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  1. #1
    New Member
    Join Date
    May 2011
    Kubote B3030

    Default JD pressure relieve valve

    Hi all

    I have a JD 5045 and the book does not show how to set the PRV up higher-use this tractor to pull small log trailer with picker,thanks Albert

  2. #2
    Super Star Member J_J's Avatar
    Join Date
    Sep 2003
    Power-Trac 1445, KUBOTA B-9200HST

    Default Re: JD pressure relieve valve

    In general, a relief valve is set by turning a screw, or adding shims.

    To raise pressure, a thicker shim is required, and if screw type, tighten the screw more will increase pressure relief.

    You should know the max pump pressure and valve rated pressure.

    Have a hyd test set available, and plug in to one of the QD's, and push the lever to pressurize the QD/gage momentarily.

    Some people adjust the pressure to about 50 to 100 psi below the pumps max pressure.

    This increase in pressure may allow you to lift a greater load, and you might need some more ballast on the back.
    Attached Thumbnails Attached Thumbnails -3000-psi-hyd-test-gage   -3000-psi-hyd-test-gage  

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

    Git er done.

  3. #3
    New Member
    Join Date
    May 2011
    Kubote B3030

    Default Re: JD pressure relieve valve

    Thanks J_J

    My problem is,i can`t find the PRV,they got it hit somewhere and i need to bump it up higher than the PRV on the log trailer...

  4. #4
    Super Member Tx Jim's Avatar
    Join Date
    Jan 2007
    Coyote Flats,Tx
    JD 4255/Kubota M7040 HDC

    Default Re: JD pressure relieve valve

    I was only able to locate 1 PRV(parts key #30) in the parts catalog and it appears to be non-adjustable.
    Attached Thumbnails Attached Thumbnails -0001019511____________a1-gif  

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