TUBE 3155705 - Caterpillar

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(17) Oil screen for hoist (18) Oil screen for the rear brake coolingRemove oil screens (17) and (18). Inspect screens (17) and (18) for foreign material or for restrictions.Problem: Rubber particles are found.
Probable Cause
Seal failure
Hose failureProblem: A large quantity of aluminum particles are found in the hoist and rear brake cooling screens.
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(13) Pump drive (14) Hoist and rear brake cooling gear pumpNote: A small amount of aluminum particles is normal.Probable Cause
Mechanical failure of the hoist and rear brake cooling gear pump (14) .Check: Check the parts inside the hydraulic tank.
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(19) Return screen for oil from the hoist (20) Suction screen for torque converter and parking brake release oil (22) Suction screen for hoist and rear brake cooling oilDrain the oil from the hydraulic tank. Remove the outer cover from the hydraulic tank. Inspect the bottom of the hydraulic tank for debris. Remove screen (19) and inspect the screen for foreign materials. Remove the hoses from the back of the hydraulic tank in order to remove suction screens (20) and (22) and clean the suction screens.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines.Dispose of all fluids according to local regulations and mandates.
Problem: Rubber particles are found.
Probable Cause
Seal failure
Hose failureProblem: Shiny steel particles are found.
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784B Torque converter, parking brake release, and pulled unit brake cooling gear pump (7) Cover for the torque converter scavenge screen (8) Torque converter scavenge pump section (9) Torque converter charging pump section (10) Parking brake release pump section (11) Pulled unit brake cooling pump
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785B Torque converter and the parking brake release gear pump (7) Cover for the torque converter scavenge screen (8) Torque converter scavenge pump section (9) Torque converter charging pump section (10) Parking brake release pump section
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(13) Pump drive (14) Hoist and rear brake cooling gear pumpProbable Cause
Mechanical failure of the torque converter scavenge pump section (8)
Mechanical failure of parking brake release pump section (10). See "Check the parking brake release hydraulic filter.".
Mechanical failure of the torque converter charging pump section (9). See "Check the torque converter hydraulic filter.".
Mechanical failure of oil pump drive (13). See "Check the torque converter scavenge screen.".
Mechanical failure of rear brake cooling pump section (11). See "Check the torque converter and front brake cooling screen. Check the oil cooler screens for the rear brakes.". Inspect screens (3) .Problem: Aluminum particles are found.
Probable Cause
Mechanical failure of the torque converter. See "Check the torque converter scavenge screen.".Problem: A large quantity of aluminum particles are found.
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(13) Pump drive (14) Hoist and rear brake cooling gear pumpNote: A small amount of aluminum particles is normal.Probable Cause
Mechanical failure of the hoist and rear brake cooling gear pump (14) .Problem: Black