417 Tractor Trailer Repair
Truck and Trailer Repair in Joplin, Missouri (417) 499-7353
Air leak down test

Air leak down test

Published by 417 Tractor Trailer Repair on

With the fully charged air system typically 125psi. With the wheels chocked, shut truck off release tractor brakes.  After the in air pressure stabolizes make sure the truck does not lose more the 3 psi in one minute. Then press and hold brake pedal for a minute it should not lose more then 4psi.