Compressor Pressure Relief Valve Replacement

Removal Procedure

Important

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

1. Recover the refrigerant using an approved refrigerant recovery system.

Caution

Do not remove hoses or lines before system is fully discharged. System may be under pressure and contact with R134a may cause personal injury.

2. Remove the hose bolt from the compressor high side and remove the hose.




3. Remove the pressure relief valve.

Installation Procedure

Notice

Refer to Fastener Notice in Cautions and Notices.

Notice

Use only Polyalkylene Glycol Synthetic Refrigerant Oil (PAG) for internal circulation through the R-134a A/C system and only 525 viscosity mineral oil on fitting threads and O-rings. If lubricants other than those specified are used, compressor failure and/or fitting seizure may result.





1. Lubricate the pressure relief valve O-ring with new R-12 mineral compressor oil. Install the valve and tighten to specification.
Tighten

Tighten the compressor pressure relief valve to 7.2 N·m (63 lb in).





2. Lubricate and install a new O-ring on the discharge hose with R-12 refrigerant mineral oil. Install the high side hose to the compressor high side port. Tighten to specification.
Tighten

Tighten the discharge hose-to-compressor to 25 N·m (19 lb ft).

3. Evacuate, charge, and leak test the A/C system.