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Ive searched the forums....Unloader valve.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by nikmirbre, Jan 21, 2020.

Page 3 of 4
  1. Jan 27, 2020 #21
    nikmirbre

    nikmirbre Road Train Member

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    That was my next question, Im gonna go by Detroit diesel or somewhere and see if they sell a purge valve replacement kit..
     
    nikmirbre, Jan 27, 2020
    nikmirbre, Jan 27, 2020
    #21
    Hulld Thanks this.
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  3. Jan 27, 2020 #22
    Hulld

    Hulld Road Train Member

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    I think truck part supply houses like Fleet Pride sell the air dryer purge kits also.
    It’s been some years but I believe at one time there were a few YouTube videos on purge valve replacement.
     
    Hulld, Jan 27, 2020
    Hulld, Jan 27, 2020
    #22
    nikmirbre Thanks this.
  4. Jan 27, 2020 #23
    nikmirbre

    nikmirbre Road Train Member

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    87F8C039-924F-4C64-858A-B5AEF737D4DD.jpeg 87F8C039-924F-4C64-858A-B5AEF737D4DD.jpeg 60C37B13-2E0E-4BD7-910F-CA5BE2AB1499.jpeg EE4C58DD-866F-4091-9533-0F5393F13F99.jpeg image.jpg
     
    nikmirbre, Jan 27, 2020
    nikmirbre, Jan 27, 2020
    #23
  5. Jan 27, 2020 #24
    nikmirbre

    nikmirbre Road Train Member

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    Ok 1st 2 pics is before I touched anything.

    3rd is after removing the spring being held by those 4 bolts.

    Last picture is new purge valve....

    does that bolt in the middle come off? It seems to just turn and turn
     
    nikmirbre, Jan 27, 2020
    nikmirbre, Jan 27, 2020
    #24
  7. Jan 27, 2020 #25
    nikmirbre

    nikmirbre Road Train Member

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    Well I did change the governor and ive been sitting here idling for the past 30 minutes and now its not doing it. I thought the symptoms of a bad governor was that I wouldn't be able to build air?
     
    nikmirbre, Jan 27, 2020
    nikmirbre, Jan 27, 2020
    #25
  8. Jan 27, 2020 #26
    nikmirbre

    nikmirbre Road Train Member

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    In answer to my question in post number 24, it looks like that black top of the dryer needs to come off in order for that bolt on the bottom to be removed?
     
    nikmirbre, Jan 27, 2020
    nikmirbre, Jan 27, 2020
    #26
  9. Jan 27, 2020 #27
    Hulld

    Hulld Road Train Member

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    You have to pull the snap ring out to allow the valve to come out.
     
    Hulld, Jan 27, 2020
    Hulld, Jan 27, 2020
    #27
    nikmirbre Thanks this.
  10. Jan 27, 2020 #28
    Hulld

    Hulld Road Train Member

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    FF4B1970-8F44-455A-9343-F1CDBC6D6D2B.jpeg
     
    Hulld, Jan 27, 2020
    Hulld, Jan 27, 2020
    #28
    jsnell and nikmirbre Thank this.
  11. Mar 14, 2020 #29
    nikmirbre

    nikmirbre Road Train Member

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    Im just getting around to changing the unloaded valves. Just to be sure I’m gonna do it right, I’m gonna change both valves. I drain all the air from the system first? Do I need to disconnect the batteries?
     
    nikmirbre, Mar 14, 2020
    nikmirbre, Mar 14, 2020
    #29
    Hulld Thanks this.
  12. Mar 14, 2020 #30
    Hulld

    Hulld Road Train Member

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    Not a bad idea to drain the air off.
    Should not need to disconnect batteries unless you have some sort of electrical cables that need to be disturbed in the area you are working.
     
    Hulld, Mar 14, 2020
    Hulld, Mar 14, 2020
    #30
    nikmirbre and 062 Thank this.
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