What is a crucial step to take before performing maintenance on an air compressor?

Before performing maintenance on an air compressor, disconnecting the power supply is indeed a crucial step. This action is essential for ensuring the safety of the technician performing the maintenance. By removing the power source, you eliminate the risk of accidental start-up or electrical shock that could occur while the compressor is being serviced. It is a fundamental safety practice that protects the technician and ensures that maintenance tasks can be performed without the fear of sudden movements or operational hazards from the equipment.

While checking oil levels, testing for leaks, and lubricating the motor are important maintenance tasks, they should only be performed after the power supply has been disconnected. This prioritization places safety first, which is critical in any operational environment, especially when dealing with electrical equipment and mechanical systems.