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A/C Compressor, External Leak Test

NOTE: For in-depth leak testing procedures, see LEAK TESTING in GENERAL SERVICING PROCEDURES article in GENERAL SERVICING.
  1. Install A/C pressure test adapter on rear head of A/C compressor using existing manifold retaining bolt.
  2. Connect high and low pressure lines of a manifold gauge set to corresponding fittings on A/C pressure test adapter.
  3. Attach center hose of manifold gauge set to a refrigerant container standing in an upright position.
  4. Hand-rotate compressor shaft 10 complete revolutions to distribute oil inside A/C compressor.
  5. Open low pressure gauge valve, high pressure gauge valve and valve on refrigerant container to allow refrigerant vapor to flow into A/C compressor.
  6. Using an Automatic Calibration Halogen Leak Detector, check for leaks at compressor shaft seal and compressor center seal.
  7. If a shaft seal leak is found, install a NEW shaft seal. If an external leak is found at center joint of A/C compressor, install a NEW A/C compressor.
  8. When leak test is complete, recover refrigerant from compressor.
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