BC-S-310+

BBoobbccaattService Manual

310, 313 & 371Skid Steer

THIS IS A MANUAL PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF BOBCAT OR IT’S SUCCESSORS. BOBCAT AND IT’S SUCCESSORS

ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS MANUAL.

TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS.

Serv

ice

Man

ual

• bobcat

6556606 1.3M

Melroe Division

.. '

Printed in U. S. A.

FOREWORD

This manual gives instruction for correct servicing and adjustment of the Bobcat, and overhaul instructions of the, hydraulic system, electrical system, engine and general mainframe parts.

Make reference to the Owner's Manual for operating instructions (Starting Procedure, .Daily Checks and Maintenance, Bobcat Operation, etc.).

A general inspection of the following items should be made whenever the loader has had service or repair.

1. Check hydraulic fluid level, engine oil level and fuel supply.

2. Inspect for any fuel, oil or hydraulic fluid leaks.

3. Lubricate the loader.

4. Check battery condition, electrolyte level and cables.

5. Inspect air cleaner system for damage or leaks. Check element and replace as needed.

6. Check electrical charging system.

7. Check indicator lamps.

8. Check tires for wear and pressure.

9. Check the Bob-Tach attachment for condition. Inspect the wedges for damage or wear.

10. Inspect safety items for condition (Operator Enclosure, Seat Belt, Saftey Treads, Lamps, etc.).

11. Make visual inspection for loose or broken parts or connections.

12. Operate the loader, checking all functions.

Check the above items, if any are in need of repair tell the Owner:

CONTENTS

ALPHABETICAL INDEX ....... ............................. .. 9

DRIVE SYSTEM ............................................. 3

ELECTRICAL SYSTEM ....................................... 5

ENGINE 310 . ................................................ 6

ENGINE 313 .. :~.: ............................................. 7

HYDRAULIC SYSTEM ........................................ 2

MAl N FRAME ............................................... 4

PREVENTIVE MAINTENANCE .............................. :.1

SPECiFiCATIONS ............................................ 8

PREVENTIVE MAINTENANCE

HYDRAULIC SYSTEM

DRIVE . SYSTEM

MAIN FRAME

ELECTRICAL SYSTEM

ENGINE (310)

ENGINE (313)

TECHNICAL DATA

ALPHABETICAL INDEX

310, 313 Loader Service Manual

PREVENTIVE MAINTENANCE

AIR CLEANER ......................... . DRIVE SySTEM ........................ . ELECTRICAL SySTEM .................. . ENGINE SERVICE (General) ............. . FUEL SySTEM ......................... . HYDRAULIC CYLINDER AND CONTROL

VALVE .............................. . HYDRAULIC SYSTEM (310) ............. . HYDRAULIC SYSTEM (313) ............. . INTRODUCTION ........................ . LUBRICATION ......................... . OPERATOR ENCLOSURE ............... . SERVICE SCHEDULE ................... . TRANSMISSION AND DRIVE SYSTEM .. .

Paragraph Number

1-4 1-9 1-6 1-3 1-5

1-10 1-8 1-7 1-1

1-12 1-13 1-2

1-11

Page Number

1-7 1-16 1-11 1-4 1-7

1-17 1-15 1-14 1-1

1-19 1-19 1-3

1-18

PREVENTIVE MAINTENANCE

310.313 loader Service Manual

DRIVE SYSTEM

AXLES AND BEARINGS ................ . CHAINCASE & COVER ................. .

DRIVE CHAIN .......................... . DRIVE, DESCRIPTION OF ............... . LOWER JACKSHAFT ................... . PARK BRAKE .......................... . STEERING LINKAGE .................... . TRANSMISSION AND DRIVE

SySTEM ............................ . UPPER JACKS HAFT ................... . RANGE CONTROL CLUTCH, TO

SERVICE ............................ .

Paragraph

Number

3-8 3-5 3-3 3-1 3-6

3-10 3-4

3-2 3-7

3-9

Page

Number

3-8 3-7 3-3 3-1 3-7

3-11 3-6

3-2 3-7

3-10

DRIVE SYSTEM I

310. 313 loader Service Manual

MAIN FRAME

BOB-TACH ........................... . FUEL TANK ........................... . LIFT ARMS ............................ . REAR DOOR ........................... . SUPPORT BRACKET, LIFT ARM ........ .

Paragraph

Number

4-1 4-4 4-2 4-3 4-5

Page Number

4-1 4-2

4-11 4-2 4-2

MAIN FRAME

310, 313 loader Service Manual

4-3 REAR DOOR

I Turn the handle to open the rear door to get access to the engine (On early loaders). Pull the lock pin on the right side of the rear door (Fig. 4-3). Open the rear door to the left.

Remove the rear door by disconnecting the battery cables and lifting the door from the hinges. Assembly is reverse of removal.

On 310 Loaders (SIN 11379 & Below) see BTl Bulletin when rear door comes loose at the lower hinge.

4-4 FUEL TANK

The fuel tank is supported by two rubber straps under the tank and four rubber blocks on the top. Install new rubber straps and blocks if the tank has become loose within the frame.

