High Pressure Safety Valve HVAC: Service and Repair

COMPRESSOR PRESSURE RELIEF VALVE

REMOVAL

1. Disconnect negative battery cable

IMPORTANT: Verifying the purity of the refrigerant with a purity identifier before recovery is recommended.

2. Recover refrigerant using an approved refrigerant recovery system. Measure the amount of oil lost during recovery and record.

CAUTION: MAKE SURE VEHICLE IS PROPERLY SUPPORTED AND SQUARELY POSITIONED. TO HELP AVOID PERSONAL INJURY WHEN A VEHICLE IS ON A HOIST; PROVIDE ADDITIONAL SUPPORT FOR THE VEHICLE ON THE OPPOSITE END FROM WHICH COMPONENTS ARE BEING REMOVED.




3. Raise vehicle.
4. Disconnect compressor clutch electrical connector.

CAUTION: DO NOT REMOVE PRESSURE RELIEF VALVE BEFORE SYSTEM IS FULLY DISCHARGED.

NOTE: When servicing the compressor keep dirt and foreign material from getting on or into the compressor parts and system. Clean tools and clean work area are important for proper service. The compressor should be cleaned before any on car repairs, or before removal of the compressor. The parts must be kept clean at all times and any parts to be assembled should be cleaned with a non-petroleum based solvent and dried with air. Use only lint free cloths to wipe parts. Do not allow solvent to enter compressor or hoses.




5. Remover pressure relief valve.

INSTALLATION




1. Lubricate pressure relief valve O-ring with R-12 mineral oil and install into compressor.

Torque: 12 N.m (106 in-lbs)




2. Connect compressor clutch electrical connector.




3. Lower vehicle.
4. Connect negative battery cable.

Torque: 17 N.m (151 in-lbs)

5. Evacuate, charge, and leak check the A/C system.
6. Run A/C performance test.