Air leak behind daah

Discussion in 'Mack Forum' started by mack666, Mar 23, 2019.

  1. mack666

    mack666 Bobtail Member

    1
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    Mar 23, 2019
    0
    I have a 95 Mack ch
    Air leaks behind dash until air pressure drops to 60 pounds then it stops leaking.
    I’ve removed all front panels on dash but can’t feel where the air is coming from.
    Also not on the fire wall.
    Any ideas?
     
  2. Razorwyr

    Razorwyr Road Train Member

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    2,354
    Jul 27, 2010
    Meridian, Mississippi
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    Sounds like it's in the brake system. Hits 60 psi and brakes lock the springs, cutting off the air flow to the brakes so it stops leaking.
     
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