4-4.1 Removal of Fuel Tank

To remove the fuel tank:

(1) Remove the fuel fill tube.

(2) Remove the engine and mount plate.

(3) Remove the fuel tank.

4-4.2 Assembly of Fuel tank

* Fig.4-3 Door latch

2-3/4" -"-*'-8-3/4

* Fig. 4-4 Install Rubber Bumpers on Fuel Tank

(1) Install new rubber parts onto the fuel tank with rubber cement (Fig. 4-4).

I NOTE: The rubber blocks are held in place with cement. Make sure the tank surface is clean & dry.

(2) Install the fuel tank.

(3) Install the engine and mount plate.

(4) Install the fuel fill tube.

4-5 LIFT ARM SUPPORT BRACKET

Use a lift arm support bracket when the lift arms must be in the raised position for maintenance. A support bracket can be made from a 23-3/4" long by 3" wide piece of channel iron (Fig. 4- 51. A support bracket is available as an accessory parts item.

-4-2-

D-1327R

8-2925

8-1479

Fig. 4-5 lift Arm Support Bracket

310.313 Loader Service Manual

ELECTRICAL SYSTEM

Paragraph Number

ALTERNATOR SERVICE (313) ............ 5-4 CHARGE SYSTEM CHECKS (310) ........ 5-2 CLUTCH, TO SERVICE RANGE CONTROL 5-5 ELECTRICAL SySTEM ................... 5-1 STARTER SERVICE (310) ................ 5-5 STARTER SERVICE (313) ................ 5-6

Page Number

5-9 5-7

5-10 5-1

5-11 5-13

ELECTRICAL SYSTEM

310.313 Loader Service Manual

--

~:..

5-2 CHARGE SYSTEM SERVICE (310)

Adjustment of the charging circuit cannot be made. The rectifier/regulator is a sealed unit. Replace any part that has a defect. A defective rectifier/regulator will often have an odor.

NOTE: Disconnect the wires from rectifier/regulator while welding on the Bobcat.

Use the following procedure to find a defect in the charge system.

PROBLEM CAUSE CORRECTION

Battery has defect. Electrolyte level is low. Add distilled water.

, .;;<-Specific gravity is low. Charge battery.

A cell is dead. Battery replacement.

Battery has low or no Moisture in ignition Ch~r.g~L switch.

No charge to battery.

Battery has defect.

Engine does not have electric ground.

Excessive charge to The rectifier/regulator is battery (battery uses not operating correctly. excessive amount of water or feels hot to touch).

NOTE: Do not run the engine without a battery in the system. It will cause damage to the rectifier/regulator unit.

5-3 CHARGE SYSTEM CHECKS (310)

Test No.1 (Fig. 5-3)

Charging System Test

Remove orange wire. Connect all other wires. Insert a small blade into the regulator end of connector to release the retainer on the spade terminal. Pulloutthe wire.

Ref. Item

1. Rectifier 2. Wire Harness 3. Ignition Coil 4. Starter Solenoid 5. Starter Switch 6. Battery Cable 7. Battery

Clean switch.

Do test 1 &2.

00 test 3.

Make ground engine to frame.

00 test 3.

Connect a red OC voltmeter wire to the B + terminal on rectifer/regulator. Connect the black wire from the voltmeter to ground. Run the engine at full throttle with no load. Check the voltage. Fig. 5-3 Test No.1

-5-7-

from

PI-2267

310,313 Loader Service Manual

-,

ENGINE

Paragraph Number

AUTOMATIC COMPRESSION RELEASE .. . 6-4 CARBURETOR ......................... . 6-1,6-12 ENGINE COMPRESSION .............. .. . 6-3 ENGINE SHOCK SUPPORT ............. . 6-6 ENGINE, ASSEMBLY OF ............... . 6-10 ENGINE, DISASSEMBLY AND

INSPECTION . ........................ . 6-9 ENGINE, REPAIR AND REPLACEMENT OF 6-7 ENGINE, TO OVERHAUL ............... . 6-8 ENGINE, TO START A RECONDITIONED. 6-11 FUEL PUMP ........................... . 6-2 GOVERNOR ............................ . 6-3

Page Number

6-5 6-1,6-15

6-5 6-6

6-12

6-6 6-6 6-6

6-15 6-4 6-5

ENGINE (310)

310,313 Loader Service Manual

SPECIFICATIONS

Paragraph Number

DECIMAL AND MILLIMETER EQUIVALENT HYDRAULIC FLUID ..................... 8-3 SPECIFICATIONS, ENGINE (310) ......... 8-5 SPECIFICATIONS, ENGINE (313) ......... 8-6 SPECIFICATIONS, ENGINE OIL ........... 8-2 SPECIFICATIONS, FUEL ................. 8-1 SPECIFICATIONS, LOADER (310) ......... SPECIFICATIONS, LOADER (313) ......... 8-4 SPECIFICATIONS, TORQUE .............. 8-4 SPECIFICATIONS, TORQUE FOR BOLTS .. U.S. TO METRIC CONVERSiON ..........

