HEAT EXCHANGER GP-SEA WATER 3939278 - Caterpillar

Probable Causes
Contamination of the power train oil
Insufficient pressure oil to the brakes
Transmission clutches
System pressure
Failed brake components
Brake control valve
Proportional solenoid valveContamination Of The Power Train Oil
If the symptom is not active or if the symptom is intermittent, oil contamination may be the problem.Change the power train oil. Change the oil filter element and clean the screens.Insufficient Pressure Oil To The Brakes
Insufficient pressure oil to the brakes is a probable cause of the symptom.The brakes are engaged by spring force. The brakes are released by pressure oil which is sent from the brake control valve to the brakes.Reference: Refer to Testing and Adjusting, KENR8738, "Brake Pressure - Test".Transmission Clutches
Check for transmission drag.
Place pressure gauges on all transmission clutches.
Start the engine.
Disengage the parking brake.
Press down the service brake pedal in order to engage the brakes.
Shift through all the transmission gears.
Check that the clutches engage properly for each gear. Clutches 1 through 5 operate at the main relief pressure for the transmission when the clutch is engaged. Expected Results
The transmission clutches engage properly.Results
OKAY: The engagement of the transmission clutches was eliminated as the source