end wrench remove loop clamp on tube assembly (3).

(4) nd wrenches remove tube assemblies (3, 4, and 5).

(6) Using 11/16 in. and 1 in. open end wrenches remove tube assembly (6).

(7) W paragraph 4.7.6.1.

(8) Using two 9/16 in. open end wrenches, remove four nuts (13), four bolts (14), and eight washers (15).

(9)

(10) mp at joints.

(11)

(12)

(

(14) able elbow (25).

(2) Using 11/16 in. and 1 in. open end wrenches, remov

(3) Usin

Using 11/16 in. and 1 in. open e

(5) Remove drive air relief valve IAW procedure 6.6.3 step b.

Remove O-rings (7 -12) IA

Carefully lift booster pump, with attached hardware, from frame.

Using 11/16 in. open end wrench, remove hardware (16 - 19) from booster pu

Using 11/16 in., 7/8 in., and 9/16 in. open end wrenches, remove positionable elbows (20 - 24).

Using the 7/8 in. or 15/16 in. open end wrench loosen tube nut (39) and disconnect tube nut (40).

13) Rotate tube assembly (41) in order to rotate banjo fitting (42) down a quarter turn.

Using 1 1/16 in. and 7/8 in. open end wrenches remove position

S6226-PD-MMO-010

Revision 1 6-7

( graph 4.7.6.1.

c. Installation

15) Remove O-ring (26 – 37) IAW para

.

(1) Install O-rings (26 - 37, Figure 6-1) IAW paragraph 4.7.6.2.

(2)

(3) s (20, 22, 23,

(4) Tighten jam nut on positionable elbow (20, 22, 23, and 24).

(5)

t tube nut (40) aligns with the banjo fitting (42).

(7) Using 7/8 in. or 15/16 in. open end wrench tighten tube nut (39 - 40).

NOTE

(8)

(9) Carefully position booster pump in frame.

(10) nuts (13).

(11)

(12) Using 11/16 in. open end wrench, connect tube assembly (6).

(13) Install the drive air relief valve IAW procedure 6.6.3 step c.

(14) d 5).

(15) Using Phillips head screwdriver and 3/8 in. open end wrench attach and tighten loop clamp assembly (not shown).

end wrench connect tube assemblies (1 and 2).

( /8 in. opened wrenches tighten positionable elbow (21 - 25) jam nuts.

( r nuts (13) and four bolts (14).

( .1.1.

( nut driver, install eight bottom screws and eight

Hand tighten positionable elbows (20 – 25) to booster pump.

Attach tube assembly (18) and couplings (16, 17, and 19) to positionable elbowand 24).

Rotate banjo fitting (42) up 1/4 turn to its original position.

(6) Rotate tube assembly (41) so tha

Ensure shims (2 each) are still in place.

Align shims (38) holes with frame assembly holes.

Install hardware and hand-tighten eight washers (15), four bolts (14), and four

Install O-rings (7 - 12) IAW paragraph 4.7.6.2.

Using 11/16 in. and 1 in. open end wrenches connect tube assemblies (3, 4, an

on tube assembly (3) to adjacent tube

(16) Using 11/16 in. open

17) Using 11/16 in. and 7

18) Using two 9/16’’ open end wrenches, tighten fou

19) Perform system tightness test IAW paragraph 6.5

20) Close front and back covers. Using 5/16 in. washers.

S6226

6-8 Revision 1

-PD-MMO-010

Figure 6-1. Booster Pump.

38

13

FROM 10FILTERED AIR INLET

(AHP-V206)

1

7

4

126

1514

8

2 PILOT SWITCHTO

TO

FILTERIN-LINE

30

3424

2026

2716

2128

17

29

3519 32

33

23

3637

25 18

11

5

DRIVE AIRFROM

(ALP-V203)CONTROL

3122

9

3

4139

4240

S6226-PD-MMO-010

Revision 1 6-9

.6.2 Drive Air tion6 Regulator (AHP-V201) Removal and Installa .

and Materials a. Tools, Parts, . (1) Driver, nut 5/16 in.

(3) Kit, O-ring extractor

(5) O-ring, PN M83248/2-010, CAGE 81349, Qty 5

(7) N M83248/2-906, CAGE 81349, Qty 2 (8) Screwdriver, flat-tip, 1/4 in.

(10) Wrench, adjustable ((12)((14)

b. Removal

(2) Handle, ratchet, 3/8 in. drive

(4) O-ring, PN M83248/2-008, CAGE 81349

(6) O-ring, PN M83248/2-904, CAGE 81349, Qty 2 O-ring, P

(9) Socket, 1/2 in. deep well, 3/8 in. drive

11) Wrench, open end, 9/16 in. Wrench, open end, 11/16 in. 13) Wrench, open end, 15/16 in. Wrench, open end, 1 in.

.

WARNING

Before cond nsure all pressure has comply could result in serious

n

rews and four washers securing back cover.

ir regulator (4).

(2) Using 11/16 in. open end wrenches, remove tube assembly (1) from drive air inlet.

(3)

CAUTION

ucting maintenance on the ABPA, ebeen bled from the system. Failure to i jury or death to personnel.

(1) Using 5/16 in. nut driver, remove four bottom scSet hardware aside and open cover.

NOTE

Leave positionable elbow (3, Figure 6-2) attached to drive a

Remove O-ring (2) IAW paragraph 4.7.6.1.

To avoid do

(4) Using 9/16 in. and 11/16 in. open end wrenches, remove tube assembly (5) from drive air inlet pressure gauge (AHP-G201) and positionable elbow (6).

(5) Remove O-ring (7) from tube assembly (5) IAW paragraph 4.7.6.1.

amage to gauges, use two wrenches when tightening or l osening tube assemblies.

NOTE

Leave positionable elbow (6) attached to drive air regulator (4).

S6226-PD-MMO-010

6-10 Revision 1

Figure 6-2. Drive Air Regulator (AHP-V201).

CAUTION

To avoid damage to gauges, use two wrenches when tightening or loosening tube assemblies.

(6) Using 9/16 in. and 11/16 in. open end wrenches, loosen tube assemblies (8 - 9) at regulated

air pressure gauge (ALP-G202) and drive air bleed valve (ALP-V204).

NOTE

Leave positionable tee (10) attached to drive air regulator (4).

(7) Using 9/16 in. and 11/1 nnect tube assemblies (8 - 9) at positionable tee (10).

6 in. open end wrenches, disco

S6226-PD-MMO-010

Revision 1 6-11

ctor (11) attached to drive air regulator (4).

end wrench, loosen connector (11) from connector going to

r (12) from knob (13).

( cket, unscrew nut (14) from inside knob

nut (15).

ar of panel.

ng 11/16 in. and 9/16 in. open end wrenches, remove two positionable elbows (3 and 6) drive air regulator (4).

(15) Remove and discard O-rings (17 - 20) IAW paragraph 4.7.6.1.

(16) Using 9/16 in. open end wrench, remove positionable tee (10) from drive air regulator (4).

(17)

(18) ch, remove connector (11) from drive air regulator (4).

(19)

c. Installation

NOTE

Leave conne

(8) Using 1 in. and 15/16 in. openfilter.

(9) Using 1/4 in. flat-tip screwdriver, pry plastic cove

10) Using 3/8 in. drive ratchet and 1/2 in. deep well so(13) and unscrew knob (13).

(11) Using adjustable wrench, remove panel

(12) Remove regulator (4) from re

(13) Remove spacer (16).

(14) Usifrom

Remove and discard O-rings (21 - 23) IAW paragraph 4.7.6.1.

Using 11/16 in. open end wren

Remove and discard O-ring (24) IAW paragraph 4.7.6.1.

.

(1)

(2) Using 11/16 in. open end wrench, install connector (11) in drive air regulator (4).

(3) Install O-rings (21 -23) on positionable tee (10) IAW paragraph 4.7.6.2.

(4) Hand-tighten positionable tee (10) on drive air regulator (4). Do not over-tighten.

(5) Install O-rings (17 - 20) IAW paragraph 4.7.6.2.

(6) t over-

(7) Install spacer (16) on drive air reg ) approximately 3/8 in. from end of threads.

(8) Han from rear of panel.

(10) Using 9/16 in. and 11/16 in. open end wrenches, install tube assemblies (8 - 9) onto LP-V204).

Install O-ring (24) on connector (11) IAW paragraph 4.7.6.2.

Hand-tighten two positionable elbows (3 and 6) on drive air regulator (4). Do notighten.

ulator (4

d-tighten panel nut (15) while holding drive air regulator (4) in place

(9) Using 1 in. and 15/16 in. open end wrenches, tighten connector (11).

regulated air pressure gauge (ALP-G202) and drive air bleed valve (A

S6226-PD-MMO-010

6-12 Revision 1

(11) Line up positionable tee (10).

(12) Using 9/16 in. and 11/16 in. open end wrenches, install tube assemblies (8 - 9) on positionable tee (10).

(13) Using 9/16 in. open end wrench, tighten jam nut on positionable tee (10) at drive air regulator (4).

(14) Install O-ring (7) IAW paragraph 4.7.6.2.

(15) Using 9/16 in. and 11/16 in. open end wrenches, install tube assembly (5) on positionable elbow (6).

CAUTION

To avoid damage to gauges, use two wrenches when tightening or loosening tube assemblies.

(16) Using 9/16 in. and 11/16 in. open end wrenches, install tube assembly (5) on drive air inlet pressure gauge (AHP-G201).

(17) Install O-ring (2) IAW paragraph 4.7.6.2.

(18) Using 11/16 in. open end wrenches, install tube assembly (1) on positionable elbow (3).

(19) Using 11/16 in. open end wrenches, connect tube assembly (1) to drive air inlet.

(20) Using 11/16 in. and 9/16 in. open end wrenches, tighten positionable jam nuts on elbows (3 and 6) at drive air regulator (4).

(21) Screw on knob (13).

(22) Adjust knob IAW step d.

d. Knob Adjustment

.

(1) If necessary, pry plastic cover ( ) from knob (13).

(2) Using 3/8 in. drive ratchet and 1/2 in. deep well socket and while holding knob (13), loosen

(3) Use fingers to unscrew nut (14) until two threads show on drive air regulator stem.

(5) Ensure drive air control valve (ALP-V203) and drive air bleed valve (ALP-V204) are closed.

(6) Perf

e sure gauge (ALP-G202) reads 125 to 135 psig.

12, Figure 6-2

nut (14) on drive air regulator (4).

(4) Using 1/4 in. flat-tip screwdriver, turn drive air regulator (AHP-V201) stem fully counterclockwise.

orm system tightness test IAW paragraph 6.6.1.

