Leak Test - Compressor Block Fitting & Shaft Seal

Compressor gas leaks are very often caused by a defective or worn-out shaft seal. A small amount of compressor oil leakage from the shaft seal is normal. Only when a large leak is detected should the compressor be replaced. Oil leakage can at times be detected visually, while gas leak checking will require a gas leak detector.

1. Blow shop air behind and in front of the compressor clutch/pulley for at least 15 seconds.
2. Probe the compressor area. If the detector goes to a solid alarm, a leak has been found.