cat 3408 serie gbn1.. sebu6682-08 m

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MAINTENANCE INTERVALSOperation and Maintenance Manual Excerpt

SEBU6682-08May 2006

Operation andMaintenanceManualG3408 and G3412 Engines6NB1-Up (Engine)7DB1-Up (Engine)6RJ1-Up (Engine)3NK1-Up (Engine)

SEBU6682-08 69Maintenance Section

Maintenance Interval Schedule

i02522249

Maintenance Interval Schedule(Turbocharged AftercooledEngines)SMCS Code: 1000; 4450; 7500

Ensure that all safety information, warnings andinstructions are read and understood before anyoperation or any maintenance procedures areperformed.

The user is responsible for the performance ofmaintenance, including all adjustments, the use ofproper lubricants, fluids, filters, and the replacementof components due to normal wear and aging. Failureto adhere to proper maintenance intervals andprocedures may result in diminished performance ofthe product and/or accelerated wear of components.

Use mileage, fuel consumption, service hours, orcalendar time, WHICHEVER OCCURS FIRST,in order to determine the maintenance intervals.Products that operate in severe operating conditionsmay require more frequent maintenance.

Note: Before each consecutive interval is performed,all maintenance from the previous interval must beperformed.

When Required

Batteries - Replace ............................................... 77Engine Air Cleaner Element - Replace ................. 91Overhaul Considerations .................................... 121Valve Stem Projection - Measure/Record ........... 127

Daily

Air Starting Motor Lubricator Oil Level - Check .... 75Air Tank Moisture and Sediment - Drain ............... 76Control Panel - Inspect ......................................... 83Cooling System Coolant Level - Check ................ 86Driven Equipment - Inspect/Replace/Lubricate ... 91Engine Air Cleaner Service Indicator - Inspect ..... 93Engine Air Precleaner - Clean .............................. 94Engine Oil Level - Check ...................................... 97Fuel System Fuel Filter Differential Pressure -Check ................................................................ 103Instrument Panel - Inspect ................................... 113Walk-Around Inspection ...................................... 129

Every 250 Service Hours

Engine Oil Sample - Obtain .................................. 98


Aftercooler Core - Clean/Test ............................... 74Battery Electrolyte Level - Check .......................... 78

Belts - Inspect/Adjust/Replace .............................. 82Cooling System Coolant Sample (Level 1) -Obtain ................................................................. 86Cooling System Supplemental Coolant Additive(SCA) - Test/Add ................................................. 87Crankshaft Vibration Damper - Inspect ................. 89Engine - Clean ...................................................... 91Engine Oil and Filter - Change ............................. 99Engine Valve Lash - Inspect/Adjust .................... 101Engine Valve Rotators - Inspect ......................... 102Exhaust Piping - Inspect ..................................... 103Gas Pressure Regulator - Check ........................ 103Hoses and Clamps - Replace ............................. 107Ignition System Spark Plugs - Check/Adjust/Replace ............................................................. 108Ignition System Timing - Check/Adjust ................ 113Inlet Air System - Inspect ..................................... 113Radiator - Clean .................................................. 123

Initial 750 Service Hours

Valve Stem Projection - Measure/Record ........... 127


Actuator Control Linkage - Lubricate .................... 74Carburetor Air/Fuel Ratio - Check/Adjust ............. 83Crankcase Blowby - Measure/Record .................. 88Cylinder Pressure - Measure/Record ................... 89Engine Crankcase Breather - Clean ..................... 95Engine Oil Filter (Auxiliary) - Change ................... 96Engine Protective Devices - Check .................... 101Engine Speed/Timing Sensor - Clean/Inspect .... 101Speed Sensor - Clean/Inspect ............................ 123


Air Starting Motor Lubricator Bowl - Clean ........... 75Cooling System Coolant Sample (Level 2) -Obtain ................................................................. 87Driven Equipment - Check .................................... 90Engine Mounts - Check ........................................ 95Ignition System Transformer Resistance - Test ... 113Inlet Air System - Inspect ..................................... 113Starting Motor - Inspect ...................................... 125Water Pump - Inspect ......................................... 131


Alternator - Inspect ............................................... 76


Turbocharger - Inspect ........................................ 126

Between 9000 and 12 000 Service Hours

Overhaul (Top End) .............................................. 119

Between 18 000 and 24 000 Service Hours

Overhaul (Major) .................................................. 117

70 SEBU6682-08Maintenance SectionMaintenance Interval Schedule

Every 24 000 Service Hours or 3 Years

Cooling System Coolant (NGEC) - Change .......... 84



i02522248

Maintenance Interval Schedule(Naturally Aspirated Engines)SMCS Code: 1000; 4450; 7500





When Required

Batteries - Replace ............................................... 77Engine Air Cleaner Element - Replace ................. 91Overhaul Considerations .................................... 121Valve Stem Projection - Measure/Record ........... 127

Daily

Air Starting Motor Lubricator Oil Level - Check .... 75Air Tank Moisture and Sediment - Drain ............... 76Control Panel - Inspect ......................................... 83Cooling System Coolant Level - Check ................ 86Driven Equipment - Inspect/Replace/Lubricate ... 91Engine Air Cleaner Service Indicator - Inspect ..... 93Engine Air Precleaner - Clean .............................. 94Engine Oil Level - Check ...................................... 97Fuel System Fuel Filter Differential Pressure -Check ................................................................ 103Instrument Panel - Inspect ................................... 113Walk-Around Inspection ...................................... 129


Engine Oil Sample - Obtain .................................. 98


Battery Electrolyte Level - Check .......................... 78Belts - Inspect/Adjust/Replace .............................. 82Cooling System Coolant Sample (Level 1) -Obtain ................................................................. 86

Cooling System Supplemental Coolant Additive(SCA) - Test/Add ................................................. 87Crankshaft Vibration Damper - Inspect ................. 89Engine - Clean ...................................................... 91Engine Oil and Filter - Change ............................. 99Exhaust Piping - Inspect ..................................... 103Hoses and Clamps - Replace ............................. 107Ignition System Spark Plugs - Check/Adjust/Replace ............................................................. 108Ignition System Timing - Check/Adjust ................ 113Inlet Air System - Inspect ..................................... 113Radiator - Clean .................................................. 123

Initial 750 Service Hours

Engine Valve Lash - Inspect/Adjust .................... 101Engine Valve Rotators - Inspect ......................... 102Gas Pressure Regulator - Check ........................ 103Valve Stem Projection - Measure/Record ........... 127


Actuator Control Linkage - Lubricate .................... 74Carburetor Air/Fuel Ratio - Check/Adjust ............. 83Crankcase Blowby - Measure/Record .................. 88Cylinder Pressure - Measure/Record ................... 89Engine Crankcase Breather - Clean ..................... 95Engine Oil Filter (Auxiliary) - Change ................... 96Engine Protective Devices - Check .................... 101Engine Speed/Timing Sensor - Clean/Inspect .... 101Engine Valve Lash - Inspect/Adjust .................... 101Engine Valve Rotators - Inspect ......................... 102Gas Pressure Regulator - Check ........................ 103Speed Sensor - Clean/Inspect ............................ 123


Air Starting Motor Lubricator Bowl - Clean ........... 75Cooling System Coolant Sample (Level 2) -Obtain ................................................................. 87Driven Equipment - Check .................................... 90Engine Mounts - Check ........................................ 95Ignition System Transformer Resistance - Test ... 113Inlet Air System - Inspect ..................................... 113Starting Motor - Inspect ...................................... 125Water Pump - Inspect ......................................... 131


Alternator - Inspect ............................................... 76


Overhaul (Top End) .............................................. 119


Overhaul (Major) .................................................. 117

Every 24 000 Service Hours or 3 Years

Cooling System Coolant (NGEC) - Change .......... 84

72 SEBU6682-08Maintenance SectionMaintenance Interval Schedule

i02522245

Maintenance Interval Schedule(Standby Generator SetEngines)SMCS Code: 1000; 4450; 7500





When Required

Generator - Dry ................................................... 104Generator Set - Test ........................................... 106Varistor - Test ...................................................... 129Winding - Test ..................................................... 132

Daily

Generator Load - Check ..................................... 105Power Factor - Check ......................................... 122Stator Winding Temperature - Measure/Record .. 126

Every Week

Air Starting Motor Lubricator Oil Level - Check .... 75Air Tank Moisture and Sediment - Drain ............... 76Automatic Start/Stop - Inspect .............................. 76Battery Charger - Check ....................................... 77Battery Electrolyte Level - Check .......................... 78Bearing Temperature - Measure/Record .............. 82Control Panel - Inspect ......................................... 83Cooling System Coolant Level - Check ................ 86Engine Air Cleaner Service Indicator - Inspect ..... 93Engine Air Precleaner - Clean .............................. 94Engine Oil Level - Check ...................................... 97Fuel System Fuel Filter Differential Pressure -Check ................................................................ 103Instrument Panel - Inspect ................................... 113Jacket Water Heater - Check ............................... 117

Space Heater - Check ........................................ 123Standby Generator Set MaintenanceRecommendations ............................................ 124Walk-Around Inspection ...................................... 130