(7) Using 1/4 in. flat-tip screwdriver, adjust drive air regulator (AHP-V201) stem clockwisuntil regulated air pres

S6226-PD-MMO-010

Revision 1 6-13

(8) Turn knob (13) fully clockwise.

(9) Use fin

Ensure pressure indicated on regulated air pressure gauge (ALP-G202)

NOTE

(13) air bleed valve (ALP-V 204).

back cover. Using 5/16 in. nut driver, install four bottom screws and four washers.

.6.3 Drive Air

ger to position nut (14) against knob (13).

NOTE

remains at 125 to 135 psig.

(10) While holding knob (13), use 3/8 in. drive ratchet and 1/2 in. deep well socket to tighten nut(14).

(11) Turn knob (13) fully counterclockwise.

(12) Open drive air bleed valve (ALP-V204).

Regulated air pressure gauge (ALP-G202) should indicate 0 psig.

Bleed system and close drive

(14) Turn knob (13) fully clockwise.

(15) If regulated air pressure gauge (ALP-G202) does not indicate 125 to 135 psig, return to step d.(1) and repeat knob adjustment procedure.

(16) Install plastic cover (12) on knob (13).

(17) Perform system tightness test IAW paragraph 6.5.1.

(18) Close

6 Relief Valve (ALP-V202) Removal and Installation.

a. ools, Parts, and MaterialsT . (1) Driver, nut 5/16 in. (2) Kit, O-ring extractor (3) O-ring, PN M83248/2-908, CAGE 81349

(5) Wrench, open end, 1 in.

(7) Wrench, open end, 1-1/4 in.

b. Removal

(4) Tape, Anti-seize, MIL-T-27730, Size 1

(6) Wrench, open end, 1-1/8 in.

.

WARNING

Before conducting maintenance on the ABPA, ensure all pressure has

nbeen bled from the system. Failure to comply could result in serious i jury or death to personnel.

S6226-PD-MMO-010

6-14 Revision 1

ve four bottom screws and four washers securing back cover. Set hardware aside and open cover.

(2) rench, loosen tube assembly (6, Figure 6-3), connector (10), and coupling (1) to remove cross (8) with attached fittings.

(3) gs (2, 7, and 11) IAW paragraph 4.7.6.1.

apter (4)

In a

(1) Using 5/16 in. nut driver, remo

Using 1 in. open end w

Remove O-rin

(4) Using 1-1/8 in. and 1-1/4 in. wrenches, remove drive air relief valve (5) from adwhile holding adapter still, turning only drive air relief valve.

Figure 6-3. Drive Air Relief Valve (ALP-V202).

c. stall tion.

NOTE

Ensure adapter and drive air relief valve (ALP-V202) are free of Anti-seize tape.

Apply anti-seize tap (1) e to drive air relief valve (ALP-V202) IAW paragraph 4.7.4.

(2) Using 1-1/8 in. and 1-1/4 in. open end wrenches, install Drive Air Relief Valve (5, Figure 6-3) on adapter (4)

(3) Install O-ring (2, 7, and 11) IAW paragraph 4.7.6.2.

S6226-PD-MMO-010

Revision 1 6-15

ittings while using 1 in. open end wrench, tighten tube assembly (6), connector (10), and coupling (1).

(5) Perform system tightness test IAW paragraph 6.5.1.1.

(6)

6.6.4 Drive A 3) Removal and Installation

(4) Position cross (8) with attached f

Close back cover. Using 5/16 in. nut driver, install four bottom screws and four washers.

ir Control Valve (ALP-V20 .

T a. ools, Parts, and Materials. Comp (1) ound, leak detection, MIL-L-25567D, Type I

, Qty 2

(6) Wrench, open end, 7/16 in. (7) Wrench, open end, 7/8 in.

(8) W

b. P

(2) Driver, nut 5/16 in. (3) Kit, O-ring extractor (4) O-ring, PN M83248/2-111, CAGE 81349 (5) Wrench, Allen, 5/32 in.

rench, open end, 1 in.

acking Adjustment.

(1) Using 7/16 in. open end wrench hold packing nut (1, Figure 6-4) while using 7/8 in. open end wrench to loosen Bonnet (2).

Figure 6-4. Drive Air Co

(2) clockwise.

ntrol Valve (ALP-V203).

Using 7/16 in. open end wrench, tighten packing nut (1) approximately 1/8 turn

S6226-PD-MMO-010

6-16 Revision 1

time, proceed with step c.

c. R

(3) Using 7/16 in. open end wrench hold packing nut (1) while using 7/8 in. open end wrench to loosen tighten Bonnet (2).

(4) Apply leak detection compound to area of repair and look for bubbles. If bubbles are observed, repeat steps 1 - 4. If bubbles observed second

emoval.

WARNING

Before conducting maintenance on the ABPA, ensure all pressure has been bled from the system. Failure to comply could result in serious injury or death to personnel.

(1) Using 5/16 in. nut driver, remove four bottom screws and four washers securing back cover. Set hardware aside and open cover.

(2) Using 5/32 in. Allen wrench, loosen set screw (3, Figure 6-4).

(3) Remove handle (4).

(4) Using 7/16 in. open end wrench hold packing nut (1) while using 7/8 in. open end wrench to remove Bonnet (2).

(5) Using 1 in. open end wrench, disconnect tube assembly (5) and coupler (6).

(6) Holding drive control air valve (7) from rear of panel, remove panel nut (8) with 1 in. open end wrench.

(7) Remove drive air control valve (7).

(8) Remove O-rings (9 - 10) IAW paragraph 4.7.6.1.

d. Installation.

(1) Install O-rings (9 - 10, Figure 6-4) on dr .2.

NOTE

Arrow should point toward tube assembly (5).

(2) Noting direction of arrow, insert d (7) through rear of panel and hand-

(5) en tube assembly (5) and coupler (6).

ive air control valve (7) IAW paragraph 4.7.6

rive air control valvetighten panel nut (8).

(3) Hand-tighten tube assembly (5) and coupler (6).

(4) Using 1 in. open end wrench, tighten panel nut (8).

Using 1 in. open end wrench, tight

(6) Hand-tighten bonnet (2).

S6226-PD-MMO-010

Revision 1 6-17

h to

oes not rotate on drive air control valve (7) stem.

(

( 1.

( 6 in. nut driver, install four bottom screws and four washers.

.6.5 Drive Air ) Removal and Installation

(7) Using 7/16 in. open end wrench hold packing nut (1) while using 7/8 in. open end wrenctighten Bonnet (2).

(8) Install handle (4).

(9) Align pin (11) with indent in drive air control valve (7) stem.

NOTE

Ensure handle (4) d

10) Using 5/32 in. Allen wrench, secure set screw (3).

11) Perform system tightness test IAW paragraph 6.5.

12) Close back cover. Using 5/1

6 4Bleed Valve (ALP-V20 .

rials a. Tools, Parts, and Mate . 6 in.

(4) (5) Wrench, open end, 11/16 in. (6) Wrench, open end, 1 in.

b. Removal

(1) Driver, nut 5/1 (2) Kit, O-ring extractor (3) O-ring, PN M83248/2-010, CAGE 81349

Wrench, Allen, 3/32 in.

.

WARNING

Before conducting maintenance on the ABPA, ensure all pressure has been bled from the system. Failure to comply could result in serious injury or death to personnel.

(1) Using 5/16 in. nut driver, remove four bottom screws and four washers securing back cover. Set hardware aside and open cover.

(2) Using 11/16 in. open end wrench, disconnect tube assembly (1, Figure 6-5).

(3) Using 3/32 in. Allen wrench, loosen set screw (2).

(4) Remove handle (3) from front of panel.

(5) While holding drive air bleed valve (4) on underside of panel, remove panel nut (5) using 1 in. open end wrench.

S6226-PD-MMO-010

6-18 Revision 1

Figure 6-5. Drive Air Bleed Valve (ALP-V204).

(6) Remove drive air bleed valve (4).

(7) g (6) IAW paragraph 4.7.6.1.

In a

Remove O-rin

c. stall tion.

(1) Install O-ring IAW paragraph 4.7.6.2.

NOTE

(2) Hold drive air bleed valve (4, Fig n place through front panel, while placing handle (3) on ion of drive air bleed valve (4).

(3) d hand-tighten panel nut (5).

embly (1).

ragraph 6.5.1.1.

(9) Close back cover. Using 5/16 in. nut driver, install four bottom screws and four washers.

Handle (3) should rotate in direction of arrow on front panel when oriented correctly.

ure 6-5) i drive air bleed valve (4) to ensure correct orientat

Remove handle (3) an

(4) Using 11/16 in. open end wrench, tighten tube ass

(5) Using 1 in. open end wrench, tighten panel nut (5).

(6) Using 3/32 in. Allen wrench, install handle (3) with set screw (2).

(8) Perform system tightness test IAW pa

S6226-PD-MMO-010

Revision 1 6-19

.6.6 Pilot it6 Sw ch (AHP-V205) Removal and Installation.

a. Tools, Parts, and Materials. ylinder

(2) Driver, nut 5/16 in.

(4) Kit, O-ring extractor (5) O-ring, PN M83248/2-010, CAGE Qty 3 (6) S (7) S

(1) Assembly, SCBA c

(3) Handle, ratchet, 3/8 in. drive

81349,crewdriver, Phillips, No. 2 ocket, 7/16 in., 3/8 in. drive

(8) Tape, Anti-seize, MIL-T-27730, Size 1 (9) Wrenches, Allen, 1/8 in., Qty 2 (10) Wrench, open end, 7/16 in. (11) Wrench, open end, 9/16 in. (12) Wrench, open end, 11/16 in. (13) Wrench, open end, 1 in.

b. Adjustment.

(1) Perform setup and operating procedures IAW paragraphs 2.3.1 and 2.3.2 steps a through g.

nd filtered air inlet valve (AHP-V206).

ver, loosen two screws (4, Figure 6-6).

(2) Close drive air control valve (ALP-V203) a

(3) Using No. 2 Phillips screwdri

Figure 6-6. Pilot Switch (AHP-V205).

S6226-PD-MMO-010

6-20 Revision 1

(4) Rotate identification plate (2).

(5) Using two 1/8 in. Allen wrenches, hold collar (1) (closest to spring) in place while rotating collar (3) left 1/4 turn.

(6) Using 1/8 in. Allen wrench, rotate collar (1) (closest to spring) right to increase pressure and left to decrease pressure.

(7) Open SCBA cylinder valve and corresponding Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102). Ensure filtered air outlet pressure gauge (AHP-G203) reading is less than 2,000 psig.

(8) To test new setting and begin operation of the booster pump, open filtered air inlet valve (AHP-V206) and drive air control valve (ALP-V203) 4 to 6 complete turns.

