Compressor Clutch: Testing and Inspection

Compressor clutch components should always be inspected closely before they are reinstalled. The clutch plate and clutch pulley are mated at the factory using a burnishing operation. No attempt should be made to separately replace the compressor clutch pulley or clutch plate. The clutch coil may be serviced separately.

1. Examine the friction surfaces of the clutch pulley and the clutch plate for wear. The clutch pulley and clutch plate should be replaced if there is excessive wear or scoring.
2. Examine the friction surfaces of the clutch pulley and the clutch plate for oil contamination. If the friction surfaces are oily, the clutch pulley and clutch plate should be replaced. Also inspect the shaft and nose area of the compressor for oil. Remove the felt packing from around the compressor shaft in the compressor front cover. If the felt is saturated with oil, the compressor front shaft seal is leaking and the compressor will also have to be replaced.
3. Check the clutch pulley bearing for roughness or excessive leakage of grease. Replace the clutch pulley and clutch plate if the bearing is faulty.