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Truck problems

Discussion in 'Ask An Owner Operator' started by SH42, Sep 19, 2023.

  1. Sep 19, 2023 #1
    SH42

    SH42 Bobtail Member

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    6
    Feb 22, 2011
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    I have a freightliner Columbia, abs is leaking checked all brake chambers by pinching off all lines one at a time still leaking. Only leaks when brakes are released. Any help would be appreciated.
     
    SH42, Sep 19, 2023
    SH42, Sep 19, 2023
    #1 + Quote Reply
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  3. Sep 19, 2023 #2
    Big Road Skateboard

    Big Road Skateboard Road Train Member

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    May 2, 2021
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    Quick release valve under 5th wheel. Pinch off the blue line between QR Valve and ABS valve.

    Release brakes and see what happens. The QR valves often go bad, sending air down the blue line into the ABS valve, causing the ABS valve to leak out the exhaust
     
    Big Road Skateboard, Sep 19, 2023
    Big Road Skateboard, Sep 19, 2023
    #2 + Quote Reply
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