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  1. R

    742B died

    Thanks for the feedback, but with all my tools at another house 60 miles away, and cold, I called the dealer so I can incur some end-of-year expenses. Will check back with diagnosis.
  2. R

    742B died

    Loader was running at high idle when I connected jumper cables to the JD diesel. It was dark and I had no flashlight, and I connected cables backwards (they got hot) -- loader quit. When trying to re-start, it would turn over well and try to start, but just wouldn't catch. Two hours later it...
  3. R

    742B want to use Root Grapple

    I have the same machine w/ same engine and factory original hydraulics w/ standard fittings. My grapple is of my own design and fabrication, requiring nothing special for flow or pressure. In 15 years of operation I have never needed more hydraulics than the machine can supply. Biggest problem...
  4. R

    Electrical problem on 742B

    Very disappointed that no-one offered suggestions, but I got it started. That is not o say I found the problem. First of all, I did find the wiring diagram in the service manual, but it is not in the parts manual. Found a thread on this forum from several years ago in which the operator...
  5. R

    Electrical problem on 742B

    Turned the key and nothing--nada! Turned it again and it started right up, but stalled. Turned it again and nothing -- no groan, no click, no movement of the ammeter needle. Disconnected the starter relay, and shorted the red and green/white and the starter turned over just fine. It would...
  6. R

    742b Fuel tank Sending Unit

    Mine is also very erratic. I replaced it with a new one several years ago, and it worked for a while. I think mine is more a case of the float rubbing on the inside of the tank rather than being an electrical problem. Too much of a PIA to repair, so I just add fuel frequently
  7. R

    742B electric fuel pump

    Back again. I read the fuel pump instructions, and spent the day gaining access to the right side of the engine block. (Must remove governor linkage to remove battery to create work space) There are two cast bosses just above the oil pan which are tapped to 7/16" fine thread, and they are...
  8. R

    742B electric fuel pump

    The fuel pump on the Mitsubishi engine is on the top right, snug between the distributor and carb. I appreciate the wiring instructions. I can fabricate brackets to mount the pump on the left, just a few inches above the starter. Also, thanks for the pointers re: main jet and drill sizes. I have...
  9. R

    742B electric fuel pump

    I have posted a few times over the years about fuel problems with my machine. I removed and cleaned the gas tank and fuel pick-up, which helped greatly, but it still won't run at operating rpm unless the choke is partly closed. I rebuilt the carb twice, and had a shop do it last winter, but no...
  10. R

    742B gas gauge

    When re-assembling my gas tank, I tried to trouble-shoot my gas gauge, which hasn't worked for years. I installed a new sending unit several years ago, but it never worked reliably. With a multimeter, the sending unit reads max ohms at empty, and min ohms at full, and seems to respond correctly...
  11. R

    742B will not run properly

    I hate to declare victory too soon, but debris in the gas tank seems to have been the problem. I tried the hose in a gas can procedure, and it ran well enough to merit removal of the tank. There was a thin-wall 1/4" tube connecting the heavy fuel line with the metal intake screen , and that thin...
  12. R

    742B will not run properly

    PS--the gas has ethanol treatment and dry gas added.
  13. R

    742B will not run properly

    Am second owner of this machine (2006) w/ 3200 hrs. In the last 8-10 yrs it has never run absolutely correctly. It starts fine, but seems to always need partial choke. I have rebuilt the carb twice, and added a second fuel filter --clear plastic so I can see the fuel. It was running adequately...
  14. R

    742B bogs down

    Update--Just received a nice Sun tach and dwell meter. Brand new, but probably 30 yrs old-nice companion to my Sun timing light. Using Service manual, pg 7B-12, I checked carb adjustments, then checked the points. They were closed too much, so adjusted them. Started it up, and it runs better...
  15. R

    742B bogs down

    That is also on my to-do list. Mine is the Mitsubishi engine
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