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  1. #1
    New Member
    Join Date
    May 2013
    Posts
    1
    Location
    Independence, OR
    Tractor
    John Deere 820

    Default John Deere 820 3 pt. won't raise

    I have a 1969 JD 3 cylinder diesel, built in Germany. I have rebuilt the 3 pt. hydraulics and rockshaft. I didn't change any of the settings when I did the rebuild. I can't get the arms to fully raise up. They lift about 1/3rd of the way up and stop. I have connected a gauge to the port ahead of the pilot tube and only get a brief shot of pressure up to about 500 psi and then it drops back to zero. Any help would be appreciated.

    Thanks,
    Charles


  2. #2
    Bronze Member
    Join Date
    Oct 2012
    Posts
    77
    Location
    Windham
    Tractor
    John Deere 70

    Default Re: John Deere 820 3 pt. won't raise

    First thought would be fluid level,on the 2 cylinder tractors the two adjustments control raise and lower speed.Of course there is a bypass the hydraulics has to be deadheaded to get that reading.

  3. #3
    Elite Member Tx Jim's Avatar
    Join Date
    Jan 2007
    Posts
    4,388
    Location
    Coyote Flats,Tx
    Tractor
    JD 4255/Kubota M7040 HDC

    Default Re: John Deere 820 3 pt. won't raise

    Where/what is the object you are calling a pilot tube? Where is L/D lever under seat setting(L-LD-D)? Lever should be setting in "D". Did you get the cam(parts key #9) back in correct place in RS valve control linkage? Also is spring(parts key #10) intact and attached correctly? It's possible that the L/D control mechanism needs to be adjusted following adjustments outlined in JD tech manual.
    Attached Thumbnails Attached Thumbnails -l50399_________un01jan94-gif  

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