PLATFORM AR 3534620 - Caterpillar

Illustration 1 g00649511
(1) Filler plug (2) Drain plugRemove filler plug (1). The filler plug (1) is magnetic. Check the filler plug (1) for metallic particles. Check the oil level in each final drive. When the oil level is checked, be certain that drain plug (2) is down in the lowest position. Check for oil leakage on the rear tires and wheels. Refer to your Operation and Maintenance Manual in order to determine the correct oil to use.Problem: The filler plug has metal shavings.
Probable Cause
Mechanical failure of one or both of the final drives
Mechanical failure of any of the components that are located inside the rear axle housingProblem: The oil level in a final drive is too high and the oil level in the hoist and brake hydraulic tank is too low.
Illustration 2 g00471092
(3) Seal assembly (4) Duo-Cone seal (5) Duo-Cone seal (6) O-ring sealProbable Cause
The brake cooling oil is leaking into the final drive. Duo-Cone seal (5) at the rear wheel brake has failed.
The brake cooling oil is leaking into the final drive. Seal assembly (3) at the rear wheel brake has failed.
The brake cooling oil is leaking into the final drive. O-ring seal (6) at the rear wheel brake has failed.Note: To determine the wheel that is leaking, perform the test in the Air System and Brakes Systems Operation/Testing and Adjusting, "Internal Brake Leakage - Check".Problem: The oil level in a final drive is too low.
Probable Cause
The oil is leaking to the ground. Failure of the O-ring seal on the final drive housing.
The oil is leaking to the ground. Duo-Cone seal (4) at the rear wheel brake has failed.Check: Check the oil level in the rear axle housing.
Illustration 3 g00649514
(7) Filler plug (8) Drain plugRemove filler plug (7). Check the oil level in the rear axle housing. The oil level should be at the bottom of filler plug (7). Check for leakage under the housing. Refer to your Operation and Maintenance Manual in order to determine the correct oil to use.Problem: The oil level in the rear axle housing is too high and the oil level in the hydraulic tank is too low.
Illustration 4 g00471092
(3) Seal assembly (4) Duo-Cone seal (5) Duo-Cone seal (6) O-ring sealProbable Cause
The brake cooling oil is leaking into the final drive. Duo-Cone seal (5) at the rear wheel brake has failed.
The brake cooling oil is leaking into the final drive. Seal assembly (3) at the rear wheel brake has failed.
The brake cooling oil is leaking into the final drive. O-ring seal (6) at the rear wheel brake has failed.Note: To determine the wheel that is leaking, perform the test in the Air System and Brakes Systems Operation/Testing and Adjusting, "Internal Brake Leakage - Check".Problem: The oil level in the rear axle housing is too low and the oil level in the transmission section of the hydraulic tank is too high.
Probable CauseThe oil of the differential and bevel gear is leaking into the transmission case. This could be caused by one of the following problems:
Failure of the