air comp issue

Discussion in 'Trucks [ Eighteen Wheelers ]' started by bob1234, May 4, 2013.

  1. May 4, 2013 #1
    bob1234

    bob1234 Light Load Member

    71
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    Nov 10, 2010
    brantford, ont
    0
    I have a guestion not sure what my problem may be when my air compressor is to building air I hear noise CH CH CH CH or like rattle snake noise clicking noise I hope u see what I am talking about offer that noise stops then I will see the air pressure build up on my gauges any idea what that may be air drier was serviced 06 cat acert
     
    bob1234, May 4, 2013
    bob1234, May 4, 2013
    #1
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  3. May 4, 2013 #2
    Heavyd

    Heavyd Road Train Member

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    Sounds like the purge valve in the air dryer is stuck open a bit when the compressor starts to pump again.
     
    Heavyd, May 4, 2013
    Heavyd, May 4, 2013
    #2
  4. May 5, 2013 #3
    bob1234

    bob1234 Light Load Member

    71
    1
    Nov 10, 2010
    brantford, ont
    0
    New purge valve I was told that it could be a unloader valve feeding back to the air dryer
     
    bob1234, May 5, 2013
    bob1234, May 5, 2013
    #3
  5. May 5, 2013 #4
    Heavyd

    Heavyd Road Train Member

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    The purge valve should be closed when the compressor starts to pump again. So if the pressure is starting to build and you hear that noise, I would say the purge valve is leaking. But, if you hear that noise just after the air dryer purges and air compressor is supposed to stop building air,(compressor cutout), then I would say the unloaders aren't working.
     
    Heavyd, May 5, 2013
    Heavyd, May 5, 2013
    #4
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