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I have a JM284, with the Laidong KM385 engine. On mine, I have to fill the oil for the injector pump, thru the dipstick opening. It's a long annoying process, but I know of no other way. There should be a dipstick for that hole, only a couple of inches long.
If it has gotten hot, be sure to have that head magnafluxed to be sure there are no cracks, and have it checked for flatness. As a side note, I have in my possession, an original 1948 8N Operators manual from the Ford Motor Company. If you find you need any of the info from it let me know and I'll copy the approriate passages for you. It contains quite a lot of information, not usually found in today's operators manuals.
I do believe that whatever it was did play a big part in the bearing failure. I also believe the original engine assembly process was less than ideal in that it seemed like a lot more dirt in that engine than the hours on it would cause.
On a brighter note, I finally got it all back together today, checked everything over (no left-over hardware), and refilled the radiator and the crankcase. I locked the engine kill with vice grips and spun the engine over long enough to build oil pressure and purge the fuel lines. tightened the lines up again, released the engine kill, gave it about 10 second of pre-heat and cranked it over. 3 time over it fired and then kept running. Smoked like crazy for a minute or two then cleared and began running smoothly. checked ot over and the only leak I have now is one up by the steering cylinder. I'll address that tomorrow, then take it outside so I can let it run a bit longer and check things over some more. I also know it moves and the loader is working, so i am hopeful.
I do believe that whatever it was did play a big part in the bearing failure. I also believe the original engine assembly process was less than ideal in that it seemed like a lot more dirt in that engine than the hours on it would cause.
On a brighter note, I finally got it all back together today, checked everything over (no left-over hardware), and refilled the radiator and the crankcase. I locked the engine kill with vice grips and spun the engine over long enough to build oil pressure and purge the fuel lines. tightened the lines up again, released the engine kill, gave it about 10 second of pre-heat and cranked it over. 3 time over it fired and then kept running. Smoked like crazy for a minute or two then cleared and began running smoothly. checked ot over and the only leak I have now is one up by the steering cylinder. I'll address that tomorrow, then take it outside so I can let it run a bit longer and check things over some more. I also know it moves and the loader is working, so i am hopeful.
I use my PTO shield anytime I'm not using the PTO. Keeps the shaft clean and rust free, and also prevents getting grease on my clothes when I am workikng in that area. Yes I can get along without it, but since I have it, I use it. This is on my Ford 640. Teh Jinma has one and is installed, and will remain so once I get it back into use.
Bob, I did make witness marks on the rods. But that was several weeks ago, and at the time I had made them, I hadn't paid much attention to the markings on the main caps. Once I got focussed on those main caps, i marked them as well, and thought I had marked them with the same orientation, and the arrows pointed towards the left side of the engine. Well, my photos proved that to be mistaken so I put them back the way they were when I removed them. Once I made that mistake, I began to question whether or not I had actually marked the rod caps on the same side as the mains were, and so on it goes.
I had a series of strokes about 3 1/2 years back, and since then I've made a nearly full recovery. However I have also experienced occasions when my memory isn't quite up to par. More than once, something I was absolutely certain of, proved to be not the case, and this rebuild is a case in point. And that's why I am pausing and asking a lot of questions as I go along here. I had planned to have my replacement parts ordered and on hand before I did so much dismantling, but of course, that didn't work out quite that way. It's okay, I'll muddle thru and get this tractor back together and running right. I think I've now gotten past the point where my recollections will matter so much. God gives us challenges to grow us and teach us, and so I press onward.
