CORE AS-CONDENSER 3342923 - Caterpillar

Torque Converter
The information that follows can be used to diagnose problems in the torque converter. This information does not list every possible problem. The problem could be in the engine or the transmission.No. 1. ProblemThe torque converter gets hot.Probable Cause
Defective temperature gauge or sending unit
Long periods of operation with the torque converter at stall speed or near stall speed
Cooling system operation is not correct.
Cores in the oil cooler are not completely open.
Restriction in the oil cooler lines
Low oil pressure
Low oil level
The ratio valve in the torque converter is not operating correctly.
Torque converter outlet relief valve that is not closing
Leakage around seals in the torque converter
Air in the oil system
Torque converter scavenge line that is restricted or plugged
Mechanical failure in the torque converterNo. 2. ProblemHigh torque converter inlet pressure.Probable Cause
Ratio valve in the torque converter that is not operating correctly
Restrictions in the torque converter outlet relief valve
Restrictions in the outlet line to the oil coolerNo. 3. ProblemLow torque converter inlet pressure.Probable Cause
Defective torque converter charging pump
Ratio valve in the torque converter
Dirt or foreign material will not allow the valve to close.
Torque converter outlet relief valve
Weak spring
Dirt or foreign material will not allow the valve to close.
Leakage around seals in the torque converterNo. 4. ProblemThere are noises in the torque converter that have the sound of metal to metal contact.Probable Cause
Bearings with excessive wear or damage
Loose turbine, impeller, or stator blades
Too much side load on the output shaftBrakes
No. 1. ProblemThe brakes will not engage.Probable Cause
The operation of the brake pedal linkage or the adjustment of the linkage is not correct.
The valve spool in the brake control valve does not move freely.
The brake plates or the discs have excessive wear or damage.No. 2. ProblemBoth brakes will not release.Probable Cause
The operation of the brake pedal linkage or the adjustment of the linkage is not correct.
The valve spool in the brake control valve does not move freely.
Low oil pressure
The parking brake valve and the linkage does not work correctly.Checks During Operation
Operate the machine in each direction and at all speeds. Take note of all noises that are not normal. Locate the source of those noises. When the operation of the machine is not correct, refer to the "Troubleshooting" section of this manual. This section lists "problems" and "probable causes".