SENSOR GP-PRESSURE 3840427 - Caterpillar

Illustration 5 g00288134
(5) Parking brake release pump section is on the oil pump drive.Problem 2:Shiny steel particles are found.Probable Cause:
Mechanical failure of parking brake release pump section (5) Check 4:
Illustration 6 g00288135
Rear Brake Oil Coolers (6) Screen.
Illustration 7 g00288216
Front Brake Oil Cooler (7) Oil filters are in front of the fuel tank.Remove screens (6) for the rear brake oil coolers. Inspect screens (6). Cut the screens open, if necessary. Remove oil filters (7) for the front brake oil coolers. Inspect oil filters (7) .Problem 1:Rubber particles are found.Probable Cause:
Seal failure
Hose failure
Illustration 8 g00288217
(8) Brake cooling pump section.Problem 2:Shiny steel particles are found in screen (6) .Probable Cause:
Mechanical failure of any brake cooling pump section (8)
Illustration 9 g00288134
Oil Pump Drive (5) Parking brake release pump section.
Illustration 10 g00288218
Oil Pump Drive (9) Two-section pump (hoist and front brake cooling).Problem 3:Shiny steel particles are found in oil filters (7) for the front brake oil coolers.Probable Cause:
There is a mechanical failure of parking brake release pump section (5). See Check 3.
There is a mechanical failure of two-section pump (9). See Check 5.Check 5:
Illustration 11 g00288219
Hoist Control Valve (10) Hoist screens.Remove hoist screens (10). Inspect hoist screens (10) for foreign material or for restrictions.Problem 1:Rubber particles are found.Probable Cause:
Seal failure
Hose failure
Illustration 12 g00288218
Oil Pump Drive (9) Two-section pump (hoist and front brake cooling).Problem 2:Shiny steel particles are found.Probable Cause:
Mechanical failure of two-section pump (9) Check 6:
Illustration 13 g00288220
Rear of Hydraulic Tank (11) Tank drain. (12) Suction screens (hoist). (13) Suction screen (brake cooling and parking brake release). (14) Suction screens (brake cooling).Drain the oil from the hydraulic tank at tank drain (11). Inspect the bottom of the hydraulic tank for debris. Remove suction screens (12), (13), and (14) and clean the suction screens. Remove the screens which surround each rear brake oil cooler relief valve. Inspect these screens for foreign materials.Problem 1:Rubber particles are found.Probable Cause:
Seal failure
Hose failure
Illustration 14 g00288221
(5) Parking brake release pump section. (8) Brake cooling pump section. (9) Two-section pump (hoist and front brake cooling) is on the oil pump drive.Problem 2:Shiny steel particles are found.Probable Cause:
There is a mechanical failure of parking brake release pump section (5). Perform Check 3.
There is a mechanical failure of brake cooling pump section (9). Perform Check 4.
There is a mechanical failure of two-section pump (9). Perform Check 5.Problem 3:Pieces of red, nonferrous material are found. These pieces are part of the brake disc.Probable Cause:
Failure of the wheel brakesProblem 4:Shiny steel particles and/or chrome particles are found.Probable Cause:
There is a mechanical failure of a hydraulic cylinder and/or of a cylinder rod. Inspect the cylinder rods for scoring.Note: If any of the above particles are found during any visual checks, all components of the hydraulic system and of the brake cooling system must be cleaned. Do not use any damaged parts. Damaged parts must be replaced with new parts.