Every 250 Service Hours or 1 Year

Engine Oil and Filter - Change ............................. 99

Every 6 Months

Stator Lead - Check ............................................ 125

Every Year

Actuator Control Linkage - Lubricate .................... 74Aftercooler Core - Clean/Test ............................... 74Air Starting Motor Lubricator Bowl - Clean ........... 75Alternator - Inspect ............................................... 76Bearing (Ball) - Lubricate ...................................... 78Belts - Inspect/Adjust/Replace .............................. 82Carburetor Air/Fuel Ratio - Check/Adjust ............. 83Cooling System Coolant Sample (Level 1) -Obtain ................................................................. 86Cooling System Coolant Sample (Level 2) -Obtain ................................................................. 87Cooling System Supplemental Coolant Additive(SCA) - Test/Add ................................................. 87Crankcase Blowby - Measure/Record .................. 88Crankshaft Vibration Damper - Inspect ................. 89Cylinder Pressure - Measure/Record ................... 89Engine - Clean ...................................................... 91Engine Air Cleaner Element - Replace ................. 91Engine Crankcase Breather - Clean ..................... 95Engine Mounts - Check ........................................ 95Engine Oil Sample - Obtain .................................. 98Engine Performance - Test ................................. 101Engine Protective Devices - Check .................... 101Engine Speed/Timing Sensor - Clean/Inspect .... 101Engine Valve Lash - Inspect/Adjust .................... 101Engine Valve Rotators - Inspect ......................... 102Gas Pressure Regulator - Check ........................ 103Generator Set Vibration - Inspect ....................... 107Ignition System Spark Plugs - Check/Adjust/Replace ............................................................. 108Ignition System Timing - Check/Adjust ................ 113Inlet Air System - Inspect ..................................... 113Insulation - Test .................................................... 114Radiator - Clean .................................................. 123Speed Sensor - Clean/Inspect ............................ 123Starting Motor - Inspect ...................................... 125Turbocharger - Inspect ........................................ 126Water Pump - Inspect ......................................... 131

Every 3 Years

Batteries - Replace ............................................... 77Cooling System Coolant (NGEC) - Change .......... 84Exhaust Bypass - Inspect ................................... 102Exhaust Piping - Inspect ..................................... 103Governor - Inspect .............................................. 107Hoses and Clamps - Replace ............................. 107



Ignition System Spark Plug Wires - Replace ...... 107Ignition System Transformer Resistance - Test ... 113Water Temperature Regulator - Replace ............ 131

Overhaul

Bearing - Inspect ................................................... 79

74 SEBU6682-08Maintenance SectionActuator Control Linkage - Lubricate

i01616158

Actuator Control Linkage -LubricateSMCS Code: 1265-086

g00836634Illustration 58Grease fitting on the linkage for the governor control lever

g00836635Illustration 59Grease fitting on the linkage for the throttle control

Lubricate the grease fittings with MPGM.

Check the LinkageCheck the linkage for proper operation. Adjust thelinkage, if necessary. For instructions on adjustmentof the linkage, refer to the engines Specifications.

i01371758

Aftercooler Core - Clean/Test(Air-To-Air Aftercooler)SMCS Code: 1064-070; 1064-081; 1064

Note: Adjust the frequency of cleaning according tothe effects of the operating environment.

Inspect the aftercooler for these items: damaged fins,corrosion, dirt, grease, insects, leaves, oil, and otherdebris. Clean the aftercooler, if necessary.

For air-to-air aftercoolers, use the same methods thatare used for cleaning radiators.

Personal injury can result from air pressure.

Personal injury can result without following prop-er procedure.When using pressure air, wear a pro-tective face shield and protective clothing.

Maximum air pressure at the nozzle must be lessthan 205 kPa (30 psi) for cleaning purposes.

Pressurized air is the preferred method for removingloose debris. Direct the air in the opposite directionof the fans air flow. Hold the nozzle approximately6 mm (0.25 inch) away from the fins. Slowly move theair nozzle in a direction that is parallel with the tubes.This will remove debris that is between the tubes.

Pressurized water may also be used for cleaning.The maximum water pressure for cleaning purposesmust be less than 275 kPa (40 psi). Use pressurizedwater in order to soften mud. Clean the core fromboth sides.

Use a degreaser and steam for removal of oil andgrease. Clean both sides of the core. Wash the corewith detergent and hot water. Thoroughly rinse thecore with clean water.

After cleaning, start the engine and accelerate theengine to high idle rpm. This will help in the removalof debris and drying of the core. Stop the engine.Use a light bulb behind the core in order to inspectthe core for cleanliness. Repeat the cleaning, ifnecessary.

Inspect the fins for damage. Bent fins may be openedwith a comb.

Note: If parts of the aftercooler system are repairedor replaced, a leak test is highly recommended.

Inspect these items for good condition: welds,mounting brackets, air lines, connections, clamps,and seals. Make repairs, if necessary.

For more detailed information on cleaning andinspection, see Special Publication, SEBD0518,Know Your Cooling System.


Air Starting Motor Lubricator Bowl - Clean

i02344769

Air Starting Motor LubricatorBowl - CleanSMCS Code: 1451-070

If the engine is equipped with an air starting motor,use the following procedure:

Personal injury can result from removing hoses orfittings in a pressure system.

Failure to relieve pressure can cause personal in-jury.

Do not disconnect or remove hoses or fittings un-til all pressure in the system has been relieved.

1. Ensure that the air supply to the lubricator is OFF.

g00745554Illustration 60(1) Filler plug(2) Bowl(3) Drain valve

2. Slowly loosen filler plug (1) in order to release thepressure from the lubricator.

NOTICECare must be taken to ensure that fluids are containedduring performance of inspection, maintenance, test-ing, adjusting and repair of the product. Be prepared tocollect the fluid with suitable containers before open-ing any compartment or disassembling any compo-nent containing fluids.

Refer to Special Publication, NENG2500, CaterpillarDealer Service Tool Catalog for tools and suppliessuitable to collect and contain fluids on Caterpillarproducts.

Dispose of all fluids according to local regulations andmandates.

3. Place a suitable container under bowl (2) andopen drain valve (3) in order to drain the oil fromthe bowl.

4. Remove bowl (2). Clean the bowl with warm water.

5. Dry the bowl. Inspect the bowl for cracks. If thebowl is cracked, replace the damaged bowl witha new bowl. Inspect the gasket. If the gasket isdamaged, replace the gasket.

6. Install the bowl.

7. Make sure that drain valve (3) is closed.

8. For instructions on filling the lubricator, see thisOperation and Maintenance Manual, Air StartingMotor Lubricator Oil Level - Check topic.

i02213914

Air Starting Motor LubricatorOil Level - CheckSMCS Code: 1451-535

NOTICENever allow the lubricator bowl to become empty. Theair starting motor will be damaged by a lack of lubrica-tion. Ensure that sufficient oil is in the lubricator bowl.

g00745561Illustration 61

1. Observe the oil level in sight gauge (3). If the oillevel is less than 1/2, add oil to the lubricator bowl.

76 SEBU6682-08Maintenance SectionAir Tank Moisture and Sediment - Drain

Personal injury can result from removing hoses orfittings in a pressure system.

Failure to relieve pressure can cause personal in-jury.

Do not disconnect or remove hoses or fittings un-til all pressure in the system has been relieved.

2. Ensure that the air supply to the lubricator is OFF.Slowly loosen filler plug (4) in order to releasepressure from the lubricator bowl.

3. Remove filler plug (4). Pour oil into the lubricatorbowl. Use nondetergent SAE 10W oil fortemperatures that are greater than 0 C (32 F).Use air tool oil for temperatures that are below0 C (32 F).

4. Install filler plug (4).

Adjust the LubricatorNote: Adjust the lubricator with a constant rate of airflow. After the adjustment, the lubricator will releaseoil in proportion to variations of the air flow.

1. Ensure that the fuel supply to the engine is OFF.

NOTICEDo not crank the engine continuously for more than30 seconds. Allow the starting motor to cool for twominutes before cranking the engine again.

2. Operate the air starting motor. Observe the dropsof oil that are released in dome (1).

Note: Some lubricators have an adjustment screwrather than a knob.

3. If necessary, adjust the lubricator in orderto release from one to three drops of oil persecond. To increase the rate, turn knob (2)counterclockwise. To decrease the rate, turn theknob clockwise.

i00351324

Air Tank Moisture andSediment - DrainSMCS Code: 1466-543-M&S

Moisture and sediment in the air starting system cancause the following conditions:

Freezing

Corrosion of internal parts

Malfunction of the air starting system

When opening the drain valve, wear protectivegloves, a protective face shield, protective cloth-ing, and protective shoes. Pressurized air couldcause debris to be blown and result in personalinjury.

1. Open the drain valve that is on the bottom of theair tank. Allow the moisture and sediment to drain.

2. Close the drain valve.

i02084374

Alternator - InspectSMCS Code: 1405-040

Inspect the alternator for the following conditions:

Proper connections

Clean ports for cooling airflow

Proper charging of the battery

Observe the ammeter during engine operation inorder to ensure proper battery performance and/orproper performance of the electrical system.

Make repairs, if necessary. See the Service Manualfor service procedures. Consult your Caterpillardealer for assistance.

i01039675

Automatic Start/Stop - Inspect(Generator Set)SMCS Code: 4462

The generator set must be ready to operate under aload at any time. After performing maintenance onthe generator set, inspect the position of the controlswitches. Ensure the following conditions:

The starting system is enabled.

The control switches are in the correct position forautomatic starting.

SEBU6682-08 77Maintenance SectionBatteries - Replace

The switchgear and the automatic transfer switchesthat are associated with the generator are enabled.

For more information, see the Operation andMaintenance Manual for the generator and thecontrol panel.

i01041029

Batteries - ReplaceSMCS Code: 1401-510

Batteries give off combustible gases which canexplode. A spark can cause the combustible gas-es to ignite. This can result in severe personal in-jury or death.

