A/C Compressor
EXTERNAL LEAK TEST1. If the A/C compressor is on the vehicle, recover the system. Remove the A/C compressor from the vehicle. Observe all safety precautions.
2. Remove the manifold retaining bolt and remove the manifold from the rear head of the A/C compressor. Install pressure test adapter on the rear head of the A/C compressor using the existing manifold attaching bolt.
3. Connect the high and low pressure lines of Rotunda R-134a Manifold Gauge Set 176-R032A or equivalent to the corresponding fittings on the pressure test adapter.
4. Attach the center hose of the manifold gauge set to a refrigerant container standing in an upright position.
5. Using the clutch hub, hand-rotate the A/C compressor shaft ten revolutions to distribute the oil inside the A/C compressor.
6. Open the low pressure gauge valve, the high pressure gauge valve, and the valve on the refrigerant container to allow the refrigerant vapor to flow into the A/C compressor.
7. Using Rotunda R-134a Automatic Calibration Halogen Leak Detector or equivalent check for leaks at the compressor shaft seal and the compressor center seal.
8. If a shaft seal leak is found, install a new shaft seal. If an external leak is found at the center joint of the A/C compressor, install a new A/C compressor assembly.
9. When the leak test is completed, close the manifold gauge valves (both high and low) as well as the valve on the refrigerant container.
10. Recover the refrigerant from the compressor. Then, remove the gauge set hoses from the pressure test fitting tool.
11. Install the A/C compressor on the vehicle.
12. Leak test, evacuate, and charge the system. Observe all safely precautions.