(9) When booster pump stops operating, ensure the pressure reading on the filtered air outlet pressure gauge (AHP-G203) is within the target range of 4,450 to 4,550 psig. If reading is outside this range, return to step (6).

(10) Using two 1/8 in. Allen wrenches, hold collar (4) (closest to spring) in place while tightening collar (3) (furthest from spring) to the right.

Target adjustment is 4,450 to 4,550 psig.

(11) the pressure reading on the filtered air outlet get range of 4,450 to 4,550 psig. If reading is

ange, return to step (6).

(12) and using No. 2 Phillips screwdriver, secure with

c. Removal

NOTE

When booster pump stops operating, ensure pressure gauge (AHP-G203) is within the taroutside this r

Rotate identification plate (2) into place two screws (1).

.

WARNING

Bbeen bled from the system. Failure to comply could result in serious injury or death to personnel.

ashers securing front and

7).

connector (15) and elbow (13).

efore conducting maintenance on the ABPA, ensure all pressure has

(1) Using 5/16 in. nut driver, remove eight bottom screws and eight wback covers. Set hardware aside and open covers.

NOTE

Only disconnect, but do not remove tube assemblies (5 and

(2) Using 11/16 in. wrench, disconnect tube assemblies (5 and 7, Figure 6-6) from

S6226-PD-MMO-010

Revision 1 6-21

sembly (6).

nd wrench and 3/8 drive ratchet with 7/16 in. socket, remove three nuts mounting bolts (8), and pilot switch (11).

h, remove elbows (12 - 13).

).

ch, remove connector (15).

aragraph 4.7.6.1.

elbows (12 - 13) and plug (14).

d. I a

(3) Using 11/16 in. open end wrench, remove tube as

(4) Using 7/16 in. open e(9), six washers (10), three

(5) Using 9/16 in. open end wrenc

(6) Using 7/16 in. open end wrench, remove plug (14

(7) Using 11/16 in. open end wren

(8) Remove O-rings (16 - 19) IAW p

(9) Remove anti-seize tape from

nstall tion.

NOTE

4.7.4.

in NC port.

(3) Noting orientation in Figure 6-6, use 9/16 in. open end wrench to install elbows (12 - 13) on pilot switch (11).

(4) Install O-rings (16- 19) IAW paragraph 4.7.6.2.

(5) Using 11/16 in. open end wrench, install connector (15) on pilot switch (11).

(6) Hand-tighten pilot switch (11) on panel using three mounting bolts (8), six washers (10), and three nuts (9).

(7) Position pilot switch (11) and using 11/16 in. open end wrench, tighten tube assemblies (5 - 7) to elbows (12 - 13) and connector (15).

(8) Using 7/16 in. open end wrench and 3/8 in. drive ratchet with 7/16 in. socket, secure three mounting bolts (8).

(9) Perform system tightness test IAW paragraph 6.6.1.

(10) Verify pressure settings IAW step b.

(11) Close front and back covers. Using 5/16 in. nut driver, install eight bottom screws and eight washers.

Filtered Air Inlet Valve (AHP-V206) Removal and Installation

Ensure elbows and pilot switch (AHP-V305) are free of Anti-seize tape.

(1) Apply Anti-seize tape on elbows (12 - 13, Figure 6-6) and plug (14) IAW paragraph

(2) Using 7/16 in. open end wrench, install plug (14) on pilot switch (11)

6.6.7 .

Tools, Parts, and Materia a. ls. (1) Driver, nut 5/16 in.

S6226-PD-MMO-010

6-22 Revision 1

(3) O-ring, PN M83248/2-010, CAGE 81349, Qty 2

(5) 08, CAGE 81349 (6) Wrench, Allen, 1/8 in.

(8) in. (9) Wrench, open end, 3/4 in.

(

b. Packin

(2) Kit, O-ring extractor

(4) O-ring, PN M83248/2-111, CAGE 81349, Qty 2 O-ring, PN M83248/2-9

(7) Wrench, open end, 3/8 in. Wrench, open end, 11/16

10) Wrench, open end, 1 in.

g Adjustment.

(1) Using 3/8 in. open end wrench hold packing nut (1, Figure 6-7) while using 11/16 in. openend wrench to loosen bonnet (2).

(3) acking nut (1) while using with 11/16 in. open end wrench to tighten Bonnet (2).

(4) justment and look for bubbles. If bubbles are observed, repeat steps (1) through (4). If bubbles are observed a second time, proceed with step c.

(2) Using 3/8 in. open end wrench, tighten packing nut (1) approximately 1/8 turn clockwise.

Using 3/8 in. open end wrench, hold p

Apply leak detection compound to area of ad

Figure 6-7. Filtered Air Inlet Valve (AHP-V206).

S6226-PD-MMO-010

Revision 1 6-23

R c. emoval.

WARNING

Before cond e has

injury or death to personnel.

-7) connector (4), and

IAW paragraph 4.7.6.1.

(4) Using 1/8 in. Allen wrench, loosen set screw (10).

(5) Remove handle (11).

(8) r inlet valve (14) from rear of panel, remove panel nut (15) with 3/4 in.

(

d. Installation

ucting maintenance on the ABPA, ensure all pressurbeen bled from the system. Failure to comply could result in serious

(1) Using 5/16 in. nut driver, remove four bottom screws and four washers securing back cover. Set hardware aside and open cover.

(2) Using 1 in. open end wrench, loosen tube assembly (5, Figure 6coupling (3) to remove cross (6) with attached fittings.

(3) Remove O-rings (7 - 9)

(6) Using 3/8 in. open end wrench hold packing nut (1) while using 11/16 in. open end wrench to remove Bonnet (2).

(7) Using 11/16 in. open end wrench, loosen tube assembly (12) and coupling (13).

Holding filtered aiopen end wrench.

(9) Remove filtered air inlet valve (14).

10) Remove O-rings (16 - 17) IAW paragraph 4.7.6.1.

.

(1) Install O-rings (16 - 17, Figure 6-7) IAW paragraph 4.7.6.2.

NOTE

Arrow should point toward tube assembly (12).

e (14) through rear of panel and hand-

(4) in. open end wrench, tighten panel nut (15).

13).

Hand-tighten bonnet (2).

(2) Noting direction of arrow, insert filtered air inlet valvtighten panel nut (15).

(3) Hand-tighten tube assembly (12) and connector (13).

Using 3/4

(5) Using 11/16 in. open end wrench, tighten tube assembly (12) and connector (

(6)

S6226-PD-MMO-010

6-24 Revision 1

wrench hold packing nut (1) while using 11/16 in. open end wrench

.

NOTE

s not rotate on filtered air inlet valve (14) stem.

llen wrench, secure with set screw (10).

(

(

(

(

6.6.8 Surge Ta

(7) Using 3/8 in. open endto tighten Bonnet (2).

(8) Install handle (11).

(9) Align pin (18) with indent in filtered air inlet valve (14) stem

Ensure handle (11) doe

(10) Using 1/8 in. A

11) Install O-rings (7 - 9) in cross (6) IAW paragraph 4.7.6.2.

12) Position cross (6) with attached fittings while using 1 in. open end wrench tighten tube assembly (5), connector (4), and coupling (3).

14) Perform system tightness test IAW paragraph 6.5.1.1.

15) Close back cover. Using 5/16 in. nut driver, install four bottom screws and four washers.

nk and Filtered Air Relief Valve (AHP-V207) Removal and Installation.

a. Tools, Parts, and Materials. (1) Driver, nut 5/16 in. (2) Kit, O-ring extractor (3) O-ring, PN M83248/2-010, CAGE 81349 (4) O-ring, PN M83248/2-906, CAGE 81349, Qty 2 (5) Wrenches, open end, 7/16 in., qty. 2 (6) Wrench, open end, 5/8 in. (7) Wrench, open end, 11/16 in. (8) Wrench, open end, 13/16 in.

b. Removal.

WARNING

Before conducting maintenance on the ABPA, ensure all pressure has been bled from the system. Failure to comply could result in serious injury or death to personnel.

(1) Using 5/16 in. nut driver, remove four bottom screws and four washers securing front cover. Set hardware aside and open cover.

(2) Using 11/16 in. open end wrench, disconnect tube assembly (1, Figure 6-8) from positionable elbow (2).

S6226-PD-MMO-010

Revision 1 6-25

lt (5). Repeat for remaining three bolts (5).

ositionable elbow (2) attached, slide out surge tank (6).

ir relief valve (7) from surge tank (6).

ve O-ring (8) IAW paragraph 4.7.6.1.

If only replacing filtered air relief valve (AHP-V207), proceed to paragraph 6.7.8.c step 3.

(7) Using 11/16 in. wrench, remove positionable elbow (2) from surge tank (6).

(8) ) IAW paragraph 4.7.6.1.

In a

Figure 6-8. Surge Tank with Filtered Air Relief Valve (AHP-V207). (3) Using two 7/16 in. open end wrenches, loosen both clamps (3) by holding nut (4) on back

while loosening bo

(4) With filtered air relief valve (7) and p

(5) Using 13/16 in. open end wrench, remove filtered a

(6) Remo

NOTE

Remove O-rings (9 - 10

c. stall tion.

(1) Install O-rings (9 -10, Figure 6-8) IAW paragraph 4.7.6.2.

valve (7).

(4) Using 13/16 in. open end wrench, install filtered air relief valve (7) on surge tank (6).

(2) Using 11/16 in. open end wrench, install positionable elbow (2) on surge tank (6).

(3) Install O-ring (8) on filtered air relief

S6226-PD-MMO-010

6-26 Revision 1

WARNING

When reposi red air relief valve (7) is

(5) Position surge tank (6) so filtered valve (7) discharge is positioned downward.

(6)

tighten using 11/16 in. open end wrench.

(8) Hold positionable elbow (2) with 5/8 in. open end wrench, while tightening positionable

(9) Using two 7/16 in. open end wrenches, tighten both clamps (3) by holding nut (4) on back olts (5).

ashers.

ge (AHP-G201), Regulated Air Pressure Gauge (ALP-G202),

tioning the surge tank, ensure filtepositioned properly to avoid serious injury or death to personnel.

air relief

Align positionable elbow (2) toward tube assembly (1).

(7) Connect tube assembly (1) to positionable elbow (2) and

elbow (2) to surge tank (6).

while tightening bolt (5). Repeat for remaining three b

(10) Perform system tightness test IAW paragraph 6. 5.1.1.

(11) Close front cover. Using 5/16 in. nut driver, install four bottom screws and four w

6.6.9 Drive Air Inlet Pressure Gaua d A r Inlet Pressure Gand Filtere i uge (AHP-G204) Removal and Installation.

T a. ools, Parts, and Materials. (1) Driver, nut 5/16 in. (2) Kit, O-ring extractor (3) O-ring, PN M83248/2-008, CAGE 81349

(6) Wrench, open end, 11/16 in.

b. Removal

(4) Wrench, open end, 11/32 in. (5) Wrench, open end, 9/16 in.

