During an air pressure governor test, what should be done if the governor cut-in pressure is below 80 p.s.i.?

When conducting an air pressure governor test, it is essential to ensure that the governor cut-in pressure meets the required standards. A governor cut-in pressure below the specified threshold of 80 p.s.i. indicates a potential issue with the vehicle’s air system, which could compromise braking and other essential functionalities that rely on adequate air pressure.

Rejecting the vehicle in this context is necessary because a cut-in pressure below the acceptable level indicates that the air supply may not be sufficient for safe operation. This failure can result in inadequate braking performance, increasing the risk of accidents. Therefore, vehicles that do not meet this critical safety standard should not be deemed roadworthy until the necessary repairs have been made and the vehicle can consistently achieve the correct air pressure levels. This decision aligns with safety protocols and ensures the welfare of all road users.