Peterbilt Brake Valve Replacement/Leak

Discussion in 'Peterbilt Forum' started by grainhauler, Mar 16, 2012.

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  1. Feb 1, 2017 #12
    Miket41

    Miket41 Bobtail Member

    1
    0
    Feb 1, 2017
    0
    Workin on a 2001 Pete 378 when I push buttons in leaks air out center exaust port on abs relay valve rear axle anyone know what could cause that ?
     
    Miket41, Feb 1, 2017
    Miket41, Feb 1, 2017
    #12
  2. Feb 1, 2017 #12
    AModelCat

    AModelCat Road Train Member

    29,703
    164,822
    Jul 7, 2015
    Canuckistan
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    Likely a failed brake chamber. Chock your wheels on level ground, release brakes. Try and pinch off the SERVICE lines to each chamber, one at a time. If you pinch off a line and it stops leaking, there's your failed chamber.
     
    AModelCat, Feb 1, 2017
    AModelCat, Feb 1, 2017
    #12
  3. Feb 6, 2018 #13
    Salteedogg

    Salteedogg Bobtail Member

    7
    1
    Jan 18, 2018
    0
    Did you guys figure this out? My brake lights are stuck on, I’m getting pressure at the sensor. I already resealed the bendix under the brake pedal and the 1 about 2 foot behind it.
     
    Salteedogg, Feb 6, 2018
    Salteedogg, Feb 6, 2018
    #13
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