d8l

DescriptionElevated sprocket tractors used for dozing, pushing,ripping or with winch. Also used with special guardsand equipment for work in waste disposal. Tractor isstandard with power shift transmission and steeringclutches.

Serial Number Range53Y, 7YB, 7JC4FB: Direct Drive, Special Application

Lubrication RecommendationsFor complete information concerning lubricationrecommendations, refer to Caterpillar MachineLubricant Recommendations. Form SEBU6250.

Oil Sampling ProceduresThese machines were not initially equipped with oilsampling valves. If sampling valves are desired,please refer to Special Instruction SEHS9043.

Filter InspectionRecommend that filters be saved for inspection.Plastic bags are convenient for retaining the filtersuntil they can be cut open for inspection. The4C5084 Filter Cutting Tool is available for thispurpose. Be alert for visible pieces of syntheticfriction material or metal which may indicate aproblem.

CONFIDENTIALThis document contains unpublished confidentialproprietary, and trade secret information of Caterpillar Inc.,and is intended for distribution only to parties specificallyauthorized by Caterpillar. Unauthorized copying, distri-bution, or use is specifically prohibited.

© 1997 CATERPILLAR INC. ALL RIGHTS RESERVED

NOTICESpecific information supplied by this documentconcerning the machine/compartment and wear limitscontained in this document are intended to be usedonly as general guidelines for interpretation.

Model-specific information supplied by this documentis subject to change and may vary on a machine-by-machine basis. Most often, changes to majorcomponents changes are delineated by specific serialnumber breaks and/or prefix changes. Equipmentchanges and updates are frequent; therefore, youmay need to consult current Operations &Maintenance Manuals, Parts Manuals, ServiceManuals or other reference materials for details for aspecific serial number machine.

Wear tables, provided elsewhere by Caterpillar, weredeveloped for average conditions and are intended toreflect expected values at normal oil change periods.They may be too high or too low for some specificmachine applications. Interpretations should bebased on the trend of wear values in eachcompartment whenever possible.

Blank wear tables are provided for entry of eitherCaterpillar or dealer established guidelines. Note thatSodium and Molybdenum are not included in theseblank wear tables because these elements are oftenpresent in oil additives and, therefore, must betrended for meaningful analysis.

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Printed in U.S.A. (12/95)

®

Bulletin No. 6.1File Under Track-Type Tractors

D8L Track-Type Tractors

FLUID ANALYSIS GUIDE

Machine Profiles

ENGINE

Serial No. Range: D8L

Engine Model: 3408 T

Horsepower Rating: 250 kW, 335 FWHP

Oil Change Interval: 250 Hrs.

Filter Change Interval: 250 Hrs.

Sump Capacity: 45.5 Liters (12 Gal.)

Engine Oil Cooler: Water

Cooling System: 100 Liters (26.5 Gal.)

Oil Transfer Possibilities:

Oil may transfer between the engine andtransmission through the rear crankshaft seal.

Notes:1. Recommend Caterpillar Diesel Engine Oil (DEO).

WEAR ELEMENT SOURCES

CopperFront and rear idler gear thrust bearingJacket water pump thrust bearingTurbocharger sleeve bearingOil cooler core tubes (no failure)Wrist pin bushingOil pump drive thrust washerGovernor bushingsService meter drive gearCooling systems leaksCam follower roller shaftTurbocharger thrust bearingOil additives (no failure)

IronCrankshaftCamshaftValvesValve seats, guides, liners and cylinder wallsOil pumpCam follower

ChromiumPiston rings

LeadMain and rod bearingsCamshaft bearings

TinWater pump bearingsTiming gear bearingsMain and Rod bearings

AluminumMain bearingsRod bearingsTiming gear bushingsTiming gear coverCrankshaft thrust bearingRocker armsFuel pump liftersPistonsTiming gear bearingsOil pump bushingsTurbocharger thrust bearingDirt entry (clay soils)Anti-seize compounds (no failure)

SiliconDirt entrySilicon grease (no failure)Silicon additives (no failure)

SodiumOil additives (no failure)Coolant entryWater leaksCondensation

MolybdenumPlasma coated ringsOil additives (no failure)

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POWER TRAIN OIL SYSTEM(Power Shift)

Serial No. Range: D8L (except 4FB Direct Drive)

Type: Planetary power shift

Speeds: 3F 3R



Power Train Oil System: 167 Liters (44 Gal.)

