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  1. #1
    New Member
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    Sep 2011
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    6
    Tractor
    Agco ST30X

    Default Agco ST30X 3 point hitch bleeding down

    My Agco ST30X (with loader) is bleeding down on the 3 point hitch. The loader is not bleeding down but does not lift with the power that it use to. If i lock down the decent control knob under the seat, I can hold the hitch in place.

    Someone told me to rebuild the pump but I dont even know where the pump would be... Any suggestions?

  2. #2
    Super Star Member J_J's Avatar
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    Sep 2003
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    18,541
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    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: Agco ST30X 3 point hitch bleeding down

    Don't mess with the pump until you check out all the other possibilities

    You need to check the tractor pressure at the IN port using a tee, or just plug in a 3000 psi hyd pressure gage into one of the QD's, and move the levers for the lift or tilt. It should show tractor relief pressure.

    If the hyd gage is installed at the tee to the IN port, then you can move any lever and test the hyd throughout the tractor. Pull the 3pt lever to raise and the valve should relieve, and you can read the pressure. If you have low pressure at the 3pt, there would be several causes. Piston seals worn, relief valve has debris in it, 3pt valve leaking or worn spools.

    The descent knob is used to set the descent rate, or close off the fluid from the cyl, and holding the attachment in place
    J.J.

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

    Git er done.

  3. #3
    New Member
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    Sep 2011
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    6
    Tractor
    Agco ST30X

    Default Re: Agco ST30X 3 point hitch bleeding down

    QD's?

  4. #4
    Member
    Join Date
    Nov 2010
    Posts
    32
    Tractor
    Hydro 1600 Eliminator

    Default Re: Agco ST30X 3 point hitch bleeding down

    Quick disconnects I believe

  5. #5
    New Member
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    Sep 2011
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    Agco ST30X

    Default Re: Agco ST30X 3 point hitch bleeding down

    Ah, most probably

  6. #6
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
    Posts
    18,541
    Location
    JACKSONVILLE, FL
    Tractor
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: Agco ST30X 3 point hitch bleeding down

    Sorry, I just assumed that most everyone was familiar with the QD's as being Quick Disconnects.

    Anyway, if you make up a hyd test set with a 3000 psi hyd gage, and put a QD on it, you can just plug it in real quick and check things. Like this.

    You can permanent mount a hyd gage in the IN port to the FEL valve, and monitor the hydraulics.
    Attached Thumbnails Attached Thumbnails -hyd-gage-qd-jpg  
    Attached Images Attached Images
    J.J.

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

    Git er done.

  7. #7
    New Member
    Join Date
    Sep 2011
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    6
    Tractor
    Agco ST30X

    Default Re: Agco ST30X 3 point hitch bleeding down

    I will have to get one, thanks jj

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