ROD 2486174 - Caterpillar

Problem: Shiny steel particles are found in the screens for the rear brake oil coolers.
Probable Cause
Mechanical failure of the rear brake cooling section of the torque converter pump (11) .Problem: Aluminum particles are found in the screens for the rear brake oil coolers
Illustration 12 g00313889
(13) Oil 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) . See "Check the hoist and rear brake cooling screens" .Check: Check the hoist and rear brake cooling screens.
Illustration 13 g00347135
(17) Oil screen for the rear brake cooling (18) Oil screen for hoistRemove 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 screen or in the rear brake cooling screen
Illustration 14 g00313889
(13) Oil 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.
Illustration 15 g00313892
(19) Return screen for oil from the hoist (20) Suction screen for torque converter and parking brake release oil (21) Suction screen for rear brake cooling 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) , (21) , 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
Illustration 16 g00313886
Pump for the torque converter, the parking brake release, and brake cooling. (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) Section for rear brake coolingProbable 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