Ensure proper ventilation for batteries that are inan enclosure. Follow the proper procedures in or-der to help prevent electrical arcs and/or sparksnear batteries. Do not smoke when batteries areserviced.

1. Turn the key start switch to the OFF position.Remove the key and all electrical loads.

2. Turn OFF the battery charger. Disconnect thecharger.

3. The NEGATIVE - cable connects the NEGATIVE- battery terminal to the ground plane. Disconnectthe cable from the NEGATIVE - battery terminal.

4. The POSITIVE + cable connects the POSITIVE+ battery terminal to the starting motor.Disconnect the cable from the POSITIVE +battery terminal.

Note: Always recycle a battery. Never discard abattery. Return used batteries to an appropriaterecycling facility.

5. Remove the used battery.

6. Install the new battery.

Note: Before connecting the cables, ensure that thekey start switch is OFF.

7. Connect the cable from the starting motor to thePOSITIVE + battery terminal.

8. Connect the cable from the ground plane to theNEGATIVE - battery terminal.

i01039758

Battery Charger - CheckSMCS Code: 1401-535

Checking Before Start-UpCheck the battery charger for proper operation. Ifthe batteries are properly charged, the needle of theammeter will register near 0 (zero).

The battery charger must not produce excessivecurrent during start-up. Alternatively, the chargermust be automatically disconnected for start-up.If the engine has an alternator, the charger mustbe automatically disconnected during start-up andduring engine operation.

Charging the Battery

Never disconnect any charging unit circuit or bat-tery circuit cable from the battery when the charg-ing unit is operated. A spark can cause an explo-sion from the flammable vapor mixture of hydro-gen and oxygen that is released from the elec-trolyte through the battery outlets. Injury to per-sonnel can be the result.

Perform the following procedure to charge thebattery:

1. Ensure that the charger is turned OFF.

2. Adjust the voltage of the charger in order to matchthe voltage of the battery.

3. Connect the POSITIVE + lead of the chargerto the POSITIVE + battery terminal. Connectthe NEGATIVE - lead of the charger to theNEGATIVE - battery terminal.

4. Turn ON the battery charger.

Overcharging of Batteries

Overcharging reduces the service life of batteries.Use a battery charger that will not overcharge thebattery. DO NOT charge the battery if the meter ofthe battery charger is in the RED zone.

Overcharging is indicated by the following symptoms:

The battery is very warm to the touch.

A strong odor of acid is present.

The battery emits smoke or a dense vapor (gas).

78 SEBU6682-08Maintenance SectionBattery Electrolyte Level - Check

Perform one of the following procedures if the batteryshows symptoms of overcharging:

Reduce the rate of charging by a significantamount. Complete the charging at the reducedrate.

Turn OFF the charger.

Table 21 describes the effects of overcharging ondifferent types of batteries.

Table 21

Effects of Overcharging Batteries

Type of Battery Effect

All of the battery cells havea low level of electrolyte.

When the plates of thebattery are inspectedthrough the filler holes, theplates may appear to bewarped. This is caused byan excessive temperature.

Caterpillar General ServiceBatteriesCaterpillar Premium HighOutput Batteries

The battery may not passa load test.

The battery may not accepta charging current.

Caterpillar MaintenanceFree Batteries

The battery may not passa load test.

Checking After StoppingEnsure that the battery charger is connectedproperly. Observe the meter of the charger. Recordthe amperage.

i02340858

Battery Electrolyte Level -CheckSMCS Code: 1401-535-FLV

When the engine is not run for long periods of time orwhen the engine is run for short periods, the batteriesmay not fully recharge. Ensure a full charge in orderto help prevent the battery from freezing. If batteriesare properly charged, ammeter reading should bevery near zero, when the engine is in operation.

All lead-acid batteries contain sulfuric acid whichcan burn the skin and clothing. Always wear a faceshield and protective clothing when working on ornear batteries.

1. Remove the filler caps. Maintain the electrolytelevel to the FULL mark on the battery.

If the addition of water is necessary, use distilledwater. If distilled water is not available use cleanwater that is low in minerals. Do not use artificiallysoftened water.

2. Check the condition of the electrolyte with the245-5829 Coolant Battery Tester Refractometer.

3. Keep the batteries clean.

Clean the battery case with one of the followingcleaning solutions:

A mixture of 0.1 kg (0.2 lb) of baking soda and1 L (1 qt) of clean water

A mixture of 0.1 L (0.11 qt) of ammonia and 1 L(1 qt) of clean water

Thoroughly rinse the battery case with clean water.

Use a fine grade of sandpaper to clean theterminals and the cable clamps. Clean the itemsuntil the surfaces are bright or shiny. DO NOTremove material excessively. Excessive removalof material can cause the clamps to not fit properly.Coat the clamps and the terminals with 5N-5561Silicone Lubricant, petroleum jelly or MPGM.

i02023749

Bearing (Ball) - Lubricate(Generator)SMCS Code: 4471-086

The following ball bearings must be lubricated:no shield and single shield. Double shielded ballbearings may not require lubrication. Refer to theinstructions that are located on the machine.

For ball bearings, use Caterpillar 2S-3230 BearingLubricant. This grease is an NLGI No. 2 Grade.There is Polyurea (a thickener) in this grease. Thetemperature range of Caterpillar 2S-3230 BearingLubricant is 29 C (20.2 F) to 177 C (350.6 F).For extremely low temperatures, use either NLGI No.1 Grade or NLGI No. 0 Grade.


Bearing - Inspect

Lubricating Process1. Remove either the louver assembly or the rearplate from the rear of the generator housing.

2. Remove the top grease pipe plug and remove thelower grease pipe plug.

3. Install a grease fitting in the grease pipe.

4. Grease the shielded ball bearings with 2S-3230Bearing Lubricant (53.28 mL (1.8 ounces) to59.20 mL (2.0 ounces)). Lubricate shielded ballbearings at 2000 hour intervals. Do not mixgreases.

Note: Some two-bearing generators have sphericalroller bearings in the front bracket and ball bearings inthe rear bracket. These units should use a common108-8611 Grease Cartridge. This grease should beused for the front bearing and the rear bearing.

5. Wipe off the excess grease. Remove the topgrease fitting. Install the plug.

6. Operate the generator for one hour. This will allowthe grease to expand. The expanding grease willforce the excess grease from the cavity. Whenthe excess grease is forced from the cavity, theinternal pressure will be reduced. The generatorshould continue to operate until the grease stopspurging.

7. Stop the engine. Install the plug in the bottomgrease pipe. Wipe off the excess grease.

8. Install the louver assembly or install the rear plate.

i02230503

Bearing - InspectSMCS Code: 4471-040

The following maintenance procedure for generatorbearings should be followed at every major engineoverhaul:

1. Remove the bearing bracket. Inspect the followingitems: bracket bore, bearing outer race, androlling elements. On standby power units, thebearing must be inspected and the grease mustbe replaced at three year intervals. The sleevefor the bearing bracket should be inspected forout of roundness, excessive wear, and a bracketstep that is less than 0.0762 mm (0.0030 inch). Ifthere is no sleeve for the bearing bracket, inspectthe bore for the bearing bracket. The bearingshould be inspected for damage to the outer race,severe fretting, and smoothness of operation.When possible, the bearing elements should beinspected. Some double shielded ball bearingsprevent visual inspection of the ball bearings.Other double shielded ball bearings have aretaining ring. This retaining ring can be removedin order to allow access for a visual inspection ofthe ball bearings.

On two-bearing generators, the front bearing canonly be removed after the hub is removed. In orderto remove the hub, cut off the hub. Pulling the hubwill damage the shaft.

Note: Bearings that are being removed for failureanalysis should not be cut off with a torch.

2. Spherical Roller Bearing should be cleaned andrepacked with 108-8611 Grease. Pack thebearing and pack the cavity (one-third to one-halfof the volume of the cavity). The bearing shouldbe filled with 88.8 mL (3 ounces) to 118.4 mL(4 ounces) of grease. The cavity should be filledwith 118.4 mL (4 ounces) to 148.0 mL (5 ounces)of grease. Refer to Table 22.

3. All ball bearings should be cleaned. The cavity ofthe bracket should be repacked with 2S-3230Grease. Pack the bearings (one-third to one-halfof the volume of the cavity). Refer to Table 22.

To reinstall bearings, heat the bearings to 107 C(224.6 F) for ten minutes. Mount the bearingson the shaft. To reinstall the hub, heat the hub to400 C (752.0 F) for three hours. Mount the hubto the shaft.

4. Ensure that the tube that supplies grease to thebearing is filled with grease.

5. Remove the bracket drain plug and operate thegenerator for one hour. This will allow the greaseto expand. The expanding grease will force theexcess grease from the cavity. When the excessgrease is forced from the cavity, the internalpressure will be reduced. The generator shouldcontinue to operate until the grease stops purging.

6. Stop the engine. Install the bracket drain plug.Wipe off the excess grease.

80 SEBU6682-08Maintenance SectionBearing - Inspect

7. For greasing intervals, follow the recommendationson the lubrication plate (if equipped) or refer toMaintenance Schedule, Bearing - Lubricate.Whenever the bearings are greased, repeat Step5. DO NOT MIX GREASES.