.

WARNING

Before conducting maintenance on the ABPA, ensure all pressure has been bled from the system. Failure to comply could result in serious injury or death to personnel.

(1) r bottom screws and four washers securing back cover. Set hardware aside and open cover.

CAUTION

Using 5/16 in. nut driver, remove fou

To avoid damage to gauges, use two wrenches when tightening or loosening tube assemblies.

S6226-PD-MMO-010

Revision 1 6-27

(2) Using 9/16 in. and 11/16 in. open end wrenches, remove tube assembly (1, Figure 6-9) from gauge (2) requiring corrective maintenance.

Figure 6-9. Driv sure Gauge (ALP-G202), and Filtered Air Inlet Pressure Gauge (AHP-G204)

(3) Using 11/32” open end wrench, remove mounting bracket nuts (3) and bracket (4). Set

(5) Remove O-ring (5) IAW paragrap .

c. Instal

e Air Inlet Pressure Gauge (AHP-G201), Regulated Air Pres

aside.

(4) Remove gauge (2) from front of panel.

h 4.7.6.1

lation.

NOTE

Ensure gauge to be installed is within calibration.

(1) Using 11/32 in. open end wrench, remove and examine mounting studs (6) to identify long ort ends.

from gauge (2).

and sh

(2) Reinstall mounting studs (6) with long ends protruding out

(3) Install O-ring (5) IAW paragraph 4.7.6.2.

(4) Hand-tighten tube assembly (1) to gauge (2).

S6226-PD-MMO-010

6-28 Revision 1

CAUTION

To avoid damage to gauges, use two wrenches when tightening or loosening tube assemblies.

(5) Position bracket (4) in place while using 11/32” open end wrench to secure mounting bracket nuts (3). Do not over tighten.

(6) Using 9/16 in. and 11/16 in. open end wrenches, tighten tube assembly (1).

6.6.10 Filtered ge (AHP-G203) Removal and Installation

(7) Perform system tightness test IAW paragraph 6. 5.1.1.

(8) Close back cover. Using 5/16 in. nut driver, install four bottom screws and four washers.

Air Outlet Pressure Gau .

T a. ools, Parts, and Materials. Driver, nut 5/16 in. (1)

(2) Driver, nut 3/8 in. (3) Kit, O-ring extractor (4) O-ring, PN M83248/2-008, CAGE 81349 (5) Screwdriver, Phillips, No. 2 (6) Wrench, open end, 9/16 in. (7) Wrench, open end, 11/16 in.

b. Removal.

WARNING

Before conducting maintenance on the ABPA, ensure all pressure has re to comply could result in serious

injury or death to personnel.

(1) Using 5/16 in. nut driver, remove four bottom screws and four washers securing back cover. Set hardware aside and open cover.

CAUTION

been bled from the system. Failu

To avoid damage to gauges, use two wrenches when tightening or loosening tube assemblies.

(2) Using 9/16 in. and 11/16 in. open end wrenches, remove tube assembly (1, Figure 6-10) from filtered air outlet pressure gauge (2).

S6226-PD-MMO-010

Revision 1 6-29

Figure 6-10. Filtered Air Outlet Pressure Gauge (AHP-G203).

(3) Hold nut (3) on underside of panel with 3/8 in. nut driver, while removing screw (4) and

(5) Remove O-ring (6) IAW paragraph 4.7.6.1.

c. Installation

washer (5) on face of filtered air outlet pressure gauge (2) with No. 2 Phillips screwdriver. Repeat for remaining two screws.

(4) Remove filtered air outlet pressure gauge (2) from front of panel.

.

NOTE

filtered air outlet pressure gauge (AHP-G203) to be installed is within calibration.

(1) Install O-ri

iltered air outlet pressure gauge (2).

screwdriver to install screw (4), washer (5), and gauge nut (3). Repeat for two remaining screws.

NOTE

To avoid d loosening tube assemblies.

Ensure

ng (6) IAW paragraph 4.7.6.2.

(2) Position filtered air outlet pressure gauge (2) through front of panel and hand-tighten tube assembly (1) to f

(3) Using 3/8 in. nut driver, hold gauge nuts in place while using No. 2 Phillips

amage to gauges, use two wrenches when tightening or

S6226-PD-MMO-010

6-30 Revision 1

(4) Using 9/16 in. and 11/16 in. open end wrenches, tighten tube assembly (1).

(5) Perform system tightness test IAW paragraph 6. 5.1.1.

(6) 16 in. nut driver, install four bottom screws and four washers.

.6.11 Dri i

Close back cover. Using 5/

6 ve A r Filter Removal and Installation.

a. Tools, Parts, and Materials.

(2) Driver, nut 3/8 in.

(4) O-ring, PN M83248/2-111, CAGE 81349

(6) Wrench, open end, 15/16 in.

(1) Driver, nut 5/16 in.

(3) Kit, O-ring extractor

(5) O-ring, PN M83248/2-908, CAGE 81349

(7) Wrench, open end, 1 in.

b. Removal.

WARNING

B ance on theefore conducting mainten ABPA, ensure all pressure has re to comply could result in serious

injury or death to personnel.

ng 5/16 in. nut driver, remove four bottom screws and four washers securing back cover. Set hardware aside and open cover.

(2) Using 1 in. open end wrench, disconnect connectors (1 and 2, Figure 6-11).

been bled from the system. Failu

(1) Usi

Figure 6-11. Drive Air Filter.

S6226-PD-MMO-010

Revision 1 6-31

(3) Remove drive air filter (3) with connectors (4 and 5) attached.

(4) Using 15/16 in. open end wrench, remove connectors (4 and 5) from drive air filter (3).

(5) Remove O-rings (6 - 7) IAW paragraph 4.7.6.1.

(6) Remove anti-seize tape from connectors (4 and 5).

c. Installation.

(1) Apply anti-seize tape to connectors (4 and 5) IAW paragraph 4.7.4.

(2) Using 5/16 in. open end wrench, install connectors (4 and 5) in drive air filter (3).

(3) Install O-rings (6 and 7) IAW paragraph 4.7.6.2.

NOTE

Flow arrow should point toward connector (1).

(4) Noting direction of flow arrow, install drive air filter (3) with attached fittings using 1 in. open end wrench.

(5) Perform system tightness test IAW paragraph 6. 5.1.1.

(6) Clo nd four washers.

.6.12 In-L F

se back cover. Using 5/16 in. nut driver, install four bottom screws a

6 ine ilter Removal and Installation.

Parts, and Materials a. Tools, . (1) Driver, nut 5/16 in.

(3) O-ring, PN M83248/2-010, CAGE 81349, Qty 2 ty 2

(5) Wrench, open end, 9/16 in. ch, open end, 11/16 in.

(7) Wrench, open end, 1 in.

b. Remo

(2) Kit, O-ring extractor

(4) O-ring, PN M83248/2-906, CAGE 81349, Q

(6) Wren

val.

WARNING

Before conducting maintenance on the ABPA, ensure all pressure has een bled from the system. Failure to comply cob uld result in serious

injury or death to personnel.

(1) k cover. Set hardware aside and open cover.

(2) d

Using 5/16 in. nut driver, remove four bottom screws and four washers securing bac

Using 11/16 in. open end wrench, disconnect tube assembly (1, Figure 6-12) anconnector (2).

S6226-PD-MMO-010

6-32 Revision 1

Figure 6-12. (3) Remove in-line filter (3) with adapters (2 and 4) attached.

(4) ith 9/16 in.

In a

In-Line Filter.

While holding filter with 1 in. open end wrench, remove connectors (2 and 4) wor 11/16 in. open end wrench.

(5) Remove O-rings (5 - 8) IAW paragraph 4.7.6.1.

c. stall tion.

(1) Install O-rings (5 - 8) IAW paragraph 4.7.6.2.

(2) Using 9/16 in., 11/16 in. and 1 in. open end wrenches, install connectors (2 and 4) on in-line filter (3).

NOTE

Ensure flow arrow points away from tube assembly (1).

(3) Noting direction of flow arrow, install in-line filter (3) with attached fittings to tube assembly (1) and tee (9) using 1 in. open end wrench.

(4) Perform system tightness test IAW paragraph 6.5.1.1.

(5) Close back cover. Using 5/16 in. nut driver, install four bottom screws and four washers.

6.6.13 Spooler Valve Assembly Removal and Installation.

a. Tools, Parts, and Materials . (1) Compound, silicone, MIL-S-8660 (2) Driver, nut 5/16 in. (3) Screwdriver, 1/4 in. flat tip

(4) Tool, Spooler Valve Installation and Removal

S6226-PD-MMO-010

Revision 1 6-33

(6) Wrench, torque, 0 to 100 in.-lb

(8) Wrench, open end, 15/16 in.

(10) Adapter, 1/4 in. internal, 3/8 in. external

(5) Wrench, open end, 7/8 in.

(7) Crow’s foot 1 3/8 in., 3/8 drive

(9) Wrench, adjustable

b. Removal.

WARNING

Before conducting maintenance on the ABPA, ensure all pressure has been bled from the system. Failure to comply could result in serious injury or death to personnel.

(1) Using 5/16 i ashers securing back cover.

(2) /16 in. open end wrench, loosen tube nuts (1, Figure 6-13), disconnect (5).

n. nut driver, remove four bottom screws and four wSet hardware aside and open cover.

Using 7/8 in. or 15tube nut (3). Reposition tube assembly (4) away from banjo fitting

Figure 6-13. Tube Assembly.

S6226-PD-MMO-010

6-34 Revision 1

(3) Using adjustable wrench, loosen banjo fitting hex nut (4, Figure 6-13) by rotating counterclockwise. Remove banjo fitting (5, Figure 6-14).

Figure 6-14. Banjo Fitting Hex Nut.

(4) e (6, Figure 6-14) and pull valve out of booster pump. Set aside.

nstallation and removal tool (8, Figure 6-16), locate a hole on the inside rt the pin. Hold the spooler valve installation and

Using fingers, grip spooler valv

Figure 6-15. Spooler Valve Assembly.

(5) Using the spooler valve iof the spooler valve sleeve (7) and inseremoval tool in place.

S6226-PD-MMO-010

Revision 1 6-35

Figure 6-16. Spooler Valve Installation and Removal Tool.

(6) Locate a point for leverage near the installation and removal tool to rest. Insert 1/4 in. flat tip screwdriver into a notch on the installation and removal tool (8, Figure 6-16), gently pry out.

