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Help on leaking ad-sp air dryer.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by 379wheathauler, Dec 22, 2011.

  1. Dec 22, 2011 #1
    379wheathauler

    379wheathauler Bobtail Member

    30
    4
    Sep 5, 2011
    Montana
    0
    I have a ad-sp air dryer that the purge valve was leaking,so installed a new one and still leaks only when engine running. Someone told me put a new governor on so I did and still leaks. I installed a new air dryer and the purge valve leaked, so I put a new purge valve in it also and it still leaks. It starts to leak right after it purges. When you shut the engine off it slowly stops.
     
    379wheathauler, Dec 22, 2011
    379wheathauler, Dec 22, 2011
    #1
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  3. Dec 22, 2011 #2
    Infrared61ranger

    Infrared61ranger Light Load Member

    149
    36
    Dec 15, 2011
    killeen,tx
    0
    you confused the hell out of me you did everything i would have done. did you clean the surface before you replaced the valve and did you add a gasket and are the screws stripped or anything
     
    Infrared61ranger, Dec 22, 2011
    Infrared61ranger, Dec 22, 2011
    #2
  4. Dec 22, 2011 #3
    Oscar the KW

    Oscar the KW Going Tarpless

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    What pressure does it build up to before it purge's?
     
    Oscar the KW, Dec 22, 2011
    Oscar the KW, Dec 22, 2011
    #3
  5. Dec 22, 2011 #4
    bender

    bender Road Train Member

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    Jul 20, 2010
    Don't Kid Yourself
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    The unloader valve orings in the air compressor are passing air. Install an unloader kit.
     
    bender, Dec 22, 2011
    bender, Dec 22, 2011
    #4
  7. Dec 22, 2011 #5
    379wheathauler

    379wheathauler Bobtail Member

    30
    4
    Sep 5, 2011
    Montana
    0
    pressure build to 130 orange needle stays white needle drops.
    I put a unloader kit in it.
    Maybe I need a new compressor.
     
    379wheathauler, Dec 22, 2011
    379wheathauler, Dec 22, 2011
    #5
  8. Dec 23, 2011 #6
    bender

    bender Road Train Member

    2,105
    1,352
    Jul 20, 2010
    Don't Kid Yourself
    0
    OK then, remove the signal line from the air dryer and plug it. Run the compressor through a couple cycles and see what changes.
     
    bender, Dec 23, 2011
    bender, Dec 23, 2011
    #6
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