VALVE GP-MAIN CONTROL 4372874 - Caterpillar

Removal
Illustration 1 g00742981
(1) Bolt (2) Drive belt (3) Suction and discharge hoses (4) Compressor
Remove the refrigerant charge. Refer to the Testing and Adjusting, "Refrigerant Recovery" section.
Disconnect electrical wires from the magnetic clutch.
Loosen all the mounting bolts and loosen the belt tightener (if equipped). Remove drive belt (2) .
Disconnect hoses (3) and put plugs or caps on the hoses. Put plugs or caps on the fittings of the compressor. Put identification marks on the hoses. The marks will ensure that the hoses will be connected correctly at a later time.
Remove all the mounting bolts and remove the compressor (4) . The weight of the compressor is approximately 18 kg (40 lb).Installation
Check the amount and condition of the oil in the compressor (4) . Refer to the Testing and Adjusting, "Refrigerant Compressor Oil-Test" section.
Inspect the drive belt (2) . If the drive belt (2) is damaged or worn replace the belt.
Install the compressor (4) . Do not tighten the mounting bolts until drive belt (2) is installed and adjusted.
Connect the discharge and the suction hoses (3) to the discharge and suction ports on the compressor.
Connect the electrical wires to the magnetic clutch.
Evacuate the system. Refer to the Testing and Adjusting, "Refrigerant System - Evacuate" section.
Charge the system. Refer to the Testing and Adjusting, "Refrigerant System - Charge" section.
For the correct system operation, refer to the Troubleshooting Section in this manual.Note: Refer to the Specifications, "Refrigerant Compressor" in the Section for the correct belt tension.
For the oil level in the system, refer to Service Manual, "Refrigerant Compressor Oil - Check".