Compressor Shaft Seal: Testing and Inspection

1. Install manifold gauge set.
2. Check compressor drive belt tension.
3. Run engine at approx. 1,500 rpm.
4. Check compressor for following:
- Low pressure gauge reading is not lower and high pressure gauge reading is not higher than abnormal.
- Metallic sound.
- Leakage from shaft seal. if any of the above is not satisfactory, repair the compressor.
5. Check magnetic clutch.
- Lift-up the vehicle.
- Inspect the pressure plate and the rotor for signs of oil.
- Check the clutch bearings for noise and leaking grease.
- Using an ohmmeter, measure the resistance of the stator coil be between the clutch lead wire and ground.

Standard resistance : 3.23 ± 0.08 Ohms at 12.8 V, 20° C (68° F)

If resistance value is not as specified, replace the coil.
- Connect the positive (+) lead from the battery to terminal, check that the magnetic clutch is energized. if magnetic clutch is not energized, replace the coil.

CAUTION: Do not short the positive (+) lead wire on the vehicle by applying battery voltage.