What is the most common leakage point in a belt-driven non-hermetic compressor that has been unused for some time?

The most common leakage point in a belt-driven non-hermetic compressor that has been unused for some time is the rotating shaft seal. This seal is designed to prevent refrigerant from leaking out where the motor shaft exits the compressor housing. Over time, especially in compressors that have not been operated for a while, seals can dry out and become brittle. This degradation can lead to leaks when the system is started back up.

Maintaining proper sealing in the rotating shaft area is crucial because any failure here can significantly impact the performance of the compressor and the overall efficiency of the refrigeration system. Unlike other components, the shaft seal is subjected to wear and environmental factors, making it a critical point to inspect in an older or unused compressor.