What is an indication that the compressor and governor are operating correctly?

The absence of low air pressure warnings is a strong indication that the compressor and governor are functioning correctly. In a properly operating air brake system, the compressor is responsible for maintaining sufficient air pressure in the reservoirs to operate the brakes effectively. The governor controls this pressure, ensuring that it remains within a safe and effective range.

If low air pressure warnings are not present, it suggests that the system is retaining adequate air pressure and that the compressor is able to build and maintain pressure efficiently. This is vital for ensuring that the brake system operates properly, allowing for safe vehicle operation. Therefore, a lack of low air pressure warnings is an important sign confirming the effective operation of both the compressor and governor.