Freightliner M2 Leaking Air Dash Valve Photo & File Content Updates #782
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Freightliner m2, you will see this application on box trucks or day cabs Rios auto transport llc 7.67k subscribers subscribed Small air leak behind the dash, we found the leak was at the air gauge assembly.
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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 Freightliner m2 air leak, how to check and repair air leaks 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. 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 brake system troubleshooting quality heavy duty parts s own air supply or shop air
Dirt is the greatest caus on fittings, use it sparingly This can also get i ) when installing fittings into a remanufactured valve, do not over tighten or it will crack the casting. If any of the tests in the following procedure fail, refer to general information, meritor wabco pneumatic antilock braking system (abs) of the business class® m2 workshop manual to test individual air brake components and valves Some steps in this operation require the parking brakes to be released.
Straight to the point video of how to fix a common air leak behind fld/classic dash!!
The valve set aren't expensive and easy to do on your own which could save you some bucks on labor I'd say find a used valve set of pull one from a wrecked truck, teflon the fittings, hook the lines back up test for pressure and leaks after its mounted back in place under the dash face. Ive got a 2017 freightliner m2 rollback thats got an air brake dash valve that will not stay in brake release position with the ignition key on If the key is off the button will stay depressed
It has a new dash valve as it was leaking very badly. 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
