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Home >> GMC >> 1982 >> Magnavan Automatic Trans, Trans Mfr CD 400/M40 >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> General Servicing >> Compressor Oil Check >> Compressor Replacement >> Compressor Isolation Method >> Isolating (Jeep)

Isolating (Jeep)

  1. Connect standard A/C pressure gauge and manifold assembly (J-23575). Close both gauge hand valves and mid-position both service valves. Start engine and operate A/C.
  2. Turn suction service valve slowly clockwise toward front seat position. When suction pressure is reduced to zero or less, stop engine and compressor and quickly finish frontseating suction service valve.
  3. Front-seat discharge service valve. Loosen oil check plug slowly to release any internal pressure in compressor. Compressor is now isolated from system.
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