C 3500 Truck 2WD V8-454 7.4L (1990)
High Pressure Safety Valve HVAC: Service and Repair
With R-4 Compressor
Compressor Component View
Remove or Disconnect
1. Valve.
2. O-ring.
Install or Connect
1. New O-ring coated with 525 refrigerant oil.
2. Valve.
