MANIFOLD-EXH-YM 3863060 - Caterpillar

Symptoms
Before you complete any procedure, read Troubleshooting, "Troubleshooting Procedures" in this module.
"High Power Train Oil Temperature"High Power Train Oil Temperature
Follow this procedure if the oil gauge consistently operates in the warning region (red indicator). Also, follow this procedure if the light for the oil temperature comes on.
Check the operation of the machine.
Determine if the machine has been operating at stall condition or near stall condition.Expected Results
The machine has been operating at stall condition.Results
NO: Proceed to Step 2.
YES: The operating conditions are a probable cause of the symptom. Inform the operator of the cause of the problem.
Check the temperature gauge.
Inspect the temperature gauge for proper operation.
Repair the components and/or replace the components, if necessary.
Check the operation of the machine for the original problem.Expected Results
The original problem is resolved.Results
OKAY: Stop.
NOT OKAY: Proceed to Step 3.
Check the temperature sender.
Check the operation of the temperature sender.
Repair the components and/or replace the components, if necessary.
Check the operation of the machine for the original problem.Expected Results
The original problem is resolved.Results
OKAY: Stop.
NOT OKAY: Proceed to Step 4.
Check the cooling system.
Check for restrictions in the oil cooler lines.
Check for restrictions in the cores of the oil cooler.
Repair the components and/or replace the components, if necessary.
Check the operation of the machine for the original problem.Expected Results
The original problem is resolved.Results
OKAY: Stop.
NOT OKAY: Proceed to Step 5.
Personal injury can result if the machine moves while testing.If the machine begins to move during test, reduce the engine speed immediately and engage the parking brake.
Measure the pressure at the torque converter inlet.Note: Measure the pressure when the oil is cold. Do not allow the machine to reach the normal operating temperature before you measure the pressure.Reference: Refer to Testing and Adjusting, "Relief Valve (Torque Converter Inlet) Pressure - Test and Adjust" that is in this module.
Expected Results
The pressure is correct.Results
OKAY: Stop.
NOT OKAY: Change the oil. Change the oil filter elements and clean the screens. Check the operation of the machine for the original problem. If the conditions are not resolved, proceed to Step 6.
Adjust the pressure of the Torque Converter Inlet Relief Valve.Reference: Refer to Testing and Adjusting, "Relief Valve (Torque Converter Inlet) Pressure - Test and Adjust" that is in this module.
Expected Results
The pressure is 900 kPa (130 psi).
The original problem is resolved.Results
OKAY: Stop.
NOT OKAY: Proceed to Step 7.
Check the system pressure.Reference: Refer to Testing and Adjusting, "Main Relief Valve - Adjust" that is in this module.
Expected Results
The system pressure is correct.
The original problem is resolved.Results
OKAY: Stop.
NOT OKAY: The cause of the problem may be the adjustment of the main relief valve. The main relief valve maintains the system pressure in the control section of the power train oil pump. Proceed to Step 8.
Adjust the main relief valve.
Expected Results
The main relief pressure is correct.
The original problem is resolved.Results
OKAY: Stop.
NOT OKAY: Proceed to Step 9.
System Pressure Is Low.Repeat the procedure in Step 7.Results
REPAIRED OKAY: Stop.
NOT OKAY: Proceed to Step 10.
Check the scavenge screen.
Inspect the scavenge line screen.
Check for obstructions.Reference: Refer to Systems Operation, "Magnetic Screen" in the Service Manual for