Re-Machined AC Compressor Shaft

During the course of remanufacturing a compressor, the taper of the input shaft may be re-machined. As a result, the shaft will be shortened and less clearance will remain between the AC clutch and the AC compressor. This can create interference and hinder the rotation of the rotor assembly. Again, this problem is usually linked to poor quality remanufacturers.

Leaking AC Compressor Shaft Seal

Another AC clutch failure that can be attributed to a system problem is a failed bearing due to impingement by compressor oil. This may occur if the seal on the compressor shaft leaks compressor oil, and finds it way into the clutch bearing. This oil can contaminate the bearing grease, causing it to be less effective, and also lead to grease purging through the bearing seals. The result is a gritty or failed bearing. Remember that an excessive heat condition in the system can also cause a shaft seal failure.

Mis-Machined AC Compressor Mounting Boss

If there is a dimensional problem with the mounting bosses used for attaching the field coil assembly to the compressor, an interface condition may be created between the field coil and rotor assembly. This problem is usually associated with poor quality remanufactured compressors.