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  1. #1
    Member
    Join Date
    May 2012
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    37
    Location
    N.E. Wisconsin
    Tractor
    Massey 1533

    Default QD "checking" ?

    I have a 3/8 Quick disconnect fitting that seems to flow in one direction but "checks" in the opposite. Its an ISO 5675 Agricultural QD with a ball. Did I get stung by a POS china QD or what? The QD connects a grapple cylinder to loader circuit via solenoid valve that separates bucket curl. The other hose QD seems to work fine.

  2. #2
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
    Posts
    16,424
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: QD "checking" ?

    Take the QD apart and see if the o-ring and spring are OK.

    If bad, replace the parts or get a new half.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  3. #3
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
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    4,268
    Location
    Coyote Flats,Tx
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: QD "checking" ?

    I'd suggest to try a different male tip to see if checking stopped.

  4. #4
    Member
    Join Date
    May 2012
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    37
    Location
    N.E. Wisconsin
    Tractor
    Massey 1533

    Default Re: QD "checking" ?

    Thanks guys, I'll try both suggestions. Have you ever run into this before? It's troublesome because the cylinder has extended all the way and locked with the pressure and no way to relieve it but cracking the other plugged port on the cyclinder.

  5. #5
    Veteran Member
    Join Date
    Jan 2010
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    2,497
    Location
    Northern, IL
    Tractor
    Branson 2400H

    Default Re: QD "checking" ?

    Yes this does happen on occasion. Sometimes you get them to work at low flow or by feathering the control valve. Make sure halves on the QD of the same type or style. I.e. poppet or ball. I have experienced more failures when using one half that is ball style and one half that is poppet style. They will connect together so this can also add to the confusion.
    Artificial Intelligence will never overcome natural stupidity.

    Branson 2400H MMM & FEL

    JD 112

    BX1850 gone but not forgotten

  6. #6
    Super Member
    Join Date
    Mar 2008
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    9,870
    Location
    Northern Fingerlakes region of NY, USA
    Tractor
    Kubota L3830GST, B7500HST, BX2660

    Default Re: QD "checking" ?

    Quote Originally Posted by Bogi View Post
    Thanks guys, I'll try both suggestions. Have you ever run into this before? It's troublesome because the cylinder has extended all the way and locked with the pressure and no way to relieve it but cracking the other plugged port on the cyclinder.
    Yep. I have a set (bought 2 male/female pairs) where the male side acts as a check.

    Aaron Z
    A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
    Robert Heinlein, Time Enough for Love

  7. #7
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
    Posts
    16,424
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: QD "checking" ?

    If those QD's have a mil-spec number, they should all be made to manufacturer specs and interchange with each other.
    J.J.

    When I works, I works hard. When I sits and thinks, I goes to sleep.

    Git er done.

  8. #8
    Member
    Join Date
    May 2012
    Posts
    37
    Location
    N.E. Wisconsin
    Tractor
    Massey 1533

    Default Re: QD "checking" ?

    Update. It was the male best I can figure. Took them both apart and it seemed that the spring in the male was kinda wonky, made the ball roll off to the side when pressed in. I have it back together and working good. Thanks again for all your input... I like this place.

  9. #9

    Default Re: QD "checking" ?

    I had this happen once. Turned out I had blown a cheap QA apart internally, a piece cut the inner hose liner, which then folded on itself and blocked the flow in one direction. Took a little bit to figure that one out.

    ISZ

  10. #10
    New Member
    Join Date
    Feb 2013
    Posts
    2
    Location
    U.P. Michigan
    Tractor
    Oliver 1655

    Default Re: QD "checking" ?

    Quote Originally Posted by oldnslo View Post
    Yes this does happen on occasion. Sometimes you get them to work at low flow or by feathering the control valve. Make sure halves on the QD of the same type or style. I.e. poppet or ball. I have experienced more failures when using one half that is ball style and one half that is poppet style. They will connect together so this can also add to the confusion.
    When you say they will connect together: Do they do so easy or hard or varies all over the place? I am working on a Oliver 1655 diesel and one of the QD can be a really pain (2 people and 15 min of messing) some times both connecting and disconnecting and other times it works fine. I'm thinking it is dirty or mismatched some how.... I'll have to look in side the female parts--- I assume they look different inside right? Are there any other reasons for this some times working? Thanks, Edward

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