Page 1 of 2 12 LastLast
Results 1 to 10 of 12
  1. #1
    New Member
    Join Date
    Mar 2011
    Posts
    6
    Tractor
    Kubota L2900

    Default 3PH lifting arms not working

    Hello,

    I recently purchased a 94 L2900. I am a tractor noobie but am mechanically inclined. Hydraulics are a bit of a new thing for me but I get the basics.

    So I went to try the 3pt hitch and the arms are "free floating." I can move them up and down with my hands. Position control does nothing. When I move the arms they are together and move with a small resistance and also make a couple light clunks.

    Seems to me by looking into the oil fill port with a inspection camera that there are no fragments anywhere. So my first suspicion is that I have no pressure. My goal is to try to eliminate the external / easy stuff before tearing into it. I studied the parts and I think I figured out that the hydraulic supply comes to the lifting arm section via a hard steel line from under the right side of the machine. That block also supplies the FEL and backhoe. The line goes up under the seat into a block where the lowering speed control knob is.

    How can I figure out if pressure is getting up there? Is it reasonable that the large-ish (16 or 17mm socket) plug on the right of the inlet tube should weep oil if the tractor is on?

    FYI the loader and backhoe work OK, although the fluid might be a little low.

    Any other thoughts?

    Thanks.

  2. #2
    Super Member grsthegreat's Avatar
    Join Date
    Jan 2011
    Posts
    6,447
    Location
    north idaho
    Tractor
    dk45se hst cab

    Default Re: 3PH lifting arms not working

    one quick question, do you have any rear remotes (hydraulic remote ports). the reason I'm asking, is if my tractor remote is set into detent or float position,. it can stop the other hydraulics from working.

    what i had to do with my tractor was to loop a hose between both empty rear ports, so if i accidentally left the lever arm in detent position, i wouldn't deadhead the hydraulic pump.

    that being said, if you dint have any rear remote ports, than I'm sure people here will tell you to get a hydraulic gage and check your pressures.
    currently own
    2011 Kioti DK45SE HST CAB tractor/loader, Jimna 6" - 3 point wood chipper, 60" JD Brush Hog, JD 60" Rototiller, 3 point post hole digger with hydraulic assist, 3 point spring tooth rake, Fimco 55 gallon weed sprayer with 12 foot boom, 3 point hydraulic wood splitter (home built)
    Quick Attach 79" loader mount snowblower & rear powerpack
    Quick Attach 84" Snow Blade
    Quick Attach 42" pallet forks

  3. #3
    New Member
    Join Date
    Mar 2011
    Posts
    6
    Tractor
    Kubota L2900

    Default Re: 3PH lifting arms not working

    I don't believe so. I do have a backhoe but those hoses come from the block under the right foot. The manual mentioned something about rear remote and that system has three control levers behind the 3PH lever. I do not have that option.

  4. #4
    Veteran Member
    Join Date
    Jul 2009
    Posts
    1,729
    Location
    IL
    Tractor
    B2710

    Default Re: 3PH lifting arms not working

    Not familiar with that tractor, but there's usually a valve that controls the speed of the 3pt motion, if it's closed all the way there won't be any motion. Look down around where your heels would be when you're sitting on the tractor, probably something like a plastic or metal wheel a few inches in diameter.
    Kubota B2710, New Holland CM274 front mower, Toro Zmaster ZTR, Ford 908 bush hog, New Idea manure spreader, Swisher trail mower

  5. #5
    New Member
    Join Date
    Mar 2011
    Posts
    6
    Tractor
    Kubota L2900

    Default Re: 3PH lifting arms not working

    Thanks. I have found the speed control and tried moving the arms in many different combinations to no avail.

    I did find another member with a possibly similar problem who posted a while back. One reply on that thread mentioned that the kubota is an "open" system. I also found another (unrelated to 3PH) post where someone said to connect the backhoe pressure and return hoses togtether when the BH is not mounted. I may try that at some point but I want to be sure nothing will blow up. Need to understand more.

  6. #6
    Super Member grsthegreat's Avatar
    Join Date
    Jan 2011
    Posts
    6,447
    Location
    north idaho
    Tractor
    dk45se hst cab

    Default Re: 3PH lifting arms not working

    Quote Originally Posted by eangler View Post
    Thanks. I have found the speed control and tried moving the arms in many different combinations to no avail.

