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Losing pressure 2nd tank (Prostar 2010)

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by niksafree, Mar 7, 2019.

  1. Mar 7, 2019 #1
    niksafree

    niksafree Bobtail Member

    11
    8
    Mar 24, 2018
    0
    Hello,
    I am going to post a video of the problem.
    The pressure is at 125. Pressing and holding the brake for a few seconds.
    Pressure is now let's say near 110.
    If I press the break again and when it falls bellow 100 then it's starting to lose air. 2nd tank falls to 30, and primary falls at 90.
    You can hear loud air coming around foot brake valve. ( We did put a new one, but the problem is still there). I tried removing Abs duse, to check if it's electrical problem, but it's not.

     

    Attached Files:

    niksafree, Mar 7, 2019
    niksafree, Mar 7, 2019
    #1
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  3. Mar 7, 2019 #2
    Ridgeline

    Ridgeline Road Train Member

    22,633
    120,540
    Dec 18, 2011
    Michigan
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    Take it to a dealer, let them deal with the leak. It is far too easy to mess something up.
     
    Ridgeline, Mar 7, 2019
    Ridgeline, Mar 7, 2019
    #2
  4. Mar 7, 2019 #3
    niksafree

    niksafree Bobtail Member

    11
    8
    Mar 24, 2018
    0
    We have changed the dash valve.
    The problem is fixed.
     
    niksafree, Mar 7, 2019
    niksafree, Mar 7, 2019
    #3
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