(7) Discard the removed spooler valve assembly (8, Figure 6-15) and spooler valve sleeve (9, Figure 6-17).

Figure 6-17. Spooler Valve Sleeve.

S6226-PD-MMO-010

6-36 Revision 1

c. Installation.

CAUTION

Ensure spooler valve bumper and ring are in place. Failure to do so could result in lost parts and a malfunction in equipment.

(1) Inspect spooler valve cavity for spooler valve bumper and ring (9 and 10, Figure 6-17).

CAUTION

Spooler valve and spooler valve sleeve are matched set and are not interchangeable. Interchanging parts will cause equipment damage.

(2) Remove new spooler valve assembly (6) from new spooler valve sleeve (7).

(3) Lubricate exterior of spooler valve sleeve (7) with silicone compound MIL-S-8660.

CAUTION

Do not insert spooler val de spooler v

(4) ands, hold recessed end of spooler valve sleeve (7) and insert into booster pump.

(5) Using fingers, insert the new spooler valve (6, Figure 6-15) up into spooler valve sleeve (7, Figure 6-17).

(6) Lubricate spooler valve O-ring (10, Figure 6-15) with silicone compound MIL-S-8660.

(7) Align Banjo fitting (5, Figure 6-14) with tube (2, Figure 6-13) and hand tighten banjo fitting hex nut (4, Figure 6-13).

(8) Using the 1 3/8 in. crow’s foot and torque wrench, tighten the banjo fitting hex nut to 10 to 15 in.-lb.

(9) Using 7/8 in. or 15/16 in. open end wrench, install tube nut (3, Figure 6-13).

(10) Using 7/8 in. or 15/16 in. open end wrench, tighten tube nut (1, Figure 6-13)

(11) Perform Test Operate ABPA procedure IAW MRC Q-2.

(12) Close back cover ttom screws and four washers.

7 HPFA Corrective Maintenance

ve installation and removal tool insialve sleeve. Doing so could cause damage to equipment.

Using h

. Using 5/16 in. nut driver, install four bo

6. .

CAUTION

To avoid damage to O-ring groove, remove O-rings using fingers or O-ring Extractor Kit.

S6226-PD-MMO-010

Revision 1 6-37

6.7.1 Bleeding HPFA.

WARNING

Before performing maintenance on the HPFA, ensure high-pressure air source is turned off and all pressure has been bled from the system. Accidental exposure to escaping high-pressure air may result in serious injury or death to personnel.

Before opening bleed valves, ensure all personnel stand clear of area to avoid injury from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury.

a. Depressurize HPFA by closing ship high-pressure air system valve and opening shutoff valve (AHP-V301).

b. Slowly vent pressure from bleed valve (AHP-V302).

c. Note when HPFA gauge (AHP-G301) reaches nsure the HPFA is depressurized.

6.7.2 F r

zero and there is no sound of escaping air to e

ilte Removal and Installation.

a. Tools, Parts, and Materials. 1) Kit, O-ring extractor

) O-ring, PN M ( (3 83248/2-010, CAGE 81349 (4) O-ring, PN M83248/2-904, CAGE 81349 (2) Wrench, open end, 11/16 in. (3) Wrench, open end, 1 in.

b. Removal.

(1) Bleed HPFA IAW paragraph 6.8.1.

(2) Using 11/16 in. open end wrench, disconnect tube assembly (1, Figure 6-18) at filter (2).

(3) Using 11/16 in. open end wrench, loosen tube assembly (1) at connector (3) and rotate tube assembly (1) out of way.

(4) Using 1 in. open end wrench, remove filter (2) from manifold (4).

(5) Remove O-rings (5 and 6) IAW paragraph 4.7.6.1.

S6226-PD-MMO-010

6-38 Revision 1

Figu er. c. Instal

re 6-18. Filt

lation.

(1) Install O-rings (5 - 6) IAW paragraph 4.7.6.2.

NOTE

6.7.3 Shut Off Valve (AHP-V301) Removal and Installation

Ensure flow arrow points toward tube assembly (1).

(2) Noting direction of flow arrow, install filter (2) into manifold (4) with 1 in. open end wrench.

(3) Using 11/16 in. open end wrench, install tube assembly (1).

(4) Perform system tightness test IAW paragraph 6. 5.1.2.

.

T a. ools, Parts, and Materials. (1) Kit, O-ring extractor (2) O-ring, PN M83248/2-010, CAGE 81349 (3) O-ring, PN M83248/2-904, CAGE 81349, Qty 2 (4) Wrench, adjustable (5) Wrench, open end, 9/16 in. (6) Wrench, open end, 7/8 in. (7) Wrench, open end, 11/16 in.

b. Removal.

(1) Bleed HPFA IAW paragraph 6.7.1.

(2) Using adjustable wrench, remove eyeball indicator (1, Figure 6-19).

S6226-PD-MMO-010

Revision 1 6-39

e 6-19. Shutoff Valve (AHP-V301).

rench, remove HPFA indicator (2).

end wrench, disconnect tube assembly (3) from connector (4).

(3) at filter (5) and rotate tube

rench, loosen positionable union (7).

ng 7/8 in. open end wrench, remove shutoff valve (8) from positionable union (7).

move connector (4) from shutoff valve (8).

In a

Figur

(3) Using 11/16 in. open end w

(4) Using 11/16 in. open

(5) Using 11/16 in. open end wrench, loosen tube assemblyassembly (3) out of way.

(6) Using 9/16 in. open end w

(7) Usi

(8) Using 11/16 in. open end wrench, re

(9) Remove O-rings (6, 9, and 10) IAW paragraph 4.7.6.1.

c. stall tion.

(1) Install O-rings (6, 9, and 10) IAW paragraph 4.7.6.2.

NOTE

able union (7).

(2) Noting direction of flow arrow, install connector (4) in shutoff valve (8) with 11/16 in. open end wrench.

(3) Hand-tighten shutoff valve (8) on positionable union (7).

NOTE

Ensure shut off valve (8) knob is pointing toward front of HPFA.

Ensure flow arrow points toward position

S6226-PD-MMO-010

6-40 Revision 1

(4) Hold shutoff valve (8) with 7/8 in. open end wrench, while using 9/16 in. open end wrench to tighten positionable union (7).

(5) Using 11/16 in. open end wrench, install tube assembly (3).

(6) Using 11/16 in. open end wrench, install HPFA gauge (2).

(7) Using adjustable wrench, install eyeball indicator (1).

(8) Perform system tightness test IAW paragraph 6. 5.1.2.

6.7.4 Check Valve (AHP-V303) Removal and Installation.

a. Tools, Parts, and Materials. (1) Kit, O-ring extractor (2) O-ring, PN M83248/2-010, CAGE 81349, Qty 2 (3) Wrenches, open end, 11/16 in., Qty. 2

b. Removal.

(1) Bleed HPFA IAW paragraph 6.7.1.

(2) Using two 11/16 in. open end wrenches, disconnect tube assembly (3, Figure 6-20) and ing (1) at check valve (2).

c. Installation

coupl

(3) Remove O-rings (4) IAW paragraph 4.7.6.1.

.

(1) Install O-

Ensure flow arrow points toward coupling (1).

(3) Noting direction of flow arrow, position check valve (2) between tube assembly (3) and

assembly (3) and coupling (1) to check valve (2).

ring (4) IAW paragraph 4.7.6.2.

NOTE

coupling (1).

(3) Using two 11/16 in. open end wrenches, tighten tube

S6226-PD-MMO-010

Revision 1 6-41

Figure 6-20. Check Valve (AHP-V303).

(4) test IAW paragraph 6.5.1.2.

.7.5

Perform system tightness

6 Drain Valve (AHP-V305) Removal and Installation.

a. ools, Parts, and MaterialsT . (1) Handle, ratchet, 3/8 in. drive (2) Kit, O-ring extractor (3) Socket, 9/16 in. deep well, 3/8 in. drive (4) Wrench, Allen, 3/32 in. (5) Wren (6) Wren

ch, open end, 5/8 in. ch, open end, 9/16 in.

b. Removal

(7) Wrench, open end, 11/16 in. (8) Wrench, strap

.

(1) Bleed HPFA IAW paragraph 6.7.1.

(2) cartridges IAW MRC S-1 step 1 a through c.

ndle, remove nut (1, Figure 6-21) on band clamp assembly (2). Move band clamp assembly (2) out of way.

Remove filter

(3) Using 9/16 in. deep well socket and 3/8 in. drive ratchet ha

S6226-PD-MMO-010

6-42 Revision 1

(4) in. deep well socket, loosen coalescor mounting bolts (14).

(5) Remove spider assembly (3).

(6) Using strap wrench, remove TOWER 2 (4).

(7) Using 11/16 in. open end wrench, disconnect tube assemblies (5 and 6).

(8) Using 3/32 in. Allen wrench, remove set screw (7) and remove knob (8).

(9) Using 5/8 in. open end wrench, remove bonnet (9).

(10) Using 11/16 in. open end wrench, remove panel mounting nut (10).

Figure 6-21. Drain Valve (AHP-V305).

Using 9/16

S6226-PD-MMO-010

Revision 1 6-43/(6-44 blank)

(11) Remove drain valve (11).

(12) Remove O-rings (12 and 13) IAW paragraph 4.7.6.1.

c. Installation.

(1) Install O-rings (12 and 13) IAW paragraph 4.7.6.2.

NOTE

Ensure flow arrow points toward tube assembly (6).

(2) Noting direction of flow arrow, position drain valve (11) in place, hand-tighten tube assemblies (5 - 6) to drain valve (11).

(3) Using 11/16 in. open end wrench, install panel mounting nut (10).

(4) Using 11/16 in. open end wrench, tighten tube assemblies (5 and 6)

(5) Using 5/8 in. open end wrench, install bonnet (9).

(6) Position knob (8) in place.

(7) Using 3/32 in. Allen wrench, install set screw (7).

(8) Using strap wrench, install TOWER 2 (4).

(9) Install spider as

(10)

deep well socket, secure nut (1)

pleting MRC S-1 procedures beginning with step 1 d.

( raph 6.5.1.2.

sembly (3).

Using 9/16 in. deep well socket, tighten coalescor mounting bolts (14).

(11) Move band clamp assembly (2) into place. Using 9/16 in. on band clamp assembly (2).

(12) Install filter cartridges by com

13) Perform system tightness test IAW parag

S6226-PD-MMO-010

Revision 1 7-1

CHAPTER 7 ILLUSTRATED PARTS BREAKDOWN

7.1 INTRODUCTION.

lf-Contained Breathing Apparatus Breathing Air Charging System (SCBA BACS). Each assembly or component has an exploded or cutaway view of the item and a corresponding table listing th nd information necessary for ordering.

