As I remember the A and B numbering systems from the days 43 years ago working in engineering, those letters indicated which part of the company had design control of the part.
How else would you start those tractors with the covered flywheel when the electric starter wouldn't work? Other than pulling them?
You went to the tool box, got a screw driver and pryed off the round sheet metal, spring-held cover, then used the wrench you always carried, un-bolted the steering wheel, took the steering wheel off by wiggiling and pulling, shoved that little casting into the steering wheel hub, finger tightening the nut onto it (so you wouldn't loose that nut, engage the hole with the cross pin in the flywheel just inside the cover and said a prayer or a cuss-word and stuggled to turn the steering wheel. I don.t recall those later model having a pepcock to release cylinder pressure, so the struggle would have been a good one if the tractor wasn't a easy starter!
I remember starting a 36A buried under a 225 two row mounted picker that all but covered the open flywheel. It was not short little stud like the picture, though, but with a longer rod. One would never try that without crawling around under the rig to open or close the petcocks!
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Today's Featured Article - Earthmaster Project Progress Just a little update on my Earthmaster......it's back from the dead! I pulled the head, and soaked the stuck valves with mystery oil overnight, re-installed the head, and bingo, the compression returned. But alas, my carb foiled