LW-7 BH curl bucket valve problem

Forum › Forums › Tractor Implements › LW-7 BH curl bucket valve problem

Viewing 7 reply threads
  • Author
    Posts
    • June 25, 2011 at 10:51 pm #30342
      thunder1sr
      Participant
        • Offline

        I have an LW-7 BH and have a problem with the valve that controls curl. The bucket will curl closed but will not open up now.
        When I push the control rod left there is very little movement until the
        rod stops. While moving the control rod right there seems to be
        complete movement of the rod but the valve seems to be chattering, without uncurling the bucket.
        Anybody have any Ideas??  Thanks Mike

      • June 26, 2011 at 9:41 am #32642
        Bob Rooks
        Participant
          • Offline

          Hey Mike,

          First thing I would do is to remove the top cover plate of the console and check the valve handle linkage. These are multi-function valve stacks (joy sticks).

          If all appears to be normal then you most likely have debris jammed in the valve spool, which will require dissasembly. Has the hydraulic system been cleaned and flushed out? What oil are you using in it?

          The chattering you hear may be the relief valve.

          Account deleted.

        • June 26, 2011 at 11:24 am #32643
          thunder1sr
          Participant
            • Offline

            Thanks Bob I”ll check for debris in the valve assembly. The joy sticks check out ok. Mike 

          • June 26, 2011 at 1:51 pm #32644
            thunder1sr
            Participant
              • Offline

              Checked it a little closer and noticed a leak coming from a small hole in the bottom of the spool valve body. There are two allens in the bottom that holds a small plate that the hole is in. Still disassembling………….. 

            • June 26, 2011 at 3:14 pm #32645
              Bob Rooks
              Participant
                • Offline

                I guess I should clarify an earlier statement I made about the “multi-function” valve stack. They are not a true joystick in that they will not perform more than one function at a time. They won't. That's why the valve handles are in slots in the console cover. To upgrade to a true multi-function joystick Prince valve stack costs around $1,800.00. Just one of the reasons the Chinese hoes are inexpensive.

                Account deleted.

              • June 27, 2011 at 12:06 am #32646
                ronjin
                Participant
                  • Offline

                  Here is a picture of the swing spool assembly on my JW03 backhoe if that helps you.

                  RonJ

                  ronjin

                • June 27, 2011 at 4:39 am #32647
                  thunder1sr
                  Participant
                    • Offline

                    Thanks Ron that's what I needed to see. Yours is pretty much identical. There is a flat washer on the bottom of the assembly just above the top spring keeper. Then located on top of the flat washer are the o-ring and a nylon ring.  I was concerned there was a heavier rubber washer as well between the top spring keeper and the flat washer that may have dropped out when I took it apart. Mike

                  • June 27, 2011 at 9:45 am #32648
                    Tinbender
                    Participant
                      • Offline

                      It would be a good idea to remove the cap and check that bolt on the rest of them. That valve assembly looks very similar to the two valves on the Chinese loader, my curl valve for the loader had your problem, just not to the point of falling out. It caused failure of the curl function before it had the chance to completely fall out.

                  • Author
                    Posts
                  Viewing 7 reply threads
                  • You must be logged in to reply to this topic.