7.2 PARTS LISTS AND

This chapter provides the Illustrated Parts Breakdown (IPB) for the Se

e parts a

ILLUSTRATIONS.

F through 7-5 provide parts lists for principal SCBA BACS assemblies and indentured compod

igures 7-1 nents. Table column hea

• FIG art location on the corresponding illustration.

• CAG I AGE) code for the part manufacturer.

• PAR O ecord (FEDLOG) part number is provided.

• DES P t descriptive data of the part.

• QTY

.3 LIST O A

URE – INDEX NO.: Indicates the figure and index numbers relating to p

E: dentifies the Commercial and Government Entity (C

T N .: The Federal Logistics R

CRI TION: Contains the designated name and pertinen

: Indicates the quantity required per assembly.

7 F M NUFACTURERS.

Table 7-6 lists the manufacturers that supply parts for the BACS. Their addresses and cageprovided to facilitate parts ordering.

codes are also

S6226-PD-MMO-010

Revision 1 7-3

Figure 7-1. ABPA (Sheet 2 of 4)

32

31

2X

2X

39

33

31 2832 29

29

28

43

32

31

S6226-PD-MMO-010

7-4 Revision 1

Figure 7-1. ABPA (Sheet 3 of 4)

61

654464

62

63 36

64 44

50

67

46 45

4566

68

44 45 46

47

44

J

48 45 D

5251

57

58

2X

31

2X

32

59

60

2X

25

2X

53

2X

44

54

2X

253656

37 36

55 54 25

25

49

S6226-PD-MMO-010

Revision 1 7-5

Figure 7-1. ABPA (Sheet 4 of 4)

4X 9

4X

9

2X4X

8010

31 32

25

96

94

98

832X

4X 10

16

82

81

E

H

3619 25

84

312X 2X

32

5455 25

3X41 25

10

3X

6X

9

80 3X

91

90 25

54

2X31

94

95

31

25

32

93

85

40

40

3656 25

322X

25

2541

3X

87

41403X25

92

6

7

2X

88

2X

79

2X

56 2536

E

78

25

36

56

403X

41

25

G

3231

2X2X

77

4X

76

75

4X73

56 36 25

403X

2556 36

H

2X 2X31 32

46

86

4445

322X2X

31

2X2X

71

3231

D

70

41 25

L2X

69 25

89 25

4X74

8X72

S6226-PD-MMO-010

7-6 Revision 1

Table 7-1. ABPA Parts List.

FIGURE- ITEM NO.

CAGE PART NO. DESCRIPTION QTY

7-1, REF 53711 53711ASSY7245940 Assembly, Air Booster Pump 1 1 53711 53711-7245950 Panel, Control 1 2 96906 MS51959-16 Screw, Mach 4-40UNC-2A X .437 LG 52 3 53711 53711-7245952 Cover, Rear 1 4 53711 53711ASSY7245956-3 Assembly, Hinge 2 5 96906 MS51957-69 Screw, Mach .190-24UNC-2A X 1.75 LG 6 6 96906 MS15795-808 Washer, Flat .190 Nom 24 7 96906 MS17830-3C Nut, Hex, Self-Locking .190-24UNC-3B 10 8 53711 53711-7245955 Weldment, Frame 1 9 96906 MS17830-4C Nut, Hex, Self-Locking .250-20UNC-3B 15

10 96906 MS15795-853 Washer, Flat .250 Nom 30 11 53711 53711-7245956-13 Pad, Polyurethane 4 12 96906 MS35307-308 Bolt, Hex Head .250-20UNC-2A X 1.00 LG 6 13 96906 MS35307-312 Bolt, Hex Head .250-20UNC-2A X 1.5 LG 2 14 OKWT7 6341 Eye nut 1 15 96906 MS15795-811 Washer, Flat.312 Nom 1 16 96906 MS35307-318 Bolt, Hex Head .250-20UNC-2A X 3.0 LG 2 17 39428 92314A245 Bolt, Hex Head .190-24UNC-2A X .75 LG 8 18 53711 53711-7245951 Cover, Front 1 19 11649 SS-4-VCO-1-6ST-CA-6 Connector, SAE/MS 1 20 96906 MS51957-67 Screw, Mach .190-24UNC-2A X 1.0 LG 3 21 52159 25504-36Y11MCG Gauge, Pressure, 0 to 6,000 psig 1 22 81349 M83248/2-008 O-Ring 4 23 52159 25502-35Y11MCG Gauge, Pressure, 0 to 5,000 psig 2 24 12623 SS-33VVCO4 Valve, Ball 1 25 81349 M83248/2-010 O-Ring 37 26 52159 25502-25Y11MCG Gauge, Pressure, 0 to 200 psig 1 27 52159 RS-426-1 Kit, Panel Mounting 3 28 99565 949R-4-SS-316L Tailpiece 4 29 99565 950-4-SS-304 Nut, Union 4 30 53711 53711-7245940-2 Assembly, Tube, T-202 1 31 11649 SS-4-VCO-3 Gland, Socket Weld 25 32 11649 SS-4-VCO-4 Nut, Female 25 33 53711 53711-7245940-3 Assembly, Tube, T-203 1 34 73992 P-SDC-2-HK Cap, Dust Socket, Quick Disconnect 1

S6226-PD-MMO-010

Revision 1 7-7

Table 7-2. ABPA Parts List. - Continued

FIGURE- ITEM NO.

CAGE PART NO. DESCRIPTION QTY

35 73992 ML2-H6-143 Socket, Quick Disconnect 1 36 81349 M83248/2-906 O-Ring 11 37 11649 SS-4-VCO-11-6ST-CA-6 Union, Bulkhead 2 38 53711 53711-7245940-8 Assembly, Tube, T-209 1 39 53711 53711-7245040-4 Assembly, Tube, T-204 1 40 11649 SS-4-WVCO-6-DF-CA-6 Coupling, Close 6 41 11649 SS-4-VCO-T-CA-6 Tee 6 42 53711 53711-7245940-9 Assembly, Tube, T-210 1 43 53711 53711-7245940-16 Assembly, Tube, T-217 1 44 81349 M83248/2-111 O-Ring 7 45 81349 M83248/2-908 O-Ring 5 46 11649 SS-8-VCO-9P-8ST Elbow, Positionable 3 47 11649 SS-8-WVCO-6-DF Coupling, Close 1 48 11649 SS-8-WVCO-1-8ST Connector, SAE/MS 1 49 53711 53711-7245940-5 Assembly, Tube, T-206 1 50 12623 SS-6NKRVCO8 Valve, Shutoff 1 51 11649 SS-8-VCO-3 Gland, Socket Weld 2 52 11649 SS-8-VCO-4 Nut, Female 3 53 11649 SS-4-VCO-TP-4VCO-4ST-CA-6 Tee, Positionable 1 54 81349 M83248/2-904 O-Ring 5 55 11649 SS-4-VCO-9P-4ST-CA-6 Elbow, Positionable 2 56 11649 SS-4-VCO-9P-6ST-CA-6 Elbow, Positionable 6 57 73992 ML2-K6-143 Plug, Quick Disconnect 1 58 73992 P-PDC-2-HK Cap, Dust Plug, Quick Disconnect 1 59 53711 53711-7245940-1 Assembly, Tube, T-201 1 60 33538 44-3213J-161-613 Regulator, Pressure 1 61 53711 7245956-10 Spacer 1 62 33538 8686-1 Nut, Panel 1 63 11649 SS-8-WVCO-1-6ST Connector, SAE/MS 1 64 11649 SS-8-VCO-1-8 Connector, Male 2 65 03990 F25241-311 Tee, Filter 1 66 99237 AN937K8 Cross 1 67 08752 8-1/2 F50G-SS Adapter, Female Pipe 1 68 91816 M5132N-4M(L)-150 ASME Valve, Relief (set pressure 150 psig) 1 69 12623 SS-3NKRVCO4-W1 Valve, Shutoff 1 70 53711 53711-7245940-10 Assembly, Tube, T-211 1 71 53711 53711-72459 e, T-212 1 40-11 Assembly, Tub

S6226-PD-MMO-010

7-8 Revision 1

Table 7-3. ABPA Parts List. - Continued

FIGURE- ITEM NO.

CAGE PART NO. DESCRIPTION QTY

72 96906 MS15795-814 Washer, Flat .375 Nom 8 73 96906 MS35307-364 Bolt, Hex Head .375-16UNC-2A X 1.5 LG 4 74 96906 MS17830-6C Nut, Hex, Self-Locking .375-16UNC-3B 4 75 2N386 80274-100 Pump, Booster 1 76 53711 53711-7245956-8 Shim 2 77 53711 53711-7245940-12 Assembly, Tube, T-213 1 78 53711 53711ASSY7245956-12 Assembly, Clamp, Inner Half 2 79 53711 53711ASSY7245956-11 Assembly, Clamp, Outer Half 2 80 96906 MS35307-315 Bolt, Hex Head .250-20UNC-2A X 2.25 LG 5 81 11649 316L-50DMS6-500-CA-6 Cylinder 1 82 18034 SS-4R3A-1509 Valve, Relief (set pressure 5,300 psig) 1 83 18034 177-R3A-K1-H Spring 1 84 53711 53711-7245940-14 Assembly, Tube, T-215 1 85 11649 SS-4-VCO-1-4ST-CA-6 Connector, Male 1 86 53711 53711-7245940-15 Assembly, Tube, T-216 1 87 59165 U10005 Filter, In-Line 1 88 53711 53711-7245956-5 Stop, Anti-rotational 1 89 11649 SS-4-WVCO-1-4ST-CA-6 Connector, SAE/MS 1 90 11649 SS-4-VCO-61-05494-CA-6 Union, Bulkhead 1 91 53711 53711ASSY7245943-1 Assembly, CGA Cap 1 92 96906 MS51957-65 Screw, Mach-Pan Head .190-24UNC-2A X

.75 LG 1

93 11649 SS-2-P Plug 1 94 11649 SS-4-VCO-2-2 Elbow, Male 2 95 53711 53711-7245940-6 Assembly, Tube, T-207 1 96 81400 80949-2 Switch, Pilot 1 97 11649 SS-8-VCO-3-4TSW Gland, Socket Weld, Reducing 1 98 53711 53711-7245940-7 Assembly, Tube, T-208 1 99 96906 MS51957-94 Screw, Mach-Pan Head 0.312-18UNC X .50

LG 1

100 2N386 80839-100 Spooler Valve Assembly 1

S6226-PD-MMO-010

Revision 1 7-9

Figure 7-2. HPFA (Sheet 1 of 2)

37

24

7

9

39

21

6

24

37

39

21

24

38

36

37

40

2

24

3316

25

25

33

25

41

3316

3316

25

33

2425

4

26

35

34

3330

30

4233

19

23

3724

5

331625

43

44

45

14

17

1516

46

13

11

12

11

10

8

2X2X

2X

2X

2X

2X

2X2X

2X

2X

2X2X

3X

2X2X

A

CB

C

B

A

D

E

D

F FG

G

VIEW SHOWING TUBE RUNS

22

16

10 REF

SEE VIEW A

19

23

2X

2X

21

18

19

20

4 REF5REF

6REF

7REF3 REF

2 REF

47

16 2X

H JK

2916

18

19

32

21

27

28

8 REF

IN APPROXIMATE ASSEMBLEDPOSITION (FILTERS AND OTHERPARTS OMITTED FOR CLARITY)

S6226-PD-MMO-010

7-10 Revision 1

HPFA (Sheet 2 of 2)

Figure 7-2.

