When testing the air-compressor governor setting, what are you supposed to observe?

When testing the air-compressor governor setting, it is crucial to observe the cut-out and cut-in pressure. The air-compressor governor regulates the air pressure in the air system of a vehicle, such as a truck or bus. The cut-in pressure is the minimum pressure at which the governor will activate the compressor to refill the air tanks, while the cut-out pressure is the maximum pressure at which the governor will stop the compressor to prevent over-pressurization. Monitoring these pressures ensures that the system operates within safe and efficient parameters, which is essential for the proper function of air brakes and other pneumatic systems in heavy vehicles.

Understanding the cut-out and cut-in pressures helps in diagnosing potential issues within the air system, such as leaks or governor malfunctions. Properly set governor limits ensure that the system maintains sufficient air pressure for optimal brake and system performance, keeping safety as the top priority.