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Join Date: Apr 2016
Re: Would anyone be Interested in my Chinese Tractor Experience
Did/do you have a clutch/flywheel for the transmission? You'd want to make sure you get enough distance to stuff everything inside, without needing a spacer or only a short spacer, and be able to mount a starter at a reasonable spot, and the clutch throwout bearing (that appears to be installed in the transmission) will work with the clutch.
I would've suggested just using your mill/welder with a plate of 1/8" steel, and measure everything out youself, then mill (and maybe weld hole over and redo it as necessary) until it fits perfectly. And even a paper rub (as in, place paper over end of transmission, tape in place, rub a pencil on it to locate edges and holes) is remarkably accurate as a pattern for transferring to something else.
and one thing you'll/the machine shop will need is todo is locate the centerline of the transmission input shaft w.r.t. the housing, as your adapter housing/plate will need to put the center of the crankshaft along that centerline. I'm pretty sure it has to be very close, as if it is misaligned, you'll get pretty good vibrations there. You might want to make that plate I suggested, then drill/cut a bit hole about where the transmission input shaft is, so you can more easily measure the location of the shaft relative to the mounting bolts. Or make a tube that fits very precisely on the transmission shaft, that extends past the edge of the transmission housing, and then measure to that tube.
The 3 most important "locations", that need to be accurately placed relative to each other, are the 2 indexing pins sticking out of the transmission housing, and the centerline of the transmission input shaft (which will translate to your engine's adapter plate as 2 holes for indexing pins sticking out of the engine housing). Those indexing pins make sure everything is properly aligned, and the bolts just hold everything together (so the bolt holes don't have to be as accurately located/sized, just so you can get the bolts in and they can clamp the bits together.
Last edited by dave_r; 06-06-2019 at 03:51 AM.