What should the air governor cutout pressure be during an inspection?

During a pre-trip inspection of a vehicle's air brake system, the air governor cutout pressure is a critical parameter to monitor. The air governor is responsible for automatically controlling the pressure in the air tanks of the braking system. Ideally, during a proper inspection, the cutout pressure should be in the range of 120 to 140 PSI.

This range is significant because it ensures that the air pressure is sufficient for the braking system to function efficiently, while also preventing excessive pressure that could lead to overfilling the air tanks. Having the cutout pressure set appropriately within this range helps maintain the integrity and reliability of the braking system, ensuring safety while driving.

Additionally, if the cutout pressure is too low, it could result in inadequate braking performance, while a higher cutout pressure could indicate potential issues with the governor or other system components. Therefore, knowing that the correct air governor cutout pressure is between 120 and 140 PSI is essential for the safety and reliability of vehicles equipped with air brake systems.