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Home › GMC › 1985 › Forward Control 6.2 J, Standard › Repair and Diagnosis › Heating, Ventilation & A/C (HVAC) › A/C Compressor Oil Checking › Compressor Oil Checking - General Procedures › Purging Compressor

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.
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