DavidPrivett

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  • in reply to: ZL-20 FEL lost Hydraulic Pressure #50040
    DavidPrivett
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      the problem with the quick connects was not that they leak , the problem is that they fall apart internally in some cases , others have stated that the chinese rubber hoses break down internally and pieces collect at the quick connect and plug the flow of the fluid. I believe that your tractor has a screen hydro filter ,I think under the floor boards? if you have not looked at it in a while it might not hurt as then you will know if there is stuff in the oil floating around. good time to check the condition of the oil too, moreso if it is stored in the weather and not under cover. but you never know it might have been air that has worked its way out since it has restored function. when it was rebuilt the oil should have been drained and changed so it really should be ok one would think.

      in reply to: ZL-20 FEL lost Hydraulic Pressure #50037
      DavidPrivett
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        which jinma model is it ?

        in reply to: ZL-20 FEL lost Hydraulic Pressure #50036
        DavidPrivett
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          I assume that the loader has quick connects, I would check those first. but the problem as you describe makes me think pump, unless there is air trapped in the system that it has not purged. if you can plumb in a pressure gauge somewhere that should be under pressure on start up should be helpful. does the three point lift work ,I think everything runs off one pump ,power steering does too.

          in reply to: How to bench test a ignition switch for a Yachai dozer #50034
          DavidPrivett
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            if you have trouble in the future I would suggest that you pull a ground from a good point on the engine block VS. drawing a ground thru the switch , it seems to me that would add resistance in the circuit which is not wanted.

            in reply to: How to bench test a ignition switch for a Yachai dozer #50030
            DavidPrivett
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              no I do not but, I think I can write it so you can understand. I will need to know something though . How many posts are on your relay 3 or 4?

              in reply to: How to bench test a ignition switch for a Yachai dozer #50027
              DavidPrivett
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                just as a fyi the start circuit is the hardest thing the switch does, It will extend the life of the switch by adding a start relay to the starter solenoid so the switch carrys only the load for the relay and not the starter. And the same can be done for the glow plugs. I also believe that the start switch restricts the amount of amps the starter wants making it not engauge as it should getting the engine to the proper starting rpm , moreso when cold temps are there. Just a thought.

                in reply to: Possible Starter replacement #50025
                DavidPrivett
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                  I can write it out what I did. I used hose clamps around the starter and attached a 3 lug ford type relay to the starter (of course you can attach some other place) . Take the battery cable off the starter motor and put it on the relay . Place a new cable to the other side of the relay to the starter where you pulled off lead. Take the wire from the starter that comes from the key switch  and move it to the relays small lug. It will be better if you use some like 10 gauge wire and ground the metal relay base to the battery or engine block if you use hose clamps  . This will not be necessary if you can bolt the relay to the frame . That should be good to go. hope this helps

                  in reply to: Possible Starter replacement #50021
                  DavidPrivett
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                    That would be good information to know, if you find out please list the starter number you have and list what you find will fit. I was having trouble with mine but it ended up being the junk wiring and design the chinese use. I wired a seperate starter relay to power the starter instead of running the starter load thru the starter switch. And so far no more problems and that was done several years ago.

                    in reply to: How to bench test a ignition switch for a Yachai dozer #50015
                    DavidPrivett
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                      a simple vom will do it once you have it out, any resistance more than a few ohms between the posts (really should be 0 ohms) when the switch is placed in the used positions and if it is kinda where you have to wiggle it to read the reading ,replace it. these factory switches do go out, so a better quality replacement is not a bad idea.

                      in reply to: Your Profile Is Your Gateway #50011
                      DavidPrivett
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                        that is not the only thing broken on this room. maybe Hal will get to it.

                      Viewing 10 posts - 71 through 80 (of 1,071 total)