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Personal injury or death can result from sudden machine movement. Sudden movement of the machine or release of oil pressure can cause injury to persons on or near the machine. To help prevent possible injury or death, refer to the information in Testing and Adjusting, "Machine Preparation for Troubleshooting". |
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Problem
Torque Converter Inlet
The pressure for the pump is correct, but the pressure at the torque converter inlet is too low.
Possible Cause
- The relief valve for the torque converter and the oil cooler is open.
- There is too much leakage in the transmission hydraulic control.
- There are worn seals in a clutch of the transmission.
The torque converter inlet pressure is too high.
Possible Cause
- There is a restriction in the line that is downstream of the relief valve for the torque converter and the oil cooler.
Problem
Torque Converter Outlet
The engine speeds are out of specification.
Possible Cause
- Refer to Systems Operation, Testing and Adjusting, SENR5816, "Troubleshooting" for problems that involve the engine.
- The torque converter has failed.
The torque converter stall speed is too high when the high idle rpm is correct and the torque converter outlet pressure is correct.
Possible Cause
- The torque converter has failed.
- The engine has too much power.
The torque converter outlet pressure is too low, and the oil gets too hot during normal operation.
Possible Cause
- Faulty relief Valve (torque converter inlet)
The torque converter outlet pressure is too low.
Possible Cause
- Faulty relief Valve (torque converter inlet)
The torque converter outlet pressure is correct, and the oil gets too hot during normal operation.
Possible Cause
- The power train oil cooler is not operating properly.
Lack of power
Possible Cause
- The rated engine speed is low at the converter.
- The transmission hydraulic system is overheating.
Problem
Torque Converter Housing
There is noise at the torque converter housing
Possible Cause
- Worn pump
- Worn bearings