BACK HOE NOT WORKING

Forum Forums Site Questions and Help and Features BACK HOE NOT WORKING

Viewing 11 reply threads
  • Author
    Posts
    • #30795
      Glenn Southworth
      Participant
        • Offline

        I have a LW6 backhoe and it stopped working the last time I put it on the tractor. It is pumping fluid but not building pressure. It just seems to just circulate and it causes the fluid to foam. I took the pump apart but it looked ok. I have heard people saying that they cleaned the relief valve? I took the valve out that adjusts the pressure and it looked clean. Any help would be appreciated. thanks, Glenn

      • #36217
        RichWaugh
        Participant
          • Offline

          If it is foaming, it sounds like it is sucking in air somewhere.  Check the intake side of your pump system thoroughly.  Foamy hydraulic fluid is full of air, so it compresses and can't transfer power.

        • #36220
          Glenn Southworth
          Participant
            • Offline

            I don't think its sucking air it wont do anything.Stabilizers wont even go down. I am not sure what valve people are cleaning and where it is. It just seems to be circulating and not building any pressure at all. What holds the pressure in the valvebody of the controls? Thanks for the idea though I will check again.

          • #36221
            ronjin
            Participant
              • Offline

              First let us see if we are talking about the same control valve.

              ronj

              http://i289.photobucket.com/albums/ll212/ronj2000/TopofControls.png

              ronjin

            • #36222
              Glenn Southworth
              Participant
                • Offline

                Yes that's what I was talking about. I took out the valve on the right…looks like its too adjust the pressure . Didn't see any dirt

              • #36223
                ronjin
                Participant
                  • Offline

                  When you look at the left portion of the picture, the lower left line is labeled as Hyd In.  The portion of the control valve that is just above that and to the left holds the Relief Valve.  It has a screw plug with an allen wrench removal slot.

                  Here is a picture of the relief valve assy.

                  RonJ

                   

                  http://i289.photobucket.com/albums/ll212/ronj2000/JW03ReliefValvePieces.jpg

                  ronjin

                • #36224
                  Glenn Southworth
                  Participant
                    • Offline

                    I took one out that looks like that on the right side….but I don't think I got it all I think the “piston” with the o ring is still in there. Maybe that is stuck. Its raining now but I will look at the left again to see if I missed it tomorrow. Thanks for the picture that will be helpful.

                  • #36238
                    Glenn Southworth
                    Participant
                      • Offline

                      Got it working. Think the valve was stuck. You were right the hoe was off the tractor and i took the back cover off so the valve was on the right. Now that its working the  the  control valve for the boom is leaking out the botom cup. I figure the seal is gone. Can you buy rebuild kits for those or do you need to buy the whole valve assembly? Im going to take the valve out tomorrow and see what it looks like.

                    • #36239
                      ronjin
                      Participant
                        • Offline

                        Here is what the spools look like.

                        RonJ

                        http://i289.photobucket.com/albums/ll212/ronj2000/BHSpool.jpg

                        ronjin

                      • #36240
                        Glenn Southworth
                        Participant
                          • Offline

                          I have oil leaking into the spring area. Im thinking those are seals just above the spring? The orings should be easy to get but the other ones look like squared orings? Do they make kits or where can I get them. Thanks

                        • #36241
                          RichWaugh
                          Participant
                            • Offline

                            In the photo, the others look like cup seals to me, but I could b e wrong.  Still, most of these valve parts are kind of standard and a hydraulic shop should have them.  If not, you can probably find them at McMaster-Carr or MSC Industrial Supply online.  You just need to get accurate measurements fom the old ones and they'll be able to come up with replacement parts.  I'd start by checking with the Jinma dealers here, they may have some parts in stock.

                          • #36255
                            Glenn Southworth
                            Participant
                              • Offline

                              ok. Thanks for the help guys!

                          Viewing 11 reply threads
                          • You must be logged in to reply to this topic.