Table 22

BearingOutsideDiametermm (inch)

BearingInsideDiametermm (inch)

PartNumber

GeneratorFrameSize

Bearing Borein Bracketmm (inch)

BearingShield(Type)

BearingCavityGreasemL (oz)

Rotor ShaftDiametermm (inch)

100.000 mm(3.9370 inch)

45.000 mm(1.7717 inch)

5P-1977 All 360 100.000 mm(3.9370 inch)

to100.025 mm(3.9380 inch)

Double 29.6 mL(1 oz)

45.004 mm(1.7718inch)to

45.019 mm(1.7724inch)

140.000 mm(5.5118 inch)

65.000 mm(2.5591 inch)

3N-1965 440(round

laminated)

140.002 mm(5.5119 inch)

to140.028 mm(5.5129 inch)

Double 53.280 mL(1.8 oz)(1)

to94.720 mL(3.2 oz)(2)

65.004 mm(2.5592inch)to

65.021 mm(2.5599inch)

160.000 mm(6.2992 inch)

75.000 mm(2.9527 inch)

5P-2448 580(2)590(1)

160.002 mm(6.2993 inch)

to160.028 mm(6.3003 inch)

Double 100.64 mL(3.4 oz)to

168.72 mL(5.7 oz)

75.004 mm(2.9529inch)to

75.021 mm(2.9536inch)

170.000 mm(6.6929 inch)

80.000 mm(3.1496 inch)

4L-6677(3) 580(1) 170.002 mm(6.6930 inch)

to170.028 mm(6.6940 inch)

Single 97.68 mL(3.3 oz)to

162.80 mL(5.5 oz)

80.002 mm(3.1497inch)to

80.020 mm(3.1504inch)

170.000 mm(6.6929 inch)

80.000 mm(3.1496 inch)

109-7687(3) 580(1) 170.002 mm(6.6930 inch)

to170.028 mm(6.6940 inch)


162.80 mL(5.5 oz)

80.002 mm(3.1497inch)to

80.020 mm(3.1504inch)

180.000 mm(7.0866 inch)

100.000 mm(3.9370 inch)

6Y-3955 440(squarelaminated)

179.992 mm(7.0863 inch)

to180.017 mm(7.0873 inch)


230.88 mL(7.8 oz)

100.012 mm(3.9375inch)to

100.028 mm(3.9381inch)

190.000 mm(7.4803 inch)

90.000 mm(3.5433 inch)

6Y-6488 590(1)589 PM

190.002 mm(7.4804 inch)

to190.028 mm(7.4814 inch)


162.80 mL(5.5 oz)

90.012 mm(3.5438inch)to

90.028 mm(3.5444inch)(continued)


Bearing - Inspect

(Table 22, contd)



PartNumber

GeneratorFrameSize


BearingShield(Type)



225.000 mm(8.8582 inch)

105.000 mm(4.1338 inch)

6V-0410 680(1) 225.003 mm(8.8584 inch)

to225.034 mm(8.8596 inch)


230.88 mL(7.8 oz)

105.029 mm(4.1350inch)to

105.034 mm(4.1352inch)

225.000 mm(8.8582 inch)

105.000 mm(4.1338 inch)

108-1760 680(1) 225.003 mm(8.8584 inch)

to225.034 mm(8.8596 inch)


236.80 mL(8.0 oz)

105.029 mm(4.1350inch)to

105.034 mm(4.1352inch)

230.000 mm(9.0551 inch)

130.000 mm(5.1181 inch)

2L-4444(4) 8084 pole(1)

229.992 mm(9.0548 inch)

to230.022 mm(9.0560 inch)

Open 177.60 mL(6.0 oz)to

266.40 mL(9.0 oz)

130.028 mm(5.1192 inch)

to130.051 mm(5.1201inch)

230.000 mm(9.0551 inch)

130.000 mm(5.1181 inch)

2L-4444(4) 820(1) 229.992 mm(9.0548 inch)

to230.022 mm(9.0560 inch)

Open 236.8 mL(8.0 oz)to

355.20 mL(12.0 oz)

130.028 mm(5.1192 inch)

to130.051 mm(5.1201inch)

240.000 mm(9.4488 inch)

110.000 mm(4.3307 inch)

108-1761 690(1) 240.002 mm(9.4489 inch)

to240.033 mm(9.4501 inch)


296.00 mL(10.0 oz)(2)414.40 mL(14.0 oz)

to621.60 mL(21 oz)(3)

110.012 mm(4.3312inch)to

110.028 mm(4.3318inch)

240.000 mm(9.4488 inch)

110.000 mm(4.3307 inch)

6V-3310 800(1) 240.002 mm(9.4489 inch)

to240.033 mm(9.4501 inch)


239.76 mL(8.1 oz)

110.012 mm(4.3312inch)to

110.028 mm(4.3318inch)

240.000 mm(9.4488 inch)

110.000 mm(4.3307 inch)

6V-6752 800(1) 240.002 mm(9.4489 inch)

to240.033 mm(9.4501 inch)


239.76 mL(8.1 oz)

110.012 mm(4.3312inch)to

110.028 mm(4.3318inch)(continued)

82 SEBU6682-08Maintenance SectionBearing Temperature - Measure/Record

(Table 22, contd)



PartNumber

GeneratorFrameSize


BearingShield(Type)



240.000 mm(9.4488 inch)

110.000 mm(4.3307 inch)

108-1761 800(1) 240.002 mm(9.4489 inch)

to240.033 mm(9.4501 inch)


236.80 mL(8.0 oz)

110.012 mm(4.3312inch)to

110.028 mm(4.3318inch)

280.000 mm(11.024 inch)

130.000 mm(5.1181 inch)

154-3032 820 280.002 mm(11.0237 inch)

to280.032 mm(11.0249 inch)

Double N/A 130.028 mm(5.1192 inch)

to130.051 mm(5.1201inch)

(1) Inboard bearing(2) Outboard bearing(3) 109-7687 bearing is preferred.(4) This bearing is a spherical roller bearing. This bearing is greased from the brackets front side. All of the other bearings are ball bearings.(2) This bearing is on the same end as the exciter.(3) This bearing is on the drive end of the generator.

i01219565

Bearing Temperature -Measure/RecordSMCS Code: 4471-082-TA

Bearing temperature detectors are optional onall SR4B generators. These detectors are 100ohm resistance temperature detectors. Bearingtemperature detectors are used with equipmentthat has been provided by the customer in orderto measure the bearing temperature. Bearingtemperature detectors may help to prevent prematurebearing failure.

i02509091

Belts - Inspect/Adjust/ReplaceSMCS Code: 1357-025; 1357-040; 1357-510

InspectionInspect the alternator belt and the fan drive belts forwear and for cracking. Replace the belts if the beltsare not in good condition.

Check the belt tension according to the information inthe Service Manual, Specifications.

Slippage of loose belts can reduce the efficiencyof the driven components. Vibration of loose beltscan cause unnecessary wear on the followingcomponents:

Belts

Pulleys

Bearings

If the belts are too tight, unnecessary stress is placedon the components. This reduces the service life ofthe components.


Carburetor Air/Fuel Ratio - Check/Adjust

Adjusting the Alternator Belt

g01092641Illustration 62Typical alternator

(1) Mounting bolt(2) Adjusting nuts(3) Mounting bolt

1. Remove the drive belt guard.

2. Loosen mounting bolt (1), adjusting nuts (2) andmounting bolt (3).

3. Turn adjusting nuts (2) in order to increase ordecrease the drive belt tension.

4. Tighten adjusting nuts (2). Tighten mounting bolt(3). Tighten mounting bolt (1). For the propertorque, see the Service Manual, Specificationsmodule.

5. Reinstall the drive belt guard.

If new drive belts are installed, check the drive belttension again after 30 minutes of engine operation atthe rated rpm.

Adjusting the Fan Drive Belt1. Loosen the mounting bolt for the pulley.

2. Loosen the adjusting nut for the pulley.

3. Move the pulley in order to adjust the belt tension.

4. Tighten the adjusting nut.

5. Tighten the mounting bolt.

ReplacementFor applications that require multiple drive belts,replace the drive belts in matched sets. Replacingone drive belt of a matched set will cause the newdrive belt to carry more load because the older drivebelts are stretched. The additional load on the newdrive belt could cause the new drive belt to fail.

i01005891

Carburetor Air/Fuel Ratio -Check/AdjustSMCS Code: 1266-535; 1266

An engine failure may occur if the air/fuel ratio isnot appropriate for the fuel and for the operatingconditions. The service life of the turbocharger, of thevalves, and of the other components may be reduced.

Ensure that the carburetor is adjusted properly sothat the air/fuel ratio is correct.

For information on adjusting the carburetor, refer tothe Service Manual, Systems Operation/Testingand Adjusting, or refer to the Special Instruction,Installation and Initial Start-Up Procedure.

i01762721

Control Panel - InspectSMCS Code: 4490-040; 7451-040

Inspect the condition of the panel. If a component isdamaged, ensure that the component is repaired orthat the component is replaced. If equipped, ensurethat the electronic displays are operating properly.

Inspect the wiring for good condition. Ensure that thewiring connections are secure.

Record the Data and Review theDataIf equipped, check the gauges and check theindicators frequently during normal operation. Recordthe data in a log. Compare the new data to the datathat was previously recorded. Comparing the newdata to the recorded data will establish the normalgauge readings for the engine. A gauge reading thatis abnormal may indicate a problem with operationor with the gauge.

84 SEBU6682-08Maintenance SectionCooling System Coolant (NGEC) - Change

i02150881

Cooling System Coolant(NGEC) - ChangeSMCS Code: 1350-044

Clean the cooling system before the recommendedmaintenance interval if the following conditions exist:

The engine overheats frequently.

Foaming is observed.

Oil has entered the cooling system and the coolantis contaminated.

Drain the Cooling System1. Stop the engine and allow the engine to cool.Ensure that the engine will not start when thecooling system is drained.


