What should the leakage rate be for combination vehicles in one minute?

For combination vehicles, the standard leakage rate in one minute should be less than 3 psi. This specification is important for ensuring the air brake system is functioning properly and is vital for driver safety. A leakage rate exceeding this limit could indicate issues within the air brake system, potentially leading to brake failure or decreased braking efficiency.

Maintaining a leakage rate below 3 psi helps ensure that the air pressure can be adequately maintained, allowing for reliable brake operation. Regular checks of the leakage rate are critical for drivers to ensure their vehicles are safe to operate, as excessive leakage could compromise the effectiveness of braking and result in hazardous driving conditions.