High Pressure Safety Valve HVAC: Service and Repair

COMPRESSOR PRESSURE RELIEF VALVE REPLACEMENT

TOOLS REQUIRED
J 39400-A Halogen Leak Detector

REMOVAL PROCEDURE
1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Raise and support the vehicle. Refer to Vehicle Lifting.




3. Remove pressure relief valve from compressor hose.

INSTALLATION PROCEDURE




1. Lubricate the pressure relief valve O-ring with new R-12 mineral compressor oil. Refer to O-Ring Replacement.

IMPORTANT: Use R-12 refrigerant oil (mineral) to lubricate O-rings. Use of R-134a (PAG) oil will cause premature corrosion of fitting joints.

2. Install the pressure relief valve to the compressor hose.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the pressure relief valve to 10 N.m (89 in ft).

3. Lower the vehicle.
4. Evacuate and charge the A/C system. Refer to Refrigerant Recovery and Recharging.
5. Test the affected A/C joint for leaks using J 39400-A.