For the air governor cut out test, the governor should cut out at what pressure range?

The air governor cut-out test is crucial in ensuring the air braking system operates effectively and safely. The air governor is designed to control the air pressure within the system, managing when the compressor will engage or disengage to maintain the appropriate pressure levels.

The correct pressure range for the air governor to cut out is typically between 120 to 140 psi. This range is standard for many commercial vehicles to ensure that the air braking system has adequate pressure available for operation without exceeding the safe limits that could result in system failures or inefficiencies. When the air governor reaches this designated pressure threshold, it stops the compressor from building any more pressure, preventing possible damage from over-pressurization.

Understanding this specific pressure range is essential for the pre-trip inspection and maintenance of the vehicle, as it ensures that the air brake system will function properly and respond effectively during operation. Awareness of the correct cut-out pressure helps in assessing whether the air compressor and governor are functioning correctly, which is vital for safe vehicle operation.