50 hour re-torque

Forum Forums Tractor Operation And Maintenance 50 hour re-torque

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    • #31056
      TONE-TONE
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        My 2013 Jinma 254 is due for this.  The thing I'm concerned about is the valve cover has a spring leaver type of an assembly on the back side ( firewall side ) of the valve cover.  Afraid I will disturb or disconnect something on the valve train when I lift the valve cover off.  Can any one give me a tip on how to proceed????

        Tommy ??

        pjr  ???

         

         Thanks to all who reply !!!!!!

      • #37925
        DavidPrivett
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          I assume that what you are writing about is the compression release, some tractors this is a tricky thing to remove and restore to where it needs to be. Before you start to remove it look over it closely , If I remember right the is a cotter pin that needs to be removed on a lever on the rear of the valve cover which separates the linkage from the compression releases rod that compresses the exhaust valves. I have only done this once and it has been a few years back so I hope I go it right.   

        • #37926
          TONE-TONE
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            There is nothing connected to it.  It stands alone.  Just a spring/leaver assembly.

          • #37927
            DavidPrivett
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              ok I have heard of tractors that had conflicts in making linkages line up and work and not hooking them up. But I am pretty sure about what you are writing about as being the compression release. I suppose that once you get the valve cover off you could try to figure a way to do away with it and plug up the hole, It would make access easier in the future. Is there a bolt on the lever that you could remove then slide the valve cover to the rear over the valve release  rod , it has been to long I can not remember exactly.

            • #37928
              Tinbender
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                Mine is the same way, an unused compression release. And I'm really late doing the re-torque as it's sitting at around 95 hours right now. Hey, I talked about it the other day with the friend that helped assemble it.holeagain

              • #37929
                DavidPrivett
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                  yea I know but look at it this way a retorque now and the bonus of setting your valves easily or possibly  a head gasket replacement later with all the water issues that go along with it. yea that should do it. Is it done yet?

                • #37930
                  TONE-TONE
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                    Tinbender, let me know how it went when you get around to  doing it.  Moving the leaver by hand there is no resistance.  So it seems that it is not connected to anything on the valve train.  But still do not know what will happen when one lifts the valve cover off.  Many thanks !!!!!!

                  • #37931
                    DavidPrivett
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                      I think most of the engines have a reusable rubber gasket on the valve cover.

                    • #37932
                      Tinbender
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                        Two-Tone, Is there no resistance or very little resistance? I do remember when putting the tractor together and checking the valve adjustment from the factory (way,way off) I was surprised how little pressure it took to activate the compression release. I could do it easily with my thumb.

                      • #37933
                        TONE-TONE
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                          I would say very little resistance.  About what it takes to move the spring.  Are you going to attempt the re-torque soon ???????  

                        • #37934
                          Tinbender
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                            Most likely in a month or two. I need to finish some other projects first and wait for this month long heatwave to be over with.yell Then I'll do the re-torque, change the gear oil and hydraulic fluid, and the rubber coated seals on the steering ram and hit the grease fittings again.

                          • #37935
                            dogdoc
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                              I read the compression release cable was incompatible with the shuttle shift mechanism.  You should see a small hole in the dash on the lower left side where the compression mechanism handle should be.  I simply removed the lever, spring and all parts inside the valve cover of the compression release at the 50 hour.  That was 120 hours ago and all is well.

                            • #37936
                              TONE-TONE
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                                dogdoc, so when I remove the three bolt caps on the valve cover and lift it off of the cylinder head.  What can I expect to happen ???  Any parts fall off, come loose ??  Just wonder what is inside that valve cover.  And is that compression relief functioning at all???

                              • #37937
                                dogdoc
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                                  I do not recall exactly but it was obvious when you see it.  I believe you have to remove the compression mechanism to get to all the head bolts, so I just did not put mine back on.  As I remember it is a lot like the 4 wheel drive ball bearings a lot of grease holding things in place while you try to get it back together, not worth the trouble for something that serves no purpose

                                • #37938
                                  dogdoc
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                                    no it does not function without the cable in place to actuate it

                                  • #37939
                                    DavidPrivett
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                                      with that said it might be possible to create linkage or a  cable to make it work. I use mine to top off the oil filter after a oil change, I find that it does not do much good as a start assist in cold weather , but to each his own ideas.

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