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Home >> GMC >> 1983 >> Forward Control 7.4 W, Standard >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> A/C System General Servicing >> Compressor Oil Checking >> Purging Compressor
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Purging Compressor

  1. Remove gauge set and place caps on service valve ports. Back-seat the suction service valve to allow refrigerant to enter compressor.
  2. Loosen discharge port valve slightly. Loosen valve port cap to allow refrigerant to force out air from compressor. Back-seat the discharge valve and tighten the port cap. Compressor is ready for service.