49 52

48

64

63

62

61

60

50

59

53 4

5

5658 57 44 2243

265

5

54

24

51

51

3351

25

51

3351

16176

2X REF

4X4X

2X2X

1

1716

4X REF4X

E

VIEW A

THIS VIEW IS ITEMS IN VIEW A ASSEM

SHOWNBLED

2X

5051

505116 51 2X

H

J

PART OFIND NO 1

K

F. 1

S6226-PD-MMO-010

Revision 1 7-11

-2 HPFA Parts List.

FIGURE- ITEM NO.

T NO. QTY

Table 7

CAGE PAR DESCRIPTION

7-2, 5 5 Assem re Filter 1 1 3711 3711ASSY7245941 bly, High Pressu2 53711 5 Tub 1 3711-7245941-4 ing, T-302 3 53711 5 Tub 1 3711-7245941-6 ing, T-306 4 53711 5 Tub 1 3711-7245941-1 ing, T-305 5 53711 5 Tub 1 3711-7245941-2 ing, T-304 6 53711 5 Tub 1 3711-7245941-5 ing, T-301 7 53711 5 Tub 1 3711-7245941-3 ing, T-303 8 53711 5 Assem 1 3711ASSY7245956-1 bly, Spider 9 11649 SS- -6 Tee 1 4-VCO-T-CA

1 5 5 Assem 1 0 3711 3711ASSY7245956-2 bly, Band Clamp11 1D PUR Hol 2 L97 -002-AG der, Cartridge 1 1 X532 Ele . 2) 1 2 DL97 48 ment, Filter (Tower No1 1 X536 Ele 1) 1 3 DL97 78 ment, Filter (Tower No. 14 99 64 Co Thread 1 565 T-1-1-SS nnector, Female Straight15 11 SS- -CA-6 Uni 1 649 8-VCO-11-6AN on, Bulkhead 1 M8 O- 14 6 81349 3248/2-906 ring 1 M8 O- 3 7 81349 3248/2-111 ring 18 96 M Scre d .190-24UNC-2A

X 2 906 S51957-67 w, Ma

1.00 LG ch-Pan Hea

19 96906 M W 5 S15795-848 asher, Flat .190 Nom 20 53711 5 St 1 3711-7245956-4 op, Anti-rotational 21 96906 M Nu NC 5 S17830-3C t, Self Locking .190-24U22 53711 53711-7245945 W 1 eldment, Frame 23 96906 M Sc -24UNC-2A

X .3 S51957-65 rew, Mach-Pan Head .190

75 LG 24 11649 S Gl ket Weld 12 S-4-VCO-3 and, Soc25 11649 S O-4 Nu 12 S-4-VC t, Female 26 11649 SS-6-ST-6-24937-CA-6 Un 2 ion, Positionable 27 73992 M So nnect 1 L2-H6-143 cket, Quick Disco28 73992 P Ca ket, Quick Disconnect 1 -SDC-2-HK p, Dust Soc29 59165 U10006 Filter, ine 1 In-L30 11649 S T-CA-6 Un 1 S-4-VCO-11-6S ion, Bulkhead 32 53711 5 St 1 3711-7245956-14 op, Anti-rotational 33 81349 M O- 14 83248/2-010 ring 34 73992 M Pl 1 L2-K6-143 ug, Quick Disconnect 35 73992 P Ca onnect 1 -PDC-2-HK p, Dust Plug, Quick Disc36 11649 SS-4-WVCO-6-DF-CA-6 Coupling, Close 1

S6226-PD-MMO-010

7-12 Revision 1

Table 7-2. HPFA Parts List. - Continued

ITEM NO. CAGE PART NO. DESCRIPTION QTY FIGURE-

37 11649 SS-4-VCO-9P-6ST-CA-6 Elbow, Positionable 4 38 18034 SS-CHVCO4-5-NC13 Valve, Check (AHP-V303) 1 39 96906 MS21919WCH4 Clamp, Loop 3 40 11649 SS-8-VCO-3-4TSW , Socket Weld Reducing Gland 1 41 11649 SS-8-VCO-4 Nut, Female 1 42 12623 SS-1KVCO-4-W1 Valve, Shutoff (AHP-V305) 1 43 96906 MS15795-814 Washer, Flat .375 Nom 6 44 96906 MS35307-360 Screw, Cap, Hex Head .375-16UNC-2A X

1.00 LG 6

45 70058 504 SET PRESSURE 3300 Valve, Relief (AHP-V304) 1 46 1DL97 PUP-020-AG Coalescor 1 47 96906 MS51969-3 Nut, Plain .375-16UNC 1 48 53711 53711-7245941-7 Tubing, T-307 1 49 1DL97 GG-182020 Housing, Eyeball CO/H2O Indicator 1 50 11649 4-P50N-SS Plug 3 51 81349 M83248/2-904 O-ring 9 52 59165 U10008 Filter, In-Line 1 53 24708 2000-039-00 Gauge, 0 to 5000 psi (AHP-G301) 1 54 11649 SS-8-VCO-9P-6ST-CA-6 Elbow, Positionable 2 55 11649 SS-8-WVCO-6-DF-CA-6 Coupling, Close 1 56 96906 MS35307-306 Screw, Cap, Hex Head .250-20UNC-2A X

G .75 L4

57 96906 MS15795-853 Washer, Flat .265 Nom 4 58 OKWT7 6341 Eye-nut 1 59 96906 MS51959-96 Screw, Mach

.75 LG -Flat CSK .312-18UNC-2A X 1

60 91816 HV50-63 Valve, Bleed (AHP-V302) 1 61 53711 53711-7245947 Block, Manifold 1 62 08752 4 F50HAO Union, Positionable 1 63 91816 HV94-25 ve, Shutoff (AHP-V301) 1 Val64 11649 SS-4-VCO-1-4ST-CA-6 Connector, Male 1

S6226-PD-MMO-010

Revision 1 7-13

Table 7-3. Drive Air Hose Assembly Parts List.

FIGURE- ITEM NO.

CAGE PART NO. DESCRIPTION QTY

7-3 1 53711 53711ASSY7245944-2 Assembly, Drive Air Hose (H-101) 1 2 73992 P-SDC-2-HK Cap, Dust Socket, Quick Disconnect 2 3 73992 ML2-H6-143 Socket, Quick Disconnect 2 4 11704 SS-8R-6-ST6-ST6-120-W1 Hose 1 5 F5718 2471 Shackle, Snap 2 6 39428 3458T77 Wire Rope, Flexible AR 7 96906 MS51844-64 Sleeve, Swaging 4 8 08TX0 01-041-3103 Cord, Fibrous (0.012 Dia) AR

N/A 81349 M83248/2-9 2 06 O-ring

S6226-PD-MMO-010

7-14 Revision 1

Table 7-4. Filtered Air Hose Assembly Parts List.

FIGURE- ITEM NO.

CAGE PART NO. DESCRIPTION QTY

7-4 1 53711ASSY7245944-1 Assembly, Filtered Air Hose (H-102) 1 2 P-PDC-2-HK Cap, Dust Plug, Quick Disconnect 2 3 ML2-K6-143 Plug, Quick Disconnect 2 4 SS-8R-6-ST6-ST6-120-W1 Hose 1 5 2471 Shackle, Snap 2 6 3458T77 Wire Rope, Flexible AR 7 MS51844-64 Sleeve, Swaging 4 8 01-041-3103 Cord, Fibrous (0.012 Dia) AR

N/A M83248/2-906 O-ring 2

S6226-PD-MMO-010

Revision 1 7-15

iltered Air Supply

FIGURE- ITEM NO.

NO. QTY

Table 7-5. F Hose Assembly Parts List.

CAGE PART DESCRIPTION

7-5 5948-1 ir Supply Hose 1 1 53711 53711ASSY724 Assembly, Filtered A2 62882 LV3-4ST-KF 2 Valve, In-Line* 3 5 ter 2 3711 53711-7245948-3 Weldment, Adap4 5 -2 1 3711 53711-7245948 Weldment, Tee 5 11704 SS-8R-4-ST4-ST4-120 2 Hose 6 5 -2 3 3711 53711-7245943 Plug, CGA 7 96906 MS51844-62 Sleeve, Swaging 6 8 81349 M83420/4-002 Rope, Wire 10.0 in. Long 3 9 8 3 1349 M83248/2-010 O-ring

10 8 6 1349 M83248/2-904 O-ring

S6226-PD-MMO-010

7-16 Revision 1

Table 7-6. List of Manufacturers.

C MANUFACCAGE ODE TURERS ADDRESS

0KWT7 Wichard Inc. 507 Hoprneadow St, Simsbury, CT 06070-0000 0399 Ar ne Arc Ce 6-0000 0 o Corp. O nter, Bryan, OH 43500597 Lo 001 Trout Bro 067 2 ctite Corp. 1 ok Crossing, Rocky Hm, CT 060743 Je 4849 Home 258, Houston, TX

77026-58111 t Lube Inc. stead Rd. No.200, P .0. Box 21

08TX Fo 743 Gantt AO ss-Brown Inc. ve., Sarasota, FL 34232 0875 Park 2360 Palumb2 er-Hannifin o Dr., Lexington, KY 40509 1DL9 L 2748 W. 79 FL 33016 7 awrence Factor th St, Hialeah,1164 C 9760 Shepa -1124 9 ajon rd Rd., Macedonia, OH 440561170 Sw Ltd. 4605 Kent A 2E 6S8 4 agelok Canada ve., Niagara Falls, ON L1262 W 318 Bishop 3-1533 3 hltey Rd., Cleveland, OH 44141803 N 4800 E. 3454 upro th St, Wi/1oughby, OH 4409-4607 2N386 Hydraulics Inti. Inc. 9000 Mason atsworth, CA 91311-0000 Ave., Ch2470 Q 0 S. Hal 8 ED Inc. 292 aday St, Santa Ana, CA 927053353 T 12616 Indus Elk River. MN 55330-2445 8 escom trial Blvd., 39428 M upply

C600 County lmhurst, IL 61026 cMaster-Carr S

o. Line Rd., E

5215 3D 15542 Chem ington Bch. CA 92649-1505 9 ical Lane, Hunt5916 Nonn 9850 S. Indu 5 an strial Dr., Oak Lawn, IL 60455-23076288 In , Inc. 500 Ogden 2 flation System Ave., Mamaroneck, NY 10543-0000 7005 Accurate Gear Co. Detroit. MI 8 482007399 H 1000 W. Ba Berea, OH 44017-0805 2 ansen gley Rd.,81400 Haskel 100 E. Graham A 91502-2027 Place, Burbank, C9181 C 2301 Wardl , CA 91720 6 ircle Seal ow Rd., Corona9956 C 815 N. Pres5 PV ton, Philadelphia, PA 19104-1598 8024 G

AdSu

rystal Mal n Davis Hwy., Washington, 406

4 eneral Services ministration Federal

C20

pply Service

l Bldg 4, 1941 Jefferso DC

9690 M 6 ilitary Standards 81349 Military Specification 5371 N 1 AVSEA 9923 A

tical Design 7 ir Force-Navy

Aeronau

S6226-PD-MMO-010

Revision 1 A-1/(A-2 Blank)

APPENDIX A OPERATIONAL CHECKLISTS

A.1 INTRODUCTION.

