Which component should be checked regularly to ensure safe operation of an air compressor?

Regularly checking oil levels and quality in an air compressor is crucial for its safe operation and longevity. The oil lubricates the moving parts within the compressor, reducing friction and wear. Proper lubrication ensures that components operate efficiently, which is essential for maintaining optimal performance and preventing overheating. The condition of the oil can also indicate the overall health of the compressor; for instance, contaminated or degraded oil may suggest mechanical issues or excessive wear.

In contrast, while fuel levels might be important for fuel-powered compressors, they do not directly pertain to the general operation of all compressor types. Monitoring air temperature is relevant but not as critical as oil maintenance. Similarly, electrical connections are important for safe operation, but they do not factor into the routine operational efficiency of the compressor in the same way that oil levels and quality do.