ABS valve leaking air

Discussion in 'Experienced Truckers' Advice' started by OldeSkool, Jan 17, 2020.

  1. OldeSkool

    OldeSkool Medium Load Member

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  3. OldeSkool

    OldeSkool Medium Load Member

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    So this valve, I assume the ABS valve, is leaking air out the exhaust hole (I'm pointing at) it only does it when the red trailer brake knob is pushed in.

    I have clamped all the brake pod air lines truck and trailer and made no difference. Would you replace this valve?
     
  4. xsetra

    xsetra Road Train Member

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    Not enough information to reply properly. I have replaced my ABS valve on tractor that was leaking out of the exhaust port.

    First disconnect the trailer and check if that valve stops leaking.
    Where is that valve located. Tractor or trailer?
     
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  5. flybynight12

    flybynight12 Medium Load Member

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    Flex seal it
     
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  6. kylefitzy

    kylefitzy Road Train Member

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    Pull the service line off the trailer and push in the red knob. I bet you will find air leaking out of the service gladhand. The hole your pointing at looks like a check valve, the exhaust for that valve is on the bottom. That looks like the tractor protection valve to me, not an ABS valve, there is not electrical wires going to it.
     
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  7. OldeSkool

    OldeSkool Medium Load Member

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    Its on the tractor on the left side frame rail about midway under the sleeper.
     
  8. OldeSkool

    OldeSkool Medium Load Member

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    Actually there is a black wire on the very bottom that made me think ABS, however you are right it is actually 2 separate valves there looks like. The one leaking has no wire going to it. Thanks all of you for the ideas!!!
     
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  9. mhyn

    mhyn Road Train Member

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    the name is protection valve not ABS. $250 value, 1 hour to change it....
     
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