leversole Posted May 6, 2013 Share Posted May 6, 2013 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?ThanksLeslie Quote Link to comment https://www.bigmacktrucks.com/topic/31087-air-pressure-mismatch/ Share on other sites More sharing options...
rsb502 Posted May 8, 2013 Share Posted May 8, 2013 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. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment https://www.bigmacktrucks.com/topic/31087-air-pressure-mismatch/#findComment-182310 Share on other sites More sharing options...
juanlevi Posted May 9, 2013 Share Posted May 9, 2013 (edited) I don't think so it is a problem it is just a normal thing and i have asked my uncle who owns a commercial garage doors somerville nj as he has invigilated many vehicle. Edited May 9, 2013 by juanlevi Quote Link to comment https://www.bigmacktrucks.com/topic/31087-air-pressure-mismatch/#findComment-182512 Share on other sites More sharing options...
felicello122 Posted June 4, 2013 Share Posted June 4, 2013 Pretty common for the air pressure difference in most trucks by at least 5 pounds. Quote Link to comment https://www.bigmacktrucks.com/topic/31087-air-pressure-mismatch/#findComment-186798 Share on other sites More sharing options...
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