International LT air leak

Discussion in 'International Forum' started by Cruiser69, Dec 18, 2022.

  1. Cruiser69

    Cruiser69 Bobtail Member

    Dec 18, 2022
    I’ve changed two internationals LT both 2019, one had ISX, second one Paccar. But both of them have issue with loosing air way too fast while being turned off. If you turn it off and leave it for 15 min at least one of the air gauges will be lower then 60 psi.
    By that I would expect a big air leak, but with both of them I couldn’t find anything. And if you do the break air leak check they were both holding without an issue. Did anyone had something similar?
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  3. silverspur

    silverspur Heavy Load Member

    Sep 26, 2012
    I had an air leak in the left front drive axle brake chamber on mine. Didn't notice it on the push pedal test. It's hard to detect at a truck stop pre trip with all the noise, but the interstate 81 NB weigh station guy in Virginia noticed it, marked it as a violation not a citation, no OOS just told me to get it fixed within 15 days.
  4. runningman0661

    runningman0661 Road Train Member

    Mar 5, 2009
    Clover, South Carolina
    Mine does the same thing, I finally narrowed it down the the cab air bags on the sleeper. It’s on my to do list after the first of the year.
    Last edited: Dec 19, 2022
  5. flood

    flood Road Train Member

    Dec 25, 2010
    Check the "T" fitting inder the cab that controls the dump valve... unless your under the cab and feel for air you can't hear it even with the truck off
  6. ChuckMartel

    ChuckMartel Light Load Member

    Jan 22, 2021
    There’s no Internationals with paccar engines, but sounds like you need a spray bottle with some soap and water and start spraying every fitting you can find.
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