2. Loosen the cooling system filler cap slowly inorder to relieve any pressure. Remove the coolingsystem filler cap.

g00719046Illustration 64Drain plugs on the oil cooler, water pumps, and elbows

3. Open the cooling system drain valve. Remove thedrain plugs.

NOTICEDispose of used engine coolant properly or recycle.Various methods have been proposed to reclaim usedcoolant for reuse in engine cooling systems. The fulldistillation procedure is the only method acceptable byCaterpillar to reclaim the used coolant.

For information regarding the disposal and therecycling of used coolant, consult your Caterpillardealer or consult Dealer Service Tools Group:

Outside Illinois: 1-800-542-TOOLInside Illinois: 1-800-541-TOOLCanada: 1-800-523-TOOL

Clean the Cooling System1. After the cooling system has been drained, flushthe cooling system with clean water in order toremove any debris.

2. Close the cooling system drain valve. Clean thedrain plugs and install the plugs.

NOTICEUse of commercially available cooling system clean-ers may cause damage to cooling system compo-nents. Use only cooling system cleaners that are ap-proved for Caterpillar engines.


Cooling System Coolant (NGEC) - Change

NOTICEFill the cooling system no faster than 19 L (5 US gal)per minute to avoid air locks.

3. Fill the cooling system with a mixture of cleanwater and Caterpillar Fast Acting Cooling SystemCleaner. Add 0.5 L (1 pint) of cleaner per 15 L(4 US gal) of the cooling system capacity. Installthe cooling system filler cap.

4. Start the engine. Operate the engine for aminimum of 30 minutes with a coolant temperatureof at least 82 C (180 F).

5. Stop the engine and allow the engine to cool.Loosen the cooling system filler cap slowly inorder to relieve any pressure. Remove the coolingsystem filler cap. Open the cooling system drainvalve. Remove the drain plugs.

NOTICEImproper or incomplete rinsing of the cooling systemcan result in damage to copper and other metal com-ponents.

To avoid damage to the cooling system, make sureto completely flush the cooling system with clear wa-ter. Continue to flush the system until all signs of thecleaning agent are gone.

6. Allow the water to drain. Flush the cooling systemwith clean water until the water that drains isclean. Close the cooling system drain valve. Cleanthe drain plugs and install the plugs.

Cleaning a Cooling System thathas Heavy Deposits or PluggingNote: For the following procedure to be effective,there must be an active flow through the coolingsystem components.

1. After the cooling system has been drained, flushthe cooling system with clean water in order toremove any debris.

2. Close the cooling system drain valve. Clean thedrain plugs and install the plugs.

NOTICEUse of commercially available cooling system clean-ers may cause damage to cooling system compo-nents. Use only cooling system cleaners that are ap-proved for Caterpillar engines.


3. Fill the cooling system with a mixture of cleanwater and Caterpillar Fast Acting Cooling SystemCleaner. Add 0.5 L (1 pint) of cleaner per3.8 to 7.6 L (1 to 2 US gal) of the cooling systemcapacity. Install the cooling system filler cap.

4. Start the engine. Operate the engine for aminimum of 90 minutes with a coolant temperatureof at least 82 C (180 F).

5. Stop the engine and allow the engine to cool.Loosen the cooling system filler cap slowly inorder to relieve any pressure. Remove the coolingsystem filler cap. Open the cooling system drainvalve. Remove the drain plugs. Allow the waterto drain.

NOTICEImproper or incomplete rinsing of the cooling systemcan result in damage to copper and other metal com-ponents.

To avoid damage to the cooling system, make sureto completely flush the cooling system with clear wa-ter. Continue to flush the system until all signs of thecleaning agent are gone.

6. Flush the cooling system with clean water untilthe water that drains is clean. Close the coolingsystem drain valve. Clean the drain plugs andinstall the plugs.

Fill the Cooling System


Note: For information about the proper coolant touse and for the capacity of the cooling system,seethis Operation and Maintenance Manual, RefillCapacities and Recommendations (MaintenanceSection).

1. Fill the cooling system with coolant/antifreeze. Donot install the cooling system filler cap.

2. Start the engine. Operate the engine in order topurge the air from the cavities of the engine block.Allow the coolant to warm and allow the coolantlevel to stabilize. Stop the engine.

86 SEBU6682-08Maintenance SectionCooling System Coolant Level - Check

3. Check the coolant level. Maintain the coolant tothe proper level on the sight gauge (if equipped).If a sight gauge is not equipped, maintain thecoolant within 13 mm (0.5 inch) below the bottomof the filler pipe.

4. Clean the cooling system filler cap. Inspect thegaskets of the cooling system filler cap. If thegaskets of the cooling system filler cap aredamaged, discard the old cooling system filler capand install a new cooling system filler cap. If thegaskets of the cooling system filler cap are notdamaged, use a 9S-8140 Pressurizing Pump inorder to pressure test the cooling system filler cap.The correct pressure is stamped on the face ofthe cooling system filler cap. If the cooling systemfiller cap does not maintain the correct pressure,install a new cooling system filler cap.

5. Start the engine. Inspect the cooling system forleaks and for proper operating temperature.

i01197583

Cooling System Coolant Level- CheckSMCS Code: 1350-535-FLV

Check the coolant level when the engine is stoppedand cool.

g00285520Illustration 65Cooling system filler cap

Pressurized System: Hot coolant can cause seri-ous burns. To open the cooling system filler cap,stop the engine and wait until the cooling systemcomponents are cool. Loosen the cooling systempressure cap slowly in order to relieve the pres-sure.

1. Remove the cooling system filler cap slowly inorder to relieve pressure.

2. Maintain the coolant level within 13 mm (0.5 inch)of the bottom of the filler pipe. If the engine isequipped with a sight glass, maintain the coolantlevel to the proper level in the sight glass.

g00103639Illustration 66Typical filler cap gaskets

3. Clean the cooling system filler cap and check thecondition of the filler cap gaskets. Replace thecooling system filler cap if the filler cap gaskets aredamaged. Reinstall the cooling system filler cap.

4. Inspect the cooling system for leaks.

i02064894

Cooling System CoolantSample (Level 1) - ObtainSMCS Code: 1350-008; 1395-008; 1395-554; 7542

NOTICEAlways use a designated pump for oil sampling, anduse a separate designated pump for coolant sampling.Using the same pump for both types of samples maycontaminate the samples that are being drawn. Thiscontaminate may cause a false analysis and an incor-rect interpretation that could lead to concerns by bothdealers and customers.

For conventional heavy-duty coolant/antifreeze,check the concentration of supplemental coolantadditive (SCA) regularly. The concentration of SCAcan be checked with an SOS coolant analysis(Level 1).

Obtain the sample of the coolant as close as possibleto the recommended sampling interval. In orderto receive the full effect of SOS analysis, youmust establish a consistent trend of data. In orderto establish a pertinent history of data, performconsistent samplings that are evenly spaced.Supplies for collecting samples can be obtained fromyour Caterpillar dealer.


Cooling System Coolant Sample (Level 2) - Obtain

Use the following guidelines for proper sampling ofthe coolant:

Never collect samples from expansion bottles.

Never collect samples from the drain for a system.

Keep the unused sampling bottles stored in plasticbags.

Keep the lids on empty sampling bottles until youare ready to collect the sample.

Complete the information on the label for thesampling bottle before you begin to take thesamples.

Obtain coolant samples directly from the coolantsample port. You should not obtain the samplesfrom any other location.

In order to avoid contamination, immediately placethe sample in the tube that is provided for mailing.

Submit the sample for Level 1 analysis.

Note: Level 1 results may indicate a need forLevel 2 Analysis.

For additional information about coolant analysis,see the Special Publication, SEBU6400, CaterpillarGas Engine Lubricant, Fuel and CoolantRecommendations or consult your Caterpillar dealer.

i02168823

Cooling System CoolantSample (Level 2) - ObtainSMCS Code: 1350-008; 1395-008; 1395-554; 7542

NOTICEAlways use a designated pump for oil sampling, anduse a separate designated pump for coolant sampling.Using the same pump for both types of samples maycontaminate the samples that are being drawn. Thiscontaminate may cause a false analysis and an incor-rect interpretation that could lead to concerns by bothdealers and customers.

Obtain the sample of the coolant as close as possibleto the recommended sampling interval. Suppliesfor collecting samples can be obtained from yourCaterpillar dealer.

Refer to this Operation and Maintenance Manual,Cooling System Coolant Sample (Level 1) - Obtain(Maintenance Section) for the guidelines for propersampling of the coolant.

Submit the sample for Level 2 analysis.

For additional information about coolant analysis,see the Special Publication, SEBU6400, CaterpillarGas Engine Lubricant, Fuel, and CoolantRecommendations or consult your Caterpillar dealer.

i02017557

Cooling System SupplementalCoolant Additive (SCA) -Test/AddSMCS Code: 1352-045; 1395-081

Cooling system coolant additive contains alkali.To help prevent personal injury, avoid contact withthe skin and eyes. Do not drink cooling systemcoolant additive.

Note: Caterpillar recommends an SOS coolantanalysis (Level 1).

Test the Concentration of the SCA

Coolant/Antifreeze and SCA

NOTICEDo not exceed the recommended six percent supple-mental coolant additive concentration.

Test the concentration of the SCA with the 8T-5296Coolant Conditioner Test Kit. Follow the instructionsthat are provided in the kit.

Water and SCA

NOTICEDo not exceed the recommended eight percent sup-plemental coolant additive concentration.