The checklists provided in this Appendix should be completed while performing the same procedures in Chapter 2 Operating Procedures. Copy and complete the checklists as needed.

A.2 CHECKLISTS PROVIDED.

The following checklists are provided in this Appendix:

• Table A-1 – Setup Checklist

• Table A-2 – Operation Checklist

• Table A-3 – Disassembly Checklist

• Table A-4 – Emergency Operation Checklist

S6226-PD-MMO-010

Revision 1 A-3/(A-4 Blank)

Table A-1. Setup Checklist

FOR DETAILED PROCEDURES, REFER TO PARAGRAPH 2.3.1 ARER’S NAME: DATE:

PREP

a. Move ABPA to within 5 to 7 feet of HPFA.

b. Ensure ship high-pressure air system valve is closed.

WARNING A color change from blue to pink in the H2O/CO indicator reveals a high moisture content; a color change from yellow to brown indicates a high CO content. Any color change requires replacement of filter cartridges and indicator elements IAW paragraphs 6.7.1 and 6.7.2 to avoid serious injury or death to personnel.

c. Check HPFA H2O/CO indicator for appropriate colors.

d. Ensure HPFA shutoff valve (AHP-V301) and drain valve (AHP-V305) are closed.

WARNING Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death to personnel from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury.

e. Open HPFA bleed valve (AHP-V302). Bleed pressure; close valve.

CAUTION Ensure hose are routed to avoid equipment damage.

f. Remove dust caps, connect drive air hose assembly (H-101) to HPFA and ABPA drive air inlet quick-disconnect sockets, and attach snap shackles to eye nuts.

g. Remove dust caps, connect filtered air hose assembly (H-102) to HPFA and ABPA filtered air inlet quick-disconnect nipples, and attach snap shackles to eye nuts.

h. Remove dust caps and connect Filtered Air Supply Hose Assembly (H-103) to ABPA filtered air supply.

i. Ensure filtered air supply hose assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knobs and bleed handles are closed.

S6226-PD-MMO-010

Revision 1 A-5

Table A

FOR DETAILED PROCEDURES, REFER TO PARAGRAPH 2.3.2 DATE:

-2. Operation Checklist Page 1 of 3

PREPARER’S NAME:

WARNING Before operating the BACS, ensure that a gas sample has been taken within

s IAW MRC Q-1 to ensure that Grade D air quality, as defined by CGA G-7.1, is being produced to avoid serious injury or death to the last three month

personnel.

a. Ensure ABPA drive air regulator (AHP-V201) is fully unloaded by rotating counterclockwise.

l valve (ALP-V203), drive air bleed valve (ALP-V204), and filtered air inlet b. Ensure ABPA drive air controvalve (AHP-V206) are closed.

c. r system valve. Listen for leaks in HPFA. Slowly open ship high-pressure ai

1) fully counterclockwise, then back off valve 1/4 turn. d. Turn HPFA shutoff valve (AHP-V30

until regulated air pressure gauge (ALP-G202) reads e. Adjust ABPA drive air regulator (AHP-V201) 125 ± 5 psig.

f. Attach Filtered Air Supply Hose Assembly (H-103) to SCBA cylinder assembly(ies) and/or quick-charge wand(s) supplied with SCBAs.

WARNING Do not refill any SCBA cylinder assembly that is damaged. Failure to inspect, depressurize, and remove a damaged SCBA cylinder assembly may result in serious injury or death to personnel.

g. Prior to charging an SCBA cylinder assembly, inspect entire SCBA or SCBA cylinder assembly for evidence of exposure to chemicals, high temperature, impact damage, or worn components.

NOTE If quick-charge wands are used, proceed to step s.

h. Open SCBA cylinder(s) valve fully by rotating counterclockwise, then back off valve 1/4 turn.

i. Open filtered air supply hose assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knobs for each SCBA cylinder assembly connected.

j. Open ABPA filtered air inlet valve (AHP-V206).

k. When readings on ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet pressure gauge (AHP-G204) are equal, open drive air control valve (ALP-V203) four to six complete turns.

NOTE Open HPFA drain valve (AHP-V305) approximately every 15 minutes to vent moisture during charging evolution.

l. When air booster pump stops or SCBA dual-reading pressure indicator reads approximately 4,500 psig, close filtered air supply hose assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knob(s).

WARNING Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury.

m. Close each SCBA cylinder valve fully; open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) bleed handle(s) to bleed air between each SCBA cylinder assembly and the corresponding hose isolation valve (AHP-V101/AHP-V102). Close bleed handles.

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Table A-2. Operation Checklist - Continued Page 2 of 3

FOR DETAILED PROCEDURES, REFER TO PARAGRAPH 2.3.2 PREPARER’S NAME: DATE:

n. Disconnect Filtered Air Supply Hose Assembly (H-103) from each SCBA cylinder assembly. If mission is complete, proceed to step y. If not continue with next step.

o. Attach Filtered Air Supply Hose Assembly (H-103) to SCBA cylinder assembly.

p. Open each SCBA cylinder valve fully, then back off valve 1/4 turn.

q. Open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knob(s) for each SCBA cylinder assembly connected.

r. As needed, repeat procedure beginning with step 1. When mission is complete, proceed to step y.

CAUTION Ensure hoses are routed to avoid equipment damage.

s. Open Filtered Air Supply Hose Assembly (H-103) hose isolation valves (AHP-V101/AHP-V102) shutoff knob(s) for each quick-charge wand connected in step f..

t. Open ABPA filtered air inlet valve (AHP-V206).

u. When readings on ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet pressure gauge (AHP-G204) are equal, open drive air control valve (ALP-V203) four to six complete turns counterclockwise.

v. Connect a quick-charge wand to each SCBA cylinder assembly.

w. As each SCBA cylinder assembly is filled, disconnect quick-charge wand.

x. Repeat steps v and w as needed. When mission is complete, proceed to step y.

y. Close ship HP air source supply valve.

WARNING Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury.

NOTE

ABPA regulated air pressure gauge (ALP-G202) and drive air inlet pressure gauge (AHP-G201) should read zero.

z. Slowly open HPFA drain valve (AHP-V305) and ABPA drive air bleed valve (ALP-V204). Bleed drive air circuit. Close valves (AHP-V305 and ALP-V204).

aa. Close HPFA shutoff valve (AHP-V301).

WARNING Before opening bleed valves, ensure all personnel stand clear to avoid serious injury or death to personnel from flying debris. Operator shall announce BLEEDING DOWN to warn nearby personnel. Operator must wear protective eyewear and hearing protection to prevent personal injury.

NOTE ABPA filtered air outlet pressure gauge (AHP-G203) and filtered air inlet pressure gauge (AHP-G204) should read zero.

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Table A ntinued Page 3 of 3

DETAILED PROCEDURES, REFER TO PARAGR 3.2 PREPARER’S NAME: TE:

-2. Operation Checklist - Co

FOR APH 2.DA

bb. Depressurize system IAW one of the following:

(1) SCBA Cylinder Assembly Charging Configuratio

) Quick-Charge Configuration n

(2

a. ConneAssemassemHose A e isolation

d Air Supply se isolation 102) bleed

handle(s).

ct Filtered Air Supply Hose bly (H-103) to SCBA cylinder

bly and open Filtered Air Supply ssembly (H-103) hos

a. Bleed system using FiltereHose Assembly (H-103) hovalves (AHP-V101/AHP-V

valves (AHP-V101/AHP-V102) shutoff knob(s).

b. Bleed system using Filtered Air Supply b. Close Filtered AirHose Assembly (H-103) hose isolation valveshandle

Supply Hose Assembly (H-103) hose isolation valves

hutoff knob(s) (AHP-V101/AHP-V102) bleed (s).

(AHP-V101/AHP-V102) sand bleed handle(s).

c. Close (H-10(AHP-

Filtered Air Supply Hose Assembly 3) hose isolation valves V101/AHP-V201) shutoff knob(s)

and bleed handle(s). d. Disconnect Filtered Air Supply Hose

Assembly (H-103) frassembly.

from Filtered (H-103).

om SCBA cylinder

OR

c. Remove quick-charge wandAir Supply Hose Assembly

cc. Close ABPA filtered air inlet valve (AHP-V206) and drive air control valve (ALP-V203) fully clockwise.

dd. Back off ABPA drive air regulator (AHP-V201) until spring tension is released. The BACS is now in STANDBY condition.

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T

able A-3. Disassembly Checklist.

FOR DETAILED PROCEDURES, REFER TO PARAGRAPH 2.3.3 PREPARER’S NAME: DATE:

a. Disconnect drive air hose assembly (H-10 air hose assembly (H-102) from HPFA and ABPA. Cap h

1) and filteredose assemblies.

b. Disconnect Filtered Air Supply Hose Assembly (H-103) from ABPA. Cap hose assembly.

c. Cap al ABPA drive air filtered air connection points. l HPFA and

d. Perform scheduled maintenance, as required.

e. Stow hoses and ABPA IAW ship procedures.

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Revision 1 A-11/(A-12 Blank)

Table A-4. Emergency Operation Checklist.

FOR DETAILED PROCEDURES, REFER TO PARAGRAPH 2.3.4 PREPARER’S NAME: DATE:

a. Immediately close ship HP air system valve.

b. Refer to Chapter 5, Troubleshooting, for fault isolation procedures.