Transmission Pump Type: Gear

Oil Cooler Type: Water

Disc Material:Transmission Discs: F37 and RayflexSteering Clutches: GraphiticBrake Discs: Sintered Bronze

Brakes: Wet Multiple Disc

Common Sump: Transmission, torque divider,bevel gear, steering clutches and brakes share acommon sump.


1. Oil may transfer between the engine andtransmission compartments through the rearcrankshaft seal.

2. Hydraulic oil may transfer to the transmissionthrough a damaged pump shaft seal.

3. Oil may transfer between the transmission andthe final drive compartments through the axleshift seals.

Notes:1. Recommend Caterpillar Transmission / Drive

Train Oil (TDTO).


CopperCooler core leaching (no failure)Oil additives (no failure)Pressure plate wear (gear pump)Brake discsAnti-seize compounds (no failure)

IronGearsBearingsClutch platesSplinesShaftsPump wearHousing

ChromiumBearings

TinRoller bearings

AluminumTorque converter turbineTransmission pump bushingsDirt entry (clay soils)Pump body wear (gear pump)Isolation plate (gear pump)Anti-seize compounds (no failure)


SodiumCoolant leakCondensationWater entryOil additives (no failure)

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POWER TRAIN OIL SYSTEM(Direct Drive)

Serial No. Range: D8L: 4FB

Type: Direct Drive - Countershaft

Speeds: 6F 6R



Power Train System Capacity:154 Liters (37.4 Gal.)

Transmission Pump Type: Gear

Oil Cooler Type: Water

Disc Material: Cellulose

Brakes: Wet Multiple Disc of Cellulose Fiber

Common Sump: Transmission, flywheel clutch,steering clutches, brakes, and bevel gear share acommon sump.


1. Engine to clutch through the rear crankshaft seal

2. Hydraulic to the engine through a damaged pumpseal

3. Transmission to final drive through a lip-type sealat the axle shaft


Train Oil (TDTO).


CopperCooler core leaching (no failure)Oil additives (no failure)Anti-seize compounds (no failure)

IronShifter ForksGearsBearingsClutch platesSplinesShaftsPump wearHousingBrake plates

ChromiumBearings

TinRoller bearings

AluminumDirt entry (clay soils)Isolation plate (gear pump)Anti-seize compounds (no failure)


SodiumCondensationWater entryOil additives (no failure)

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HYDRAULICS




Hydraulic Tank: 72 Liters (19 Gal.)

Oil Cooler Type: None (Water Cooler is an option)

Pump Type(s):

2 Section Vickers Vane controls flow to:Implements

Common Sump: Separate

Oil Transfer Possibilities: None

1. Recommend Caterpillar Hydraulic Oil (HYDO).


CopperOil additives (no failure)Bronze flex plates (vane pump)Anti-seize compounds (no failure)

IronPump housingCylinder wearPump wearHousing

ChromiumCylinder rods

TinRoller bearings

AluminumDirt entry (clay soils)Anti-seize compounds (no failure)


SodiumCondensationWater entryOil additives (no failure)

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FINAL DRIVES



Sump Capacity: (Each) 23 Liters (6 Gal.)

Final Drive Type: Double Reduction Planetary



1. Oil may transfer between the transmission andfinal drive compartments through a damaged axleshaft seal.


Train Oil (TDTO).

2. When operating in water, check for water and/orsilicon entry.

3. Thrust rings on sun gear are not metallic and donot show a wear metal.

4. Planet bearings are tapered roller bearings.

5. Inspection plate and magnetic plug are availableon final drive cover. Some metallic fuzz is normalon plug. Chips or flakes are abnormal.


CopperOil additives (no failure)BushingsAnti-seize compounds (no failure)

IronGearsBearingsSplinesFinal drive housingShafts

ChromiumBearings

TinRoller bearings



SodiumWater entryOil additives (no failure)

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WINCH

Model: 58


Sump Capacity: (Each) 23 Liters (6 Gal.)

Final Drive Type: Double Reduction Planetary



1. Winch oil to transmission through pump shaftseal

2. Winch oil to transmission through drive shaft seal


Train Oil (TDTO).

2. Oil pump for winch driven at flywheel housingdrive gears.

3. Discs are cellulose fiber and do not show a wearmetal. The mating steel plates will show iron (Fe)wear particles.


CopperSleeve bearing

IronGearsBearingsClutch platesSplinesShafts

ChromiumBearings

TinRoller bearings



SodiumOil additives (no failure)Water leaks

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