Small air leak behind the dash, we found the leak was at the air gauge assembly I thought i had one air leak, as it turned out i had three Most of these are serviceable depending.
Freightliner M2 air leak behind the dash. Easy DIY repair you can do yourself. - YouTube
After tightening that fitting it would still leak at about 10 psi per hr
Then i fiddled with the manual valve on the auto drain assembly which is shown in my pic and was located at the front bottom of the main air tank, and by repeatedly opening it and letting it snap closed i finally got that to seat without leaking.
Air leak under the dash discussion in ' freightliner forum ' started by majk, nov 10, 2013. An air leak when the dash valve is pushed, with air escaping from the abs valve vent, suggests a faulty abs modulator or vent valve Since the leak stops when brakes are applied, check the abs valve’s internal seals and diaphragms for wear or damage Inspect all air chambers and lines for cracks or loose fittings
Replacing the abs valve or servicing its vent mechanism typically resolves the. One of the air lines is leaking right at the dash air gauge where the plastic line goes into the plastic bezel for the gauge I have no idea how that line terminates or if a special fitting is on the end, so i don't want to attempt to drag it out before i know the proper fix If a spring brake is leaking from the the spring brake to the service brake side, that air will travel back up the service line and out the exhaust of the next valve back
Before replacing a valve that has air leaking from.
