Park Exhaust valve air leak

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Daycabinit, Dec 5, 2023.

  1. Daycabinit

    Daycabinit Light Load Member

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    Dec 11, 2016
    0
    Park valve exhaust on firewall leaks only when trailer brake knob is pulled ?
     

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  3. BoxCarKidd

    BoxCarKidd Road Train Member

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    Aug 26, 2014
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    If you then remove the emergency glad hand from the trailer is air coming out of the trailer glad hand?
     
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