Test the concentration of the SCA with the 8T-5296Coolant Conditioner Test Kit. Use the instructionsthat follow:

1. Fill the syringe to the 1.0 ml mark with thecoolant.

2. Dispense the 1.0 mL coolant sample from thesyringe into the empty mixing bottle.

3. Add tap water to the mixing bottle in order to bringthe level up to the 10 ml mark. Place the cap onthe bottle and shake the bottle.

88 SEBU6682-08Maintenance SectionCrankcase Blowby - Measure/Record

4. Add 2 to 3 drops of the NITRITE INDICATORSOLUTION B to the mixing bottle. Move the bottlein a circular motion in order to mix the solution.

5. Add 1 drop of NITRITE TEST SOLUTION A tothe mixing bottle. Move the bottle in a circularmotion in order to mix the solution.

6. Repeat 5 until the solution changes color from redto light gray, green, or blue. Record the number ofdrops of NITRITE TEST SOLUTION A that wererequired to cause the color change.

7. Use Table 23 to interpret the results.

Table 23

Number ofDrops

Concentrationof SCA

MaintenanceRequired

Less than 25 Less than therecommendedconcentration ofSCA

Add SCA.Retest thecoolant.

25 to 30 Therecommendedconcentration ofSCA

None

More than 30 More than therecommendedconcentration ofSCA

Remove thecoolant.Replace withwater onlyRetest thecoolant.

Add the SCA, If Necessary

Pressurized System: Hot coolant can cause seri-ous burns. To open the cooling system filler cap,stop the engine and wait until the cooling systemcomponents are cool. Loosen the cooling systempressure cap slowly in order to relieve the pres-sure.

1. Remove the cooling system filler cap slowly.

Note: Always dispose of fluids according to localregulations.

2. If necessary, drain some coolant in order to allowspace for the addition of the SCA.

NOTICEExcessive supplemental coolant additive concentra-tion can form deposits on the higher temperature sur-faces of the cooling system, reducing the enginesheat transfer characteristics. Reduced heat transfercould cause cracking of the cylinder head and otherhigh temperature components.

Excessive supplemental coolant additive concentra-tion could also result in blockage of the heat exchang-er, overheating, and/or accelerated wear of the waterpump seal.

Do not exceed the recommended amount of supple-mental coolant additive concentration.

3. Add the proper amount of SCA. The concentrationof the SCA depends on the type of coolant thatis used. To determine the proper amount, seethis Operation and Maintenance Manual, RefillCapacities and Recommendations topic.

4. Clean the cooling system filler cap. Install thecooling system filler cap.

i01333307

Crankcase Blowby -Measure/RecordSMCS Code: 1317

Note: For a new G3400 Engine, the typical range forcrankcase blowby is approximately 22 to 37 L/Bkw-hr(0.6 to 1.0 cu ft/Bhp-hr).

Measure the crankcase blowby of new engines.Record the data. Continue to periodically measurethe blowby. Comparing the recorded data to the newdata provides information about the condition of theengine.

Note: Crankcase blowby is one of the three factorsthat help to determine the major overhaul interval.For more information, see this Operation andMaintenance manual, Overhaul (Major) topic(Maintenance Section).

After a new engine is used for a short time, theblowby can decrease as the piston rings are seated.The blowby will gradually increase as the followingcomponents show wear:

piston rings

cylinder liners


Crankshaft Vibration Damper - Inspect

Note: A problem with the piston rings causes theoil to deteriorate rapidly. Information regarding thecondition of the piston rings can be obtained fromthe measurement of the blowby and the results ofoil analysis.

The blowby of a worn engine may exceed the blowbyof a new engine by two times or more.

A sudden increase in blowby could indicate a brokenpiston ring. The following conditions are otherpotential sources of blowby:

Worn valve guides

A turbocharger seal that leaks

A rebuilt engine can have a high blowby due to thefollowing factors:

The piston rings are not seated properly.

Worn parts such as valve guides were not replaced.

Excessive blowby may indicate the need for anoverhaul. By keeping a record of the results, agradual increase in the amount of the blowby will benoted until the amount has become excessive.

To measure the blowby, use the 8T-2700 Blowby/AirFlow Indicator. Refer to Special Instruction,SEHS8712, Using the 8T-2700 Blowby/AirflowIndicator Group. The instruction is provided with thetool.

Keep a record of the results.

For more information, see the Service Manual,Systems Operation/Testing and Adjusting. Forassistance, consult your Caterpillar dealer.

i01333457

Crankshaft Vibration Damper- InspectSMCS Code: 1205-040

Damage to the crankshaft vibration damper or failureof the crankshaft vibration damper can increasetorsional vibrations. This can result in damage tothe crankshaft and to other engine components. Adeteriorating damper can cause excessive gear trainnoise at variable points in the speed range.

The damper is mounted to the crankshaft which islocated behind the belt guard on the front of theengine.

Visconic DamperThe visconic damper has a weight that is locatedinside a fluid filled case. The weight moves in thecase in order to limit torsional vibration.

Inspect the damper for evidence of fluid leaks. Ifa fluid leak is found, determine the type of fluid.The fluid in the damper is silicone. Silicone hasthe following characteristics: transparent, viscous,smooth, and adhesive.

If the fluid leak is oil, inspect the crankshaft seals forleaks. If a leak is observed, replace the crankshaftseals.

Inspect the damper and repair or replace the damperfor any of the following reasons:

The damper is dented, cracked, or leaking.

The paint on the damper is discolored from heat.

The engine has had a failure because of a brokencrankshaft.

Analysis of the oil has revealed that the front mainbearing is badly worn.

There is a large amount of gear train wear that isnot caused by a lack of oil.

Refer to the Service Manual or consult yourCaterpillar dealer for information about damperreplacement.

i01664707

Cylinder Pressure -Measure/RecordSMCS Code: 1223-082-CC; 1223; 7450-082

Measure the cylinder pressure of new engines.Record the data. Continue to periodically measurethe cylinder pressure. Comparing the recorded datato the new data provides information about thecondition of the engine.

Cylinder pressure can be measured during inspectionof the spark plugs. Use the following guidelines forchecking the cylinder pressure:

Remove all of the spark plugs.

Fully open the throttle plate.

Minimize the cranking time to 3 or 4 revolutions.This will enable a maximum consistent crankingspeed for the check. Also, the battery power willbe conserved.

90 SEBU6682-08Maintenance SectionDriven Equipment - Check

A loss of cylinder pressure or a change of pressurein one or more cylinders may indicate the followingconditions. These conditions may indicate a problemwith lubrication:

Excessive deposits

Guttering of valves

A broken valve

A piston ring that sticks

A broken piston ring

Worn piston rings

Worn cylinder liners

If the cylinder pressure has risen by one or morecompression ratios, the engine needs a top endoverhaul in order to remove deposits. Failure toremove the deposits will increase the chance fordetonation. Severe guttering of the valves will occur.

To measure the cylinder pressure, use the 193-5859Cylinder Pressure Gauge Gp. Follow the procedurein the Special Instruction, NEHS0798 that is includedwith the gauge group. Record the pressure foreach cylinder. Use the Operation and MaintenanceManual, Valve Data Sheet (Reference MaterialsSection).

Illustration 67 is a graph of typical cylinder pressuresfor engines with different compression ratios.


(Y) Cylinder pressure in kPa(X) Compression ratio(1) Normal range for cylinder pressure

i00449093

Driven Equipment - CheckSMCS Code: 3279-535

To minimize bearing problems and vibration of theengine crankshaft and the driven equipment, thealignment between the engine and driven equipmentmust be maintained properly.

Check the alignment according to the instructionsthat are provided by the following manufacturers:

Caterpillar

OEM of the coupling

OEM of the driven equipment


Driven Equipment - Inspect/Replace/Lubricate

i00935098

Driven Equipment -Inspect/Replace/LubricateSMCS Code: 3279-040

Observe the driven equipment during operation. Lookfor the following items:

Unusual noise and vibration

Loose connections

Damaged parts

Perform any maintenance that is recommendedby the OEM of the driven equipment. Refer to theliterature of the OEM of the driven equipment for thefollowing service instructions.

Inspection

Lubricating grease and lubricating oil requirements

Specifications for adjustment

Replacement of components

Requirements for ventilation

i01664717

Engine - CleanSMCS Code: 1000-070

Personal injury or death can result from high volt-age.

Moisture could create paths of electrical conduc-tivity.

Make sure the unit is off line (disconnected fromutility and/or other generators), locked out andtagged "Do Not Operate".

NOTICEWater or condensation can cause damage to gen-erator components. Protect all electrical componentsfrom exposure to water.

NOTICEAccumulated grease and oil on an engine is a fire haz-ard. Keep the engine clean. Remove debris and fluidspills whenever a significant quantity accumulates onthe engine.

Steam cleaning the engine will remove accumulatedoil and grease. A clean engine provides the followingbenefits:

Easy detection of fluid leaks

Maximum heat transfer characteristics

Ease of maintenance

Note: For more information on cleaning and dryingelectric generators, refer to Special Instruction,SEHS9124, Cleaning and Drying of Electric SetGenerators.

i01749609

Engine Air Cleaner Element -ReplaceSMCS Code: 1051-510; 1054-510

NOTICENever run the engine without an air cleaner elementinstalled. Never run the engine with a damaged aircleaner element. Do not use air cleaner elements withdamaged pleats, gaskets or seals. Dirt entering theengine causes premature wear and damage to enginecomponents. Air cleaner elements help to prevent air-borne debris from entering the air inlet.

NOTICENever service the air cleaner element with the enginerunning since this will allow dirt to enter the engine.

Servicing the Air Cleaner ElementsIf the air cleaner element becomes plugged, the airpressure can split the filter material of the element.Unfiltered air will drastically accelerate internalengine wear. Your Caterpillar dealer has the properair cleaner elements for your application.