Page Number

8-7 8-1 8-3 8-6 8-1 8-1 8-2 8-3 8-3 8-8 8-9

TECHNICAL DATA

310. 313 Loader Service Manual

: ~

ENGINE SERVICE

Air Cleaner

Carburetor

Cooling System

Crankcase Breather

Electrical System

Ignition System

LPG System

Oil Service

Troubleshooting

3

4

3

3

7

5

5

3

9

ENGINE

M-371 Loader Service Manual

---- -- ------------- ----

HYDRAULIC SYSTEM SERVICE

',.

Control Valve

Hydraulic Fluid Filter

Hydraulic Fluid Reservoir

Hydraulic System Description

Hydraulic Tests

Pedal Linkage Adjustment

Pump Drive Belt Adjustment

Troubleshooting

.16

.14

.13

.13

.15

.16

.16

.18

'HYDR SYSTEM

M·371 Loader Service Manual

DESCRIPTION OF HYDRAULIC CIRCUIT

Hydraulic fluid is drawn from the reservo i r through the filter by the hydraulic pump. The pump forces the fluid through the control valve and back to the pump/reservoir (Fig. 15). This occurs when the control pedals are in neutral.

When a control is activated, fluid is diverted into one end of the selected cylinders. Fluid flows from the other end of the double·acting cylinders back to the control valve bank and on to the pump/reservoir. When the control pedal is returned to neutral, fluid is trapped in the cylinders, holding the load in place.

Fig. 16 shows fluid flow path when a pedal is depressed. When a cylinder

. reaches the end of its stroke or when the load exceeds the machines rated lifting capacity, a relief valve opens. This allows the fluid to by· pass the overloaded circuit and return to the pump/reservoir. The relief valve is pre-set to open at 1200 PSI at full engine RPM. Do not change the relief setting unless a hydraulic check shows that it is too low or too high (See "Testing the Hydraulic System").

CHECKING HYDRAULIC FLUID

To check the hydraulic fluid level, drive the Bobcat onto a level surface. Check the fluid level on the dipstick attached to the fi lIer cap (F ig. 17) or, on later model machines, at the lower check plug on the right side of the machine (Fig. 18). If low, add approved fluid (Refer to page 58 for type) to the full mark on the dipstick or the upper check plug. Slightly over filling will not interfere with the operation of the machine.

DRAINING CONDENSATION

Condensation should be drained from the reservoir frequently when the loader is operated in a high humidity environment.

Raise the rear of the Bobcat so that the rear wheels are several inches off the ground. Leave it in this position for 3 to 4 hours. Remove the drain plug (located at the lower front of the reservoir/transmission case) just long enough to permit accumulated water to drain out. Check the fluid level after lowering the Bobcat and add fluid, if required.

Fig. 15 Hydraulic Circuit

Fig. 16 Hydraulic Cylinder Action & Fluid Flow

-13-

A-1440

M·371 Loader Service Manual

TRACTION DRIVE SYSTEM SERVICE

Clutch Adjustment

Description of Drive

Drive Chain Adjustment

Troubleshooting

.21

.21

.22

.24

DRIVE SYSTEM

M-371 Loader Service Manual

MAJOR OVERHAUL

ENGINE OVERHAUL

HYDRAULIC SYSTEM OVERHAUL

LOADER MAIN FRAME OVERHAUL

SPECIFICATIONS

TRACTION DRIVE SYSTEM OVERHAUL

.27

.45

.55

.57

.49

MAJOR I

OVERHAUL

ENGINE .

HYDR SYSTEM'

MAIN FRAME

SPECS

DRIVE SYSTEM

M-371 Loader Service Manual

. ...,i,;.

ENGINE OVERHAUL

Electrical System

Engine Overhaul Procedures

Engine Reassembly

Engine Reconditioning

Engine Specifications

Final Adjustments

Inspection . Disassembly

LPG Fuel System Reconditioning

.41

.27

.33'

.29

.39

.36

.28

• '.IT

ENGINE

M-371 Loader Service Manual

HYDRAULIC SYSTEM OVERHAUL

Control Valve Bank

Hydraulic Cylinders

Hydraulic Pump

Lift Cylinder Line Restrictor

.47

.45

.46

.48

HVDR- , ~.;ySTEM ~

M-371 Loader Service Manual

TRACTION DRIVE SYSTEM OVERHAUL

Axle Removal .

Chain Installation

Chain Removal

Clutches

Lower Jackshaft

Steering Linkage

Transmission Case and Cover

Upper Jackshaft

.53

.49

.49

.50

.51

.50

.54

.52

DRIVE . SYSTEM, . . .

M-371 Loader Service Manual

.~---~----~.~

"'f'"

LOADER MAIN FRAME OVERHAUL

Bob·Tach • . . ..... .

Boom Alignment . . . . . .

Boom Cylinder Support Bracket

Fuel Tank

.55

.55

.55

.55

MAIN FRAME

Mo371 Loeder Service: Manual

Loader Specifications

Machine Torques . .

SPECIFICATIONS

.57

.58

. SPECS ~ ""'-

M-371 Loader

Service Manual