    I did find another member with a possibly similar problem who posted a while back. One reply on that thread mentioned that the kubota is an "open" system. I also found another (unrelated to 3PH) post where someone said to connect the backhoe pressure and return hoses togtether when the BH is not mounted. I may try that at some point but I want to be sure nothing will blow up. Need to understand more.
    on an open system, if the hoses are not connected to an implement, the hydraulic fluids will not be able to work. also, you can damage the hydraulic pumps.
    on my open system, when i disconnect say the log splitter, i put in a loop of hose between the output and return line, or nothing works.
    currently own
    2011 Kioti DK45SE HST CAB tractor/loader, Jimna 6" - 3 point wood chipper, 60" JD Brush Hog, JD 60" Rototiller, 3 point post hole digger with hydraulic assist, 3 point spring tooth rake, Fimco 55 gallon weed sprayer with 12 foot boom, 3 point hydraulic wood splitter (home built)
    Quick Attach 79" loader mount snowblower & rear powerpack
    Quick Attach 84" Snow Blade
    Quick Attach 42" pallet forks

  7. #7
    New Member
    Join Date
    Mar 2011
    Posts
    6
    Tractor
    Kubota L2900

    Default Re: 3PH lifting arms not working

    OK, I must have some combination because the FEL works weather the backhoe is there or not, and when it's not I do not have to loop back the connection. Hmmm. I suppose this would all be documented in the service manual.

  8. #8
    New Member
    Join Date
    Feb 2011
    Posts
    10
    Tractor
    Allis Chalmers WD45

    Default Re: 3PH lifting arms not working

    Check out pages 37 thru 41 of the Operator's Manual. You probably need to turn the Hydraulic Outlet Block Control Screw 90 degrees counterclockwise.

    http://www.kubotabooks.com/AutoIndex...s%20manual.pdf
    Last edited by PADan; 03-14-2011 at 11:41 PM.

  9. #9
    Platinum Member RayCo's Avatar
    Join Date
    Jul 2005
    Posts
    981
    Location
    Chester County, PA
    Tractor
    Kubota BX24

    Default Re: 3PH lifting arms not working

    While I doubt this is the problem, I suppose it can't help to mention it. When I got my first tractor with hydraulics, neither the front nor midpoint hitch would move. After trying to diagnose the hydraulic system without any experience, I stepped back and looked for a simpler solution. It turned out that the dash panel, where the hydraulic levers were, had shifted down over the years, and there simply wasn't enough clearance for the levers to go up all the way. After correcting this, everything worked as expected.
    Ray
    BX24

  10. #10
    New Member
    Join Date
    Mar 2011
    Posts
    6
    Tractor
    Kubota L2900

    Default Re: 3PH lifting arms not working

    [QUOTE=PADan;2298398]Check out pages 37 thru 41 of the Operator's Manual. You probably need to turn the Hydraulic Outlet Block Control Screw 90 degrees counterclockwise.

    Well this did it. Thanks PADan. Turned the valve and the arms worked. The only problem is when I turn this to use the 3PH I can't use the loader. That's a little inconvenient. I will have to study it for a while to see if there is a way to fix it so I can use the loader and the 3 point.

Page 1 of 2 12 LastLast

Similar Threads

  1. 3PH lower arms died
    By patrick_g in forum Owning/Operating
    Replies: 11
    Last Post: 01-01-2010, 11:30 AM
  2. Simultaneous lifting and pulling with 3PH
    By CrazyQ in forum Owning/Operating
    Replies: 8
    Last Post: 01-15-2009, 08:29 PM
  3. Short lifting arms??
    By scheduleplus in forum Owning/Operating
    Replies: 4
    Last Post: 08-28-2008, 11:50 PM
  4. Two lift arm holes on 3ph arms on 4010/4110
    By RalphVa in forum John Deere Owning/Operating
    Replies: 2
    Last Post: 05-27-2008, 01:12 PM
  5. 3ph won't lower without some weight
    By RobT in forum Parts/Repairs
    Replies: 5
    Last Post: 02-15-2007, 12:15 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.