The air cleaner may be mounted high above theengine. If necessary, use a ladder or a platform toreach the air cleaner.

Check the precleaner (if equipped) daily foraccumulation of dirt and debris. Remove any dirtand debris, as needed.

92 SEBU6682-08Maintenance SectionEngine Air Cleaner Element - Replace

Operating conditions (dust, dirt and debris) mayrequire more frequent service of the air cleanerelement.

The air cleaner element may be cleaned up tosix times if the element is properly cleaned andinspected.

The air cleaner element should be replaced at leastone time per year. This replacement should beperformed regardless of the number of cleanings.

Replace the dirty paper elements with cleanelements. Before installation, thoroughly inspect theelement for tears and/or holes in the filter material.Inspect the gasket or the seal of the element fordamage. Maintain a supply of suitable elements forreplacement purposes.


Fasteners for the air cleaner cover


(1) Cover(2) Element(3) Air inlet

1. Release the fasteners for cover (1).

2. Remove the cover and element (2).

3. Cover air inlet (3) with tape in order to keep dirtout.

4. Clean the inside of the cover and the body witha clean, dry cloth.

5. Remove the tape for the air inlet. Install a newelement or a clean element.

6. Install the cover.

7. If necessary, reset the air cleaner service indicator.

Cleaning the Primary Air CleanerElementsThe primary air cleaner element can be used upto six times if the element is properly cleaned andinspected. When the element is cleaned, check thefilter material for rips or tears. Replace the elementat least one time per year regardless of the numberof cleanings.

Use clean elements while dirty elements are beingcleaned.

NOTICEDo not clean the air cleaner elements by bumping ortapping. This could damage the seals. Do not use el-ements with damaged pleats, gaskets or seals. Dam-aged elements will allow dirt to pass through. Enginedamage could result.

Visually inspect the elements before cleaning. Inspectthe elements for damage to the seal, the gaskets,and the outer cover. Discard any damaged elements.

Air cleaner elements can be cleaned with pressurizedair and with a vacuum.

Pressurized Air

Pressurized air can be used to clean elementsthat have not been cleaned more than two times.Pressurized air will not remove deposits of carbonand oil. Use filtered, dry air with a maximum pressureof 207 kPa (30 psi).



Engine Air Cleaner Service Indicator - Inspect

Note:When the elements are cleaned, always beginwith the clean side (inside) in order to force dirtparticles toward the dirty side (outside).

Aim the hose so that the air flows inside the elementalong the length of the filter in order to help preventdamage to the paper pleats. Do not aim the streamof air directly at the primary air cleaner element. Dirtcould be forced into the pleats.

Note: Refer to Inspecting the Primary Air CleanerElements.

Vacuum Cleaning

Vacuum cleaning is a good method for cleaningelements which require daily cleaning because of adry, dusty environment. Cleaning with pressurized airis recommended prior to vacuum cleaning. Vacuumcleaning will not remove deposits of carbon and oil.

Note: Refer to Inspecting the Primary Air CleanerElements.

Inspecting the Primary Air CleanerElements


Inspect the clean, dry element. Use a 60 watt bluelight in a dark room or in a similar facility. Placethe blue light in the element. Rotate the element.Inspect the element for tears and/or holes. Inspectthe element for light that may show through the filtermaterial. If it is necessary in order to confirm theresult, compare the element to a new element thathas the same part number.

Do not use an element that has any tears and/orholes in the filter material. Do not use an element withdamaged pleats, gaskets or seals. Discard damagedelements.

Storing Primary Air Cleaner Elements

If an element that passes inspection will not be usedimmediately, store the element for future use.


Do not use paint, a waterproof cover, or plastic as aprotective covering for storage. Restricted air flowmay result. To protect against dirt and damage, wrapthe elements in Volatile Corrosion Inhibited (VCI)paper.

Place the element into a cardboard box for storage.For identification, mark the outside of the containerand mark the element. Include the followinginformation:

Date of cleaning

Number of cleanings

Store the container in a dry location.

For more detailed information on cleaning the primaryair cleaner element, refer to Special Publication,SEBF8062, Procedure to Inspect and Clean AirFilters.

i01505252

Engine Air Cleaner ServiceIndicator - InspectSMCS Code: 7452-040

A service indicator may be mounted on the aircleaner element or in a remote location.

94 SEBU6682-08Maintenance SectionEngine Air Precleaner - Clean

g00517797Illustration 73Service indicator

Some engines may be equipped with a differentservice indicator.

Observe the service indicator. Clean the air cleanerelement or replace the element when the followingconditions occur:

The yellow diaphragm enters the red zone.

The red piston locks in the visible position.

The air restriction reaches 3.7 kPa(15 inches of H2O).

Inspect the service indicator daily for cracks, holes, orloose fittings. If any of these conditions are present,repair the service indicator or replace the serviceindicator.

Test the Service IndicatorService indicators are important instruments.

Check for ease of resetting. The service indicatorshould reset in less than three pushes.

Check the movement of the yellow core when theengine is accelerated to the engine rated rpm.The yellow core should latch approximately at thegreatest vacuum that is attained.

If the service indicator does not reset easily, or if theyellow core does not latch at the greatest vacuum,replace the service indicator. If the new serviceindicator will not reset, the fitting for the serviceindicator may be plugged.

g00351792Illustration 74Porous filter

A porous filter is part of a fitting that is used formounting of the service indicator. Inspect the filterfor cleanliness. Clean the filter, if necessary. Usecompressed air or a clean, nonflammable solvent.

The service indicator may need to be replacedfrequently in environments that are severely dusty.Replace the service indicator annually regardlessof the operating conditions. Replace the serviceindicator when the engine is overhauled, andwhenever major engine components are replaced.

Note: When a new service indicator is installed,excessive force may crack the top of the serviceindicator. Tighten the service indicator to a torqueof 2 Nm (18 lb in).

i01397717

Engine Air Precleaner - CleanSMCS Code: 1055-070

g00736588Illustration 75Typical precleaner(1) Wing nut(2) Cover(3) Body


Engine Crankcase Breather - Clean

Remove wing nut (1) and cover (2). Check for anaccumulation of dirt and debris in body (3). Clean thebody, if necessary.

After cleaning the precleaner, install cover (2) andwing nut (1).

Note: When the engine is operated in dustyapplications, more frequent cleaning is required.

i02263740

Engine Crankcase Breather -CleanSMCS Code: 1317-070

NOTICEPerform this maintenance with the engine stopped.

If the crankcase breather is not maintained on aregular basis, the crankcase breather will becomeplugged. A plugged crankcase breather will causeexcessive crankcase pressure that may causecrankshaft seal leakage.


Typical example

(1) Hose clamp(2) Breather assembly(3) Retaining clamp(4) Seal

1. Loosen hose clamp (1) and remove the hose frombreather assembly (2).

2. Loosen retaining clamp (3). Remove the breatherassembly and seal (4).

3. Wash the breather element in solvent that is cleanand nonflammable. Allow the breather element todry before installation.

4. Install a breather element that is clean and dry.Install the seal, the breather assembly, and theclamp. Refer to the Specifications, SENR3130 inorder to locate the proper torques.

5. Install the hose. Install the hose clamp. Refer tothe Specifications, SENR3130 in order to locatethe proper torques.

i02017664

Engine Mounts - CheckSMCS Code: 1152-535


(1) Mounting bolts for the engine(2) Mounting bolts for the generator(3) Levelling bolts for the isolators

Misalignment of the engine and the driven equipmentwill cause extensive damage. Excessive vibrationcan lead to misalignment. Excessive vibration of theengine and the driven equipment can be caused bythe following conditions:

Improper mounting

Loose bolts

Deterioration of the isolators

Ensure that the mounting bolts are tightenedto the proper torque. For standard torques, seeSpecifications, SENR3130, Torque Specifications.

Ensure that the isolators are free of oil andcontamination. Inspect the isolators for deterioration.Ensure that the bolts for the isolators are tightened tothe proper torque.

Replace any isolator that shows deterioration. Formore information, see the literature that is providedby the OEM of the isolators. Also see the Applicationand Installation Guide for the engine. Consult yourCaterpillar dealer for assistance.

96 SEBU6682-08Maintenance SectionEngine Oil Filter (Auxiliary) - Change

i02017678

Engine Oil Filter (Auxiliary) -ChangeSMCS Code: 1318

Note: An auxiliary oil filter system enables the oilcapacity of the engine to be increased. Use of theauxiliary oil filter elements is not recommended.

Perform this procedure after the oil has been drainedfrom the auxiliary oil filter housing.

g00787079Illustration 78Auxiliary oil filter housing

(1) Vent plug(2) Drain plug

1. If the engine is equipped with an auxiliary oil filtersystem, remove vent plug (1). Remove drain plug(2). Allow the oil to drain. After the oil has drained,clean the drain plug.


(1) Vent plug(2) Drain plug(3) Nut(4) Washer(5) Plug(6) Bolt(7) Cover(8) Cover gasket(9) Nut(10) Spring retainer(11) Spring(12) Bolt(13) Washer(14) Spider(15) Plate

1. Remove 12 nuts (3), washers (4), and bolts (6).

2. Remove cover (7) and gasket (8). Do not damagethe gasket.

Possible injury can occur during the removal ofthe nut, the spring retainer, and the spring. Springforce will be released when the nut and the springretainer are removed. Be prepared to hold thespring retainer as the nut is loosened.

