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Air leaks from parking break knobs

Discussion in 'Ask An Owner Operator' started by Ikamob01, Apr 23, 2022.

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  1. Apr 23, 2022 #1
    Ikamob01

    Ikamob01 Medium Load Member

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    If I apply brakes I get an air leaks from the parking knobs. Any idea what this could be.
     
    Ikamob01, Apr 23, 2022
    Ikamob01, Apr 23, 2022
    #1
    Flat Earth Trucker Thanks this.
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  3. Apr 23, 2022 #2
    Mike250rs

    Mike250rs Heavy Load Member

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    Most likely it is a brake chamber.
    Glad hand seals and chaffed air lines are other strong possibilities
     
    Mike250rs, Apr 23, 2022
    Mike250rs, Apr 23, 2022
    #2
    Opendeckin, MOBee and Magoo1968 Thank this.
  4. Apr 23, 2022 #3
    Ikamob01

    Ikamob01 Medium Load Member

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    I'm guessing and praying it should be the seals. Any diagram of the seals?
     
    Ikamob01, Apr 23, 2022
    Ikamob01, Apr 23, 2022
    #3
  5. Apr 23, 2022 #4
    Mike250rs

    Mike250rs Heavy Load Member

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    the rubber things in your glad hands.. they wear out
     
    Mike250rs, Apr 23, 2022
    Mike250rs, Apr 23, 2022
    #4
  7. Apr 23, 2022 #5
    InTooDeep

    InTooDeep Donner party survivor

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    He is talking about the gland hand seals
    RP-3601_l.jpg
     
    InTooDeep, Apr 23, 2022
    InTooDeep, Apr 23, 2022
    #5
  8. Apr 23, 2022 #6
    Ikamob01

    Ikamob01 Medium Load Member

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    So this will cause air leaks coming from the knobs?
     
    Ikamob01, Apr 23, 2022
    Ikamob01, Apr 23, 2022
    #6
  9. Apr 23, 2022 #7
    InTooDeep

    InTooDeep Donner party survivor

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    Oops didn't see this
     
    InTooDeep, Apr 23, 2022
    InTooDeep, Apr 23, 2022
    #7
  10. Apr 23, 2022 #8
    Ikamob01

    Ikamob01 Medium Load Member

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    This only happens at the stop sign.
     
    Ikamob01, Apr 23, 2022
    Ikamob01, Apr 23, 2022
    #8
  11. Apr 23, 2022 #9
    RustyRod

    RustyRod Light Load Member

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    It would sound like is leaking from the knobs but in reality the leak is somewhere else. That's how you know from the cab that you have an air leak, you hear it on the knobs. The chances of knobs leaking are slim lika a 0.01%.
     
    RustyRod, Apr 23, 2022
    RustyRod, Apr 23, 2022
    #9
    Trucker61016 and GYPSY65 Thank this.
  12. Apr 23, 2022 #10
    JonJon78

    JonJon78 Road Train Member

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    A new brake chamber is cheap. Maybe $100-$150 plus maybe 1 hour labor.

    It definitely isn't something you should wait to get fixed either, if the DOT finds the leak for you it's gonna be fixed at the scale as you'll be put out of service and the repair bill will be pricey then.
     
    JonJon78, Apr 23, 2022
    JonJon78, Apr 23, 2022
    #10
    Trucker61016, D.Tibbitt and GYPSY65 Thank this.
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