VALVE GP-CONTROL 1850496 - Caterpillar

Probable Causes
Power train oil level is low
The power train oil cooler has leaks
The power train oil contains a large amount of air
The temperature gauge is not operating properly.
The power train oil cooler is plugged.
The fan motor is not operating properly
The scavenge screen is obstructed. There is a large amount of oil.
Cold oil by-pass valve leaking back to tank.Recommended Actions
Note: Care must be taken in order to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the machine. You must be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component that contains fluid. Dispose of all fluids according to local regulations.Power Train Oil Level Is Low
Ensure that the power train oil level is in between "OPERATING ZONE" marks on the dipstick. Refer to Operation and Maintenace Manual, SEBU8200, "Power Train Oil Level - Check".If the oil level is low proceed, to "The Power Train Oil Cooler has Leaks" in order to determine if the power train oil is leaking.The Power Train Oil Cooler has Leaks
Inspect the oil and coolant reservoirs on the machine and perform an SOS analysis to determine if there is cross contamination between the systems.Look for leaks, increased fluid levels in other systems (cross contamination), increased levels in the propulsion module sump, or any oil at all that has accumulated in the generator housing.Thoroughly examine all surfaces, tubes, and connections on the power train oil cooler for signs of leaks. If oil is leaking, dirt and dust will adhere to the oily surfaces more than dry surfaces. Tighten any loose connections or fittings that might be leaking and recheck for leaks. The power train oil cooler should be replaced if there are leaks on surfaces in addition to the fittings.Note: Be sure to differentiate between coolant that may be leaking and oil that may be leaking. The odor may help to make this determination.The Power Train Oil Contains A Large Amount Of Air
Obtain a power train oil sample.The sampling valve for the power train oil is located on the power train oil filter on the left side of the machine. Refer to Special Publication, SEBU6250, "Fluid Recommendations for All Caterpillar Machines, S O S Oil Analysis" for information that pertains to obtaining a sample of the power train oil. Refer to Special Publication, PEHP6001, "How To Take A Good Oil Sample" for more information about obtaining a sample of the transmission oil.Check the hydraulic lines and check the fittings on the inlet side of the power train oilpump for leaks. Hydraulic lines and hoses that are part of the suction side of a circuit can draw air into the system during operation if there is a failed connection,a failed hose or a failed line.The Temperature Gauge Is Not Operating Properly
The sensor outputs a voltage signal that corresponds to the temperature of the power train oil. The voltage signal is input to the machine ECM. As the temperature of the power train oil changes,