Recent content by jlmoon

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  1. J

    New owner of an 843 -- few questions

    Figured I would chime in on this broken bolt. Heat from a map torch and some good penetrating oil in that sequence can be your best friend after you drill out the center and use a ezout. Heating and light tapping with ball peen hammer works pretty good most of the time JLMoon
  2. J

    843 axle seals

    Greetings! If you have the time, tools and energy, in my opinion it is best to split the top frame/body from the lower drive / axle / gear box assembly and then remove the access plates on top of the drive frame assembly. This really makes for a good experience performing this level of service -...
  3. J

    SERIOUS PROBLEM: Bobcat 843

    aaron, Couldn't you have drilled a very small hole in the middle of that sheered bolt to fit a ezout and with a little heat applied back that broken bolt right out of there? Saving the original threads and all? JLM
  4. J

    Bobcat 631 bucking and jerky!!

    Steve, I just reread your last post. If you have any dirt anywhere.. my suggestion is a complete hyd oil system drain & flush. You will be money ahead! Dirt, silicone rubber(gasket material) are no-no's in a hydraulic system. I would also suggest you install the recommended oil (usually spec'd...
  5. J

    Bobcat 631 bucking and jerky!!

    Hello Steve, The small (3rd) line from the drive motors will be your case drain, this is the return line back to your low pressure side of your hydraulic system (someone correct me if I'm wrong) but should be around 125 to 250psi. I believe there are a couple of case drain filter assemblies...
  6. J

    1991 843B

    Hello Bud, If it is the Isuzu 4JB1 which I suspect it is. I have some pretty good makings of a nice one. I just rebuilt the one in my 853 and it cost me around $3500. That price was mostly for parts ... ie., gaskets, rings, bearings - both cam , rod & mains, new crank shaft, valve job, seals...
  7. J

    853 Hydro-Stat Teardown & Inspection

    Hello Taz, Yes, I really like the finish and durability yellow cad provides, especially with the extremes these machines are put through. I hope to have the complete assembly ready to put back into frame by the weekend. Finally the pump is complete and ready to go. The wiring system is my last...
  8. J

    853 Hydro-Stat Teardown & Inspection

    Greetings to all!, Almost faded into the old woodwork over there somewhere! It has been some time now since I have had the opportunity to update my progress on my rebuild, finally got back on task and have begin to reassemble the hydro-stat pump after obtaining all the parts and refinishing the...
  9. J

    battery reversed?

    Looks like to me someone has been messing with your battery cables either due to failure in the field or maybe they were color blind or didn't have any concern for standard color coding or wiring standards at the time of repair / restoration to service. I can't recall any devices after the late...
  10. J

    Becoming a Traitor

    Larry, Being the traitor you are.. :).. you might check out TractorByNet.com... er.. I have some JD stuff too so don't feel to bad.. .. lol.. in the past I have threatened to paint one of my Bobcats Green with Yellow wheels.. :) Jon
  11. J

    bobcat 643 hydros not working

    Belt breakage? Could be result of catastrophic pump internals failure?
  12. J

    Bobcat 763 arms creep up when attachments are used

    to finish my pondering, Something has to be pushing fluid into the cylinder end of those boom cylinders and taking fluid from the rod ends of the same! Shared Equalizer / Balance valve block? don't know!
  13. J

    Bobcat 763 arms creep up when attachments are used

    I might be overloading myself here.. don't know the 763 very well!, but didn't some models have a self / auto leveling feature (don't know the principle of operation, but obviously a hydraulic function) which changes the tilt angle of the bucket as you raise up to keep level.. say for dumping...
  14. J

    610 Serial Number

    Helo, if is anything like a 843 or 853 look on the main frame on the front of machine behind the tilt cylinder area.
  15. J

    04 s220 with low/ extremly low charge pressure

    I'm going to wonder where all the metal fragments wound up? I'm sure the hydrostat timing / rotate groups are trashedtoo. The entire machine hydro's will need a good flushing... wow!
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