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Purge valve cycling between 125-120 psi every few seconds

Discussion in 'Volvo Forum' started by bravoo67, Nov 20, 2014.

Page 1 of 2
  1. Nov 20, 2014 #1
    bravoo67

    bravoo67 Light Load Member

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    Mar 15, 2012
    Brooklyn NY
    0
    Hello

    I have 2002 Volvo with Cummins ISX

    My air dryer Bendix AD-9 started to cycle every 10-15 seconds

    it purges at 125 psi , purge valve slowly leaks to 120 psi (can hear it and also can see it on gauges) and then cycles again :biggrin_2557:

    Changed the governor so far but it didnt help :biggrin_25513:


    Any clues what could it be ?

    Any info will be greatly appreciated :biggrin_255::biggrin_25514:
     
    bravoo67, Nov 20, 2014
    bravoo67, Nov 20, 2014
    #1
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  3. Nov 20, 2014 #2
    icsheeple

    icsheeple Trailing the Herd

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    I'd bypass until you get the dryer replaced. Bad spitter valve on dryer. The cold weather made it worse. You might have other air leaks too. Just bypass the som beach so your truck stop neighbors can get some shut eye.
     
    icsheeple, Nov 20, 2014
    icsheeple, Nov 20, 2014
    #2
    bravoo67 Thanks this.
  4. Nov 20, 2014 #3
    bravoo67

    bravoo67 Light Load Member

    252
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    Mar 15, 2012
    Brooklyn NY
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    Should I change the dryer or just the valve ?


    Will look in to bypassing it !
     
    bravoo67, Nov 20, 2014
    bravoo67, Nov 20, 2014
    #3
  5. Nov 20, 2014 #4
    generallee

    generallee Medium Load Member

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    Jan 4, 2014
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    Replace the purge valve and replace the cartridge in the dryer. Should be done every fall anyway. The dryer that is.
     
    generallee, Nov 20, 2014
    generallee, Nov 20, 2014
    #4
    bravoo67 Thanks this.
  7. Nov 20, 2014 #5
    icsheeple

    icsheeple Trailing the Herd

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    Kansas City, KS
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    Dryers are cheap, just replace with a reman and swap for the core.
     
    icsheeple, Nov 20, 2014
    icsheeple, Nov 20, 2014
    #5
    bravoo67 Thanks this.
  8. Nov 20, 2014 #6
    Black_Ice

    Black_Ice Bobtail Member

    10
    1
    Feb 28, 2009
    North
    0
    leaking unloader valves in the compressor will do it also ..
     
    Black_Ice, Nov 20, 2014
    Black_Ice, Nov 20, 2014
    #6
    bravoo67 Thanks this.
  9. Nov 20, 2014 #7
    skateboardman

    skateboardman Road Train Member

    6,232
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    Jan 14, 2012
    flatbed heaven
    0
    I would replace the entire dryer.
     
    skateboardman, Nov 20, 2014
    skateboardman, Nov 20, 2014
    #7
  10. Nov 21, 2014 #8
    4x4_Welder

    4x4_Welder Medium Load Member

    300
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    Sep 16, 2014
    Eastern Orygun
    0
    It could be worse, I had a Peterbilt here that would fart for five minutes after shutdown. Literally it sounded like someone easing out a bunch of squeakers, replaced the purge valve and all was good.
    When was the last time you changed the desiccant canister?
     
    4x4_Welder, Nov 21, 2014
    4x4_Welder, Nov 21, 2014
    #8
    bravoo67 Thanks this.
  11. Nov 21, 2014 #9
    bravoo67

    bravoo67 Light Load Member

    252
    34
    Mar 15, 2012
    Brooklyn NY
    0
    Hello

    The problem is solved!!

    Turned out it needed bottle or two of BRAKES ANTIFREEZE FLUID..

    Everything is back to normal

    Thank you all for the effort!!

    I
     
    bravoo67, Nov 21, 2014
    bravoo67, Nov 21, 2014
    #9
  12. Nov 21, 2014 #10
    icsheeple

    icsheeple Trailing the Herd

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    Nov 1, 2013
    Kansas City, KS
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    LOL, gotta love the simple solutions. Reminds me of the guy that rebuild his motor then realized he forgot to put fuel in it.
     
    icsheeple, Nov 21, 2014
    icsheeple, Nov 21, 2014
    #10
    Big Don Thanks this.
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