Off Vehicle Testing

1. If compressor is on vehicle, discharge system, then remove compressor from vehicle.
2. Remove manifold bolt, then manifold from rear head of compressor. Install pressure test adapter on rear head of compressor using manifold bolt.
3. Connect high and low pressure lines of a R-134a manifold gauge set to corresponding fittings on pressure test adapter, then attach center hose of manifold gauge set to a suitable refrigerant container standing in an upright position.
4. Using clutch hub, hand-rotate compressor shaft ten revolutions to distribute oil inside compressor.
5. Open low pressure gauge valve, then high pressure gauge valve and valve on refrigerant container to allow refrigerant vapor to flow into compressor.
6. Using Rotunda R-134a Halogen Leak Detector 161-00010, or equivalent, 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 compressor, install a new compressor assembly.
8. When leak test is completed, close manifold gauge valves (high and low) and valve on refrigerant container. Slowly remove gauge set hoses from pressure test fitting tool (allow refrigerant to escape from compressor).
9. Install compressor on vehicle, then leak test, evacuate and charge system.