What is the acceptable range for the Air Governor Cutout pressure?

The acceptable range for the Air Governor Cutout pressure is crucial for the operation of a vehicle's air brake system. The air governor is responsible for maintaining the system's air pressure within a certain range to ensure efficient brake function and to prevent damage to the air compressor and other components.

The correct choice indicates that the cutout pressure should fall between 120 to 140 PSI. This range is designed to ensure that the air compressor stops pumping air at a safe and effective pressure level, allowing for proper function of the brakes when needed. If the pressure were too low, there could be a risk of insufficient brake performance, while too high a pressure could lead to system failure or excessive wear on parts.

Understanding the specific pressure range is essential for drivers and maintenance personnel. Being familiar with these specifications helps to ensure safety on the road by maintaining the reliability of the air brake system.