K 2500 Truck 4WD V8-6.0L VIN U (1999)
High Pressure Safety Valve HVAC: Service and Repair
Compressor Pressure Relief Valve Install
TOOLS REQUIRED
J 39500-B R-134a A/C Refrigerant Recovery, Recycling and Recharging System (ACR4)
1. Clean the valve seat area on the rear head.
2. Lubricate the O-ring of the new pressure relief valve (5) and the O-ring assembly using new 525 viscosity refrigerant oil.
NOTE: Refer to Fastener Notice in Cautions and Notices.
3. Install the new pressure relief valve (5).
Tighten
Tighten the new valve to 9.0 N.m (6.1 lb ft).
4. Evacuate and recharge the system using the J 39500-B.
5. Leak test the system. Refer to Compressor Leak Testing. See: Compressor HVAC/Service and Repair
