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  1. #1

    Join Date
    Jan 2002
    Posts
    23
    Location
    Swan Lake, Montana
    Tractor
    JD 4300

    Default hydraulic valve rebuild

    Has anyone out there had any experience rebuilding hydraulic control valves? I've got a leaky valve on a stabilizer cylinder that needs a seal kit. Are there special tricks or techniques to working on one of these? I would like to attempt this myself first before I have to haul it into the dealer and pay them $50+ per hour to work on it. Thanks.

  2. #2
    New Member
    Join Date
    Mar 2013
    Posts
    5
    Location
    Gainesville, Ga.
    Tractor
    Yanmar 550 Trackhoe

    Default Re: hydraulic valve rebuild

    I used to rebuild my own on my Case 580 C. What do you have?

  3. #3
    Elite Member wdchyd's Avatar
    Join Date
    Apr 2010
    Posts
    2,724
    Location
    Hooksett, NH
    Tractor
    Kubota B2320

    Default Re: hydraulic valve rebuild

    If you have a "leaky" valve on a stabilizer cyl......is it leaking externally (dripping on floor) or leaking internally (not holding load/bypassing)

    If it's leaking externally then go for it, carefully strip it down, clean all parts and inspect for pitting on spools (not good), then reseal using clean #2 grease and reassemble carefully

    the problem with trying to "reseal" a valve with wear problems internally is the seals will not cure the bypassing.......the spools are close fitting to the housing bores and are not fixable with just a reseal........best to replace that section of control valve

    Best to mark all hoses and cap them, and remove the valve to do any repairs, don't try it on the machine.....it just makes more work

    And, oh yea, a good pressure wash before you remove it will be a godsend......
    2010 Kubota B2320 FEL & BH65
    If it ain't fixed don't broke it!

    http://www.tractorbynet.com/content/...-month-wdchyd/

  4. #4
    Super Member Tx Jim's Avatar
    Join Date
    Jan 2007
    Posts
    5,171
    Location
    North Texas
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: hydraulic valve rebuild

    Ditto what wdchyd stated as external seals is all that can be replaced. If bypassing internally then complete valve section needs replaced.

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