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dd 14 wont build air past 60 psi

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by o1reb, Feb 18, 2021.

  1. Feb 18, 2021 #1
    o1reb

    o1reb Bobtail Member

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    Apr 28, 2012
    bedford
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    new compressor no air past 65 psi new air cartridge no leaks in system tanks hold air from shop fill 09 dd14 freightliner
     
    o1reb, Feb 18, 2021
    o1reb, Feb 18, 2021
    #1
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  3. Feb 18, 2021 #2
    Mike250rs

    Mike250rs Heavy Load Member

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    Sep 24, 2019
    Raleigh, NC
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    I'm assuming you have check the air governor.

    When was the last time the air tanks were drained?
     
    Mike250rs, Feb 18, 2021
    Mike250rs, Feb 18, 2021
    #2
  4. Feb 18, 2021 #3
    uncleal13

    uncleal13 Road Train Member

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    Apr 9, 2009
    Humboldt, Sk
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    After the air dryer, the air goes to the front half of the wet tank. There is a bulkhead inside to separate the back half of the air tank. There is a check valve in there that can fail. After that, the air goes to the primary and secondary tanks.
    Also as mentioned, the governor maybe the problem.
     
    uncleal13, Feb 18, 2021
    uncleal13, Feb 18, 2021
    #3
    o1reb Thanks this.
  5. Feb 19, 2021 #4
    o1reb

    o1reb Bobtail Member

    46
    21
    Apr 28, 2012
    bedford
    0
     
    o1reb, Feb 19, 2021
    o1reb, Feb 19, 2021
    #4
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