Leaking air when I press the gas and when I release service brake

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by stylez80Nine, Jul 20, 2024.

  1. stylez80Nine

    stylez80Nine Light Load Member

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    Ok will take a pic of it hopefully u still around. If I disconnect all the lines from the chamber it would have to be that one you think?
     
  2. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Yes. To verify, you can pull the small air line off that runs from the quick release valve to the ABS valve. If you release the brakes, and air leaks out from the QR valve side, the QR valve is bad.

    Very simple to check. Should be the air line goung to the top of the QR valve, usually on a 90* fitting
     
    xsetra Thanks this.
  3. stylez80Nine

    stylez80Nine Light Load Member

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    Will check now thanks.
     
  4. stylez80Nine

    stylez80Nine Light Load Member

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    Is this the one you’d speaking off and to removes those two small line? Again thank you so much for the help.
     

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  5. stylez80Nine

    stylez80Nine Light Load Member

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    I also remove this lines of all the chambers to see if they wet the issue but it still does it.
     
  6. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Take a pic of what lines you've removed if you don't mind
     
  7. stylez80Nine

    stylez80Nine Light Load Member

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    Hey so I disconnected like you said and air is coming in on 1 (photo provided ) and coming of 2 does that mean it’s bad?
     
  8. stylez80Nine

    stylez80Nine Light Load Member

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    Air is coming in on 1 and leaving on 2
     

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  9. stylez80Nine

    stylez80Nine Light Load Member

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    Sorry for all the reply and when I cover 2 with my finger it stop leaking.
     
  10. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Air should not be coming out the top port