no air to trailer.

Discussion in 'Freightliner Forum' started by macgyver1267, Nov 21, 2013.

  1. macgyver1267

    macgyver1267 Bobtail Member

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    Sep 29, 2012
    0
    When pushing trailer dash valve in it has pressure on it and pops back up. Any ideas?
     
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  3. G/MAN

    G/MAN Road Train Member

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    How much air pressure do you have before pushing in the valve? If there is not enough air pressure the valve will continue popping out.
     
  4. macgyver1267

    macgyver1267 Bobtail Member

    20
    0
    Sep 29, 2012
    0
    120 pounds. Bobtailed around a bit and something shook lose. Working ok now.Going to run alcohol thru lines, although it's not freezing. ..
     
  5. jason6541

    jason6541 Road Train Member

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    Omaha, NE
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    could be a mv3 valve ( parking brake valve) or tractor protection valve going bad.
     
    Skunk_Truck_2590 Thanks this.
  6. kitCat

    kitCat Light Load Member

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    Oct 13, 2013
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    You prolly pissed off someone and they put a quarter or something between your gladhands.
     
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