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Subject: Golden Jubilee hydraulics

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Gary A Ramus    Posted 01-07-2020 at 18:50:29 [URL] [DELETE]        [Reply] [Email]  
  • Golden Jubilee hydraulics
  • I have a GJ that is in great shape, runs excellent and looks good. However my 3 pt system can not pick up weight. If there is around 250# on it, it will slowly lower down. The fluid is the right, hydraulic fluid, and the level is good. We are trying to figure out why. One thought is the high pressure relief valve may be bad. Or the piston rings on the hydraulic piston that lifts it may be bad. Any thoughts??

    Tim Daley(MI)    Posted 01-08-2020 at 05:50:56 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Golden Jubilee hydraulics
  • HiYa Gary-
    Don't guess. The leak test is easy to do and takes about 30 minutes and costs nothing but your time. When the lift won't hold in the UP position, it is most likely the cylinder and piston are worn and thus leaking oil down. A new safety relief valve won't fix that. If oil is a murky brown or whitish color, it is contaminated with water, but not the cause of your leaking. The job requires removal of the top cover and isn't difficult, just time consuming. Get a buddy to help. A new cylinder and piston are in order. The OEM 9N,2N, 8N, and NAA(JUB) all used the cylinder with the three steel rings with a leather wiper until Ford released the newer NAA-530 piston using a rubber O-RING instead of the rings and leather wiper. If you have an original 3-ring piston still, chances are the cylinder walls have become all gouged and scarred and thus the main root cause of the leak. I advise new parts -don't try to hone or rebore cylinder -it's a waste of time. Pulling the top cover is a job you don't want to do twice so do the job right the first time. Worse case would be to pull and rebuild the pump. Drain old oil, replace with new fresh.

    Tim Daley(MI)

    Gary A Ramus    Posted 01-19-2020 at 09:44:28 [URL] [DELETE]        [Reply] [Email]  
  • Re: Golden Jubilee hydraulics
  • Thank you Tim. This tractor is in Michigan also. West Branch. I will check this out with my buddy next time I am up there.

    TheOldHokie    Posted 01-07-2020 at 20:24:36 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Golden Jubilee hydraulics
  • Start with the most obvious candidate - a leaking lift cylinder seal. You can visually inspect by removing the side inspection cover and looking for oil coming from the cylinder. The NAA cylinder uses a single o-ring with backup washer. Cheap and relatively easy to service.


    Gary A Ramus    Posted 01-19-2020 at 09:45:43 [URL] [DELETE]        [Reply] [Email]  
  • Re: Golden Jubilee hydraulics
  • Thank you TOH.

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