2057959 BLOCK AS Caterpillar parts
Rating:
Alternative (cross code) number:
CA2057959
205-7959
2057959
CA2057959
205-7959
2057959
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Probable Causes of Transmission Problems
Problem 1The transmission does not operate in any speed or the transmission slips in all speeds.Probable causes
The fuse for the power train control is defective.
There is a problem in the electrical circuit.
Oil pressure is low. This may be caused by any of the following conditions:Low oil levelA dirty oil strainer or a restriction in the oil flow circuitOil pump failure.Air leaks on the inlet side of the pump.Leakage inside the transmission (worn seals around the clutch piston)Modulating relief valve (13) is stuck open.There is a torque converter failure.There is a mechanical failure in the transmission.Clutch discs and clutch plates are excessively worn.The torque converter impeller clutch is not engaged.Problem 2The transmission overheats.Probable causes
Coolant level in the radiator is low.
The machine is being used for the wrong application. There is too much torque converter slip, which is caused by too much load.
Incorrect transmission gear is being used for the load that is on the machine. Shift to a lower gear.
The temperature gauge is defective.
The oil level is incorrectly high or low.
The oil cooler or oil lines are restricted.
The clutch slips too much. This may be caused by any of the following conditions:Low oil pressure. Refer to the Problem: The transmission does not operate in any speed or the transmission slips in all speeds.A clutch is damaged.Oil flow is low. This may be caused by pump wear or by leakage in the hydraulic system.There is air in the oil. This may be caused by air leaks on the intake side of the pump.The magnetic screen for the pump inlet is plugged.Torque converter inlet relief valve (11) is stuck open. This causes low oil flow through the torque converter.
The clutch or clutches are not fully released. (This is called clutch drag.) This may be caused by any of the following conditions:Warped plates or warped discsReturn spring that is broken or weakProblem 3Pump noise that is not heard normally.Probable causes
A loud noise at short intervals indicates that foreign material is in the transmission hydraulic system.
A constant loud noise indicates pump failure.
There is air at the inlet side of the pump.Problem 4Noise in the transmission that is not normalProbable causes
Damaged gears
Worn teeth of the clutch plates and/or clutch discs
Slipping clutch plates and noise from clutch discs
Other worn transmission components or damaged transmission componentsProblem 5The transmission operates in FORWARD only.Probable causes
Number 1 REVERSE clutch solenoid (4) is inoperative.
There is a problem in the electrical circuit.
The REVERSE clutch is not engaged or the REVERSE clutch slips. This may be caused by any of the following conditions:Low oil pressure due to leaking piston sealsThe clutch discs and
Problem 1The transmission does not operate in any speed or the transmission slips in all speeds.Probable causes
The fuse for the power train control is defective.
There is a problem in the electrical circuit.
Oil pressure is low. This may be caused by any of the following conditions:Low oil levelA dirty oil strainer or a restriction in the oil flow circuitOil pump failure.Air leaks on the inlet side of the pump.Leakage inside the transmission (worn seals around the clutch piston)Modulating relief valve (13) is stuck open.There is a torque converter failure.There is a mechanical failure in the transmission.Clutch discs and clutch plates are excessively worn.The torque converter impeller clutch is not engaged.Problem 2The transmission overheats.Probable causes
Coolant level in the radiator is low.
The machine is being used for the wrong application. There is too much torque converter slip, which is caused by too much load.
Incorrect transmission gear is being used for the load that is on the machine. Shift to a lower gear.
The temperature gauge is defective.
The oil level is incorrectly high or low.
The oil cooler or oil lines are restricted.
The clutch slips too much. This may be caused by any of the following conditions:Low oil pressure. Refer to the Problem: The transmission does not operate in any speed or the transmission slips in all speeds.A clutch is damaged.Oil flow is low. This may be caused by pump wear or by leakage in the hydraulic system.There is air in the oil. This may be caused by air leaks on the intake side of the pump.The magnetic screen for the pump inlet is plugged.Torque converter inlet relief valve (11) is stuck open. This causes low oil flow through the torque converter.
The clutch or clutches are not fully released. (This is called clutch drag.) This may be caused by any of the following conditions:Warped plates or warped discsReturn spring that is broken or weakProblem 3Pump noise that is not heard normally.Probable causes
A loud noise at short intervals indicates that foreign material is in the transmission hydraulic system.
A constant loud noise indicates pump failure.
There is air at the inlet side of the pump.Problem 4Noise in the transmission that is not normalProbable causes
Damaged gears
Worn teeth of the clutch plates and/or clutch discs
Slipping clutch plates and noise from clutch discs
Other worn transmission components or damaged transmission componentsProblem 5The transmission operates in FORWARD only.Probable causes
Number 1 REVERSE clutch solenoid (4) is inoperative.
There is a problem in the electrical circuit.
The REVERSE clutch is not engaged or the REVERSE clutch slips. This may be caused by any of the following conditions:Low oil pressure due to leaking piston sealsThe clutch discs and