3. Remove nut (9), spring retainer (10), and spring(11). Hold spring retainer (10) as nut (9) isloosened.


Engine Oil Level - Check

4. Remove bolt (12). Remove washer (13) andspider (14). Remove plate (15).

5. Remove the oil filter elements if the oil filters havebeen installed. Clean the inside of the oil filterhousing.

Inspect the oil filter elements if the oil filters havebeen installed. For instructions on inspectingthe oil filter elements, refer to the Operation andMaintenance Manual, Engine Oil Filter - Changetopic (Maintenance Section).

6. Ensure that plug (5) is tight.

7. Install drain plug (2). Tighten the drain plug to70 14 Nm (50 10 lb ft).

Note: Use of the auxiliary oil filter elements is notrequired.

8. If the use of auxiliary oil filter elements is desired,install new elements.

9. Install plate (15), spider (14), washer (13), andbolt (12).

10. Install spring (11) on spider (14). Install springretainer (10) and nut (9) on bolt (12).

11.Tighten nut (9) in order to compress spring (11)until the spring retainer bottoms out on bolt (12).Do not overtighten the nut.

12. Fill the oil filter housing with oil. For the correctamount of oil, refer to the Operation andMaintenance Manual, Refill Capacities andRecommendations topic (Maintenance Section).

13. Inspect cover gasket (8) for tears, breaks, or otherdamage. If the cover gasket is damaged, replacethe old cover gasket with a new cover gasket.Install cover gasket (8). Install cover (7).

14. Install twelve bolts (6), washers (4), and nuts(3). Tighten nuts sequentially around the coveruntil the nuts are snug. Tighten the nuts to100 15 Nm (75 11 lb ft).

15. Install vent plug (1).

i02150939

Engine Oil Level - CheckSMCS Code: 1348-535-FLV

The most accurate check of the oil level isperformed when the engine is stopped. Perform thismaintenance on a surface that is as level as possible.

g00788953Illustration 80(1) Oil level gauge (dipstick)(2) Oil filler

g00735162Illustration 81(3) ENGINE STOPPED side(4) LOW IDLE side(5) ADD mark(6) FULL mark

1. Ensure that oil level gauge (1) is seated.

a. If the engine is stopped, remove oil levelgauge (1). Observe the oil level on ENGINESTOPPED side (3).

b. If the engine is operating, reduce the enginespeed to low idle. Remove oil level gauge (1)and observe the oil level on LOW IDLE side(4).

The oil level should be between ADD mark(5) and FULL mark (6).

98 SEBU6682-08Maintenance SectionEngine Oil Sample - Obtain

NOTICEEngine damage can occur if the crankcase is filledabove the FULL mark on the oil level gauge (dip-stick).

An overfull crankcase can cause the crankshaft to dipinto the oil. This will reduce the power that is devel-oped and also force air bubbles into the oil. Thesebubbles (foam) can cause the following problems: re-duction of the oils ability to lubricate, reduction of oilpressure, inadequate cooling, oil blowing out of thecrankcase breathers, and excessive oil consumption.

Excessive oil consumption will cause deposits to formon the pistons and in the combustion chamber. De-posits in the combustion chamber lead to the followingproblems: guttering of the valves, packing of carbonunder the piston rings, and wear of the cylinder liner.

If the oil level is above the FULL mark on the oil levelgauge, drain some of the oil immediately.

2. If necessary, remove oil filler cap (2) and addoil. For the correct oil to use, see this Operationand Maintenance Manual, Refill Capacities andRecommendations topic (Maintenance Section).Do not fill the crankcase above FULL mark (6).Clean the oil filler cap. Install the oil filler cap.

3. Record the amount of oil that is added. For thenext oil sample and analysis, include the totalamount of oil that has been added since theprevious oil sample. This will help to provide themost accurate oil analysis.

i01363663

Engine Oil Sample - ObtainSMCS Code: 1348-554-SM

In addition to a good preventive maintenanceprogram, Caterpillar recommends using SOS oilanalysis at regularly scheduled intervals in orderto monitor the condition of the engine and themaintenance requirements of the engine.

Obtain the Sample and the Analysis

Hot oil and hot components can cause personalinjury. Do not allow hot oil or hot components tocontact the skin.

Before taking the sample, complete the Label,PEEP5031 for identification of the sample. To helpobtain the most accurate analysis, provide thefollowing information:

Engine model

Service hours on the engine

The oils hours of use

The amount of oil that has been added since thelast oil change

To ensure that the sample is representative of theoil in the crankcase, obtain a warm, well mixed oilsample.

To avoid contamination of the oil samples, the toolsand the supplies that are used for obtaining oilsamples must be clean.

Caterpillar recommends using the sampling valvein order to obtain oil samples. The quality andthe consistency of the samples is better when thesampling valve is used. The location of the samplingvalve allows oil that is flowing under pressure to beobtained during normal engine operation.

The 8T-9190 Fluid Sampling Bottle Group isrecommended for use with the sampling valve. Thebottle group includes the parts that are needed forobtaining oil samples. Instructions are also provided.

NOTICEDo not use the same vacuum sampling pump for ex-tracting oil samples that is used for extracting coolantsamples.

A small residue of either type sample may remain inthe pump and may cause a false positive analysis forthe sample being taken.

Always use a designated pump for oil sampling and adesignated pump for coolant sampling.

Failure to do so may cause a false analysis whichcould lead to customer and dealer concerns.

If the engine is not equipped with a sampling valve,use the 1U-5718 Vacuum Pump. The pump isdesigned to accept sampling bottles. Disposabletubing must be attached to the pump for insertioninto the sump.

For instructions, see Special Publication, PEHP6001,How To Take A Good Oil Sample. Consult yourCaterpillar dealer for complete information andassistance in establishing an SOS program for yourengine.


Engine Oil and Filter - Change

i02523743

Engine Oil and Filter - ChangeSMCS Code: 1318-510

Hot oil and hot components can cause personalinjury. Do not allow hot oil or hot components tocontact the skin.

NOTICEEnsure that the engine is stopped before performingthis procedure. Attach a DONOTOPERATE tag to thestarting controls.

Do not drain the oil when the engine is cold. As the oilcools, suspended waste particles settle on the bottomof the oil pan. The waste particles are not removedwhen the cold oil is drained. Drain the crankcase withthe oil warm, immediately after the engine is stopped.This method of draining allows the waste particlesthat are suspended in the oil to be drained.

Failure to follow this recommended procedure willcause the waste particles to be recirculated throughthe engine lubrication system with the new oil.


(1) Oil filler cap(2) Oil filter(3) Oil level gauge (dipstick)(4) Oil drain

Drain the Engine Oil1. After the engine has been operated at normaloperating temperature, STOP the engine.

NOTICECare must be taken to ensure that fluids are containedduring performance of inspection, maintenance, test-ing, adjusting and repair of the product. Be prepared tocollect the fluid with suitable containers before open-ing any compartment or disassembling any compo-nent containing fluids.

Refer to Special Publication, NENG2500, CaterpillarDealer Service Tool Catalog for tools and suppliessuitable to collect and contain fluids on Caterpillarproducts.

Dispose of all fluids according to local regulations andmandates.

2. Drain the oil.

a. If the engine has an oil drain valve, open thevalve in order to drain the oil. After the oil hasdrained, close the valve.

b. If the engine does not have a drain valve,remove an oil drain plug. Allow the oil to drain.

Replace the Oil Filter1. Remove the oil filter with a 1U-8760 ChainWrench.

2. Cut the oil filter open with a 4C-5084 Oil FilterCutter. Break apart the pleats and inspect the oilfilter for metal debris.

An excessive amount of metal debris in the oilfilter may indicate early wear or a pending failure.

Use a magnet to differentiate between the ferrousmetals and the nonferrous metals that are found inthe oil filter element. Ferrous metals may indicatewear on the steel and cast iron parts of the engine.

Nonferrous metals may indicate wear on thealuminum parts, brass parts or bronze parts ofthe engine. Parts that may be affected includethe following items: main bearings, rod bearings,turbocharger bearings, and cylinder heads.

Aluminum debris may indicate problems with thebearings of the front gears. If you find aluminumdebris, inspect the vibration damper and the idlergear bearings.

Due to normal wear and friction, it is notuncommon to find small amounts of debris in theoil filter element. If an excessive amount of debrisis found in the oil filter element, consult yourCaterpillar dealer in order to arrange for furtheroil analysis.

100 SEBU6682-08Maintenance SectionEngine Oil and Filter - Change

g00103713Illustration 83Typical filter mounting base and filter gasket

3. Clean the sealing surface of the filter mountingbase. Ensure that all of the old oil filter gasket isremoved.

NOTICECaterpillar oil filters are built to Caterpillar speci-fications. Use of an oil filter not recommended byCaterpillar could result in severe engine damage tothe engine bearings, crankshaft, etc., as a result ofthe larger waste particles from unfiltered oil enteringthe engine lubricating system. Only use oil filtersrecommended by Caterpillar.

4. Apply clean engine oil to the new oil filter gasket.

NOTICEDo not fill the oil filters with oil before installing them.This oil would not be filtered and could be contaminat-ed. Contaminated oil can cause accelerated wear toengine components.

5. Install the oil filter. Tighten the oil filter until theoil filter gasket contacts the base. Tighten the oilfilter by hand according to the instructions that areshown on the oil filter. Do not overtighten the oilfilter.

Fill the Engine Crankcase

NOTICEOnly use oils that are recommended

cat 3408 serie gbn1.. sebu6682-08 m

Documents

engine oil level check

engine clean

frequent maintenance

maintenance procedures

engine valve rotators

engine air cleaner element

engine air precleaner

service hoursengine