GASKET 1958278 - Caterpillar

Compressor rotation is abnormal
Diagnostics
If the electrical system and the clutch do not function, check the wiring and see steps 2, 3, 4, 5, 6, and 7. If the magnetic clutch is poor, see steps 17, 18, 19, and 20. If the V-belt is worn or the V-belt slips replace the belt. If the compressor is locked up, replace the compressor.
If the air conditioning switch is poor, replace the control panel.
If the blower switch is poor, replace the control panel.
If the clutch relay on the compressor is poor, replace the clutch relay.
If the thermo-sensor is poor, replace the thermo-sensor.
If the high and low pressure switch is poor replace the pressure switch.
If high pressure is abnormally high, see steps 8, 9, 10, and 11. If high pressure is abnormally low, see steps 12, 13, 14, 15, and 16.
If the outside temperature is abnormally high there is an insufficient amount of cooling.
If the condenser is not being cooled, the condenser could be clogged. Clean the condenser with water.
If the refrigerant is overcharged remove the fluid until the correct level is obtained.
If the air is mixed in the freezing cycle, evacuate the refrigerant. Refill the refrigerant to the correct level.
The outside temperature is abnormally low.
If the refrigerant is low there could be an insufficient refrigerant charge. Recharge the refrigerant to the correct level. If the refrigerant is low there could be a gas leak. Perform the leak and the repair test. Recharge the refrigerant to the correct level.
If the receiver and the dryer are clogged repair the system. If the piping is clogged with debris, repair the system.
If the expansion valve is poor the valve could be clogged. The thermal tube could have a gas leak. Replace the valve. If the expansion valve is poor, the expansion valve is frozen. Replace the valve and the receiver. Evacuate the valve completely.
Check the clutch circuit. If necessary, replace the clutch relay. Check the wiring of the frost sensor for a short. If necessary, repair the wiring. Check the characteristics of the frost sensor. If necessary, replace frost sensor. Check the gap between the frost sensor and the evaporator. If necessary, adjust the gap distance. See "Specifications".
If there is an open circuit in the stator coil replace the clutch.
If the air gap is too much between the rotor and the stator replace the clutch or repair the clutch.
If the clutch rattles check the key for breakage. If necessary, replace the key. Check the clutch surface for contamination. If necessary, replace the clutch. Check the battery for a voltage drop. If necessary, charge the battery.
If there is debris that is trapped between the rotor and the stator, disassemble the clutch and repair the clutch. Air flow is short
If the blower motor rotates, see "Blower motor rotates". If the blower motor does not rotate, see "Blower motor does not rotate".Blower motor rotates
Diagnostics
If the rotation is correct, see steps 2, 3, 4, 5, 6, and 8. If the rotation is slow, see steps 9, 10, 11, and 12.
If