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Home >> Infiniti >> 2004 >> QX56 RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1228 (Automatic Air Conditioner) >> Lubricant >> Maintenance of Lubricant Quantity in Compressor >> Checking And Adjusting >> Lubricant Adjustment Procedure for Compressor Replacement

Lubricant Adjustment Procedure for Compressor Replacement

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
  1. Before connecting recovery/recycling equipment to vehicle, check recovery/recycling equipment gauges. No refrigerant pressure should be displayed. If NG, recover refrigerant from equipment lines.
  2. Connect recovery/recycling equipment to vehicle. Confirm refrigerant purity in supply tank using recovery/recycling equipment and refrigerant identifier. If NG, refer to "CONTAMINATED REFRIGERANT ".
  3. Confirm refrigerant purity in vehicle A/C system using recovery/recycling equipment and refrigerant identifier. If NG, refer to "CONTAMINATED REFRIGERANT ".
  4. Discharge refrigerant into the refrigerant recovery/recycling equipment. Measure lubricant discharged into the recovery/recycling equipment.
  5. Drain the lubricant from the "old" (removed) compressor into a graduated container and recover the amount of lubricant drained.
  6. Drain the lubricant from the "new" compressor into a separate, clean container.
  7. Measure an amount of new lubricant installed equal to amount drained from "old" compressor. Add this lubricant to "new" compressor through the suction port opening.
  8. Measure an amount of new lubricant equal to the amount recovered during discharging. Add this lubricant to "new" compressor through the suction port opening.
  9. If the liquid tank also needs to be replaced, add an additional 5 ml (0.2 US fl oz, 0.2 Imp fl oz) of lubricant at this time.

    Do not add this 5 m l (0.2 US fl oz, 0.2 Imp fl oz) of lubricant if only replacing the compressor. 

    Fig 1: Lubricant Adjusting Procedure For Compressor Replacement
    G02385456Courtesy of NISSAN MOTOR CO., U.S.A.