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Air pressure mismatch

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On my Superliner, the rear air system always has 5-10lbs more pressure than the front (green needle always higher)...through various tests, I believe the gauge is accurate. This truck has a lot more complicated system than the B and I do not fully understand all of it...

Is this a problem that can be tracked to one of the check valves or something between the systems? Some other valve that is hung up or something?



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A 5-10 psi pressure difference in the primary and secondary systems is pretty common and nothing to worry about. I have a 2011 service truck that has more variance than my 85 its just one of those things. I would guess it was a check valve issue but I have never been successful in fixing this issue and I've tried more than once.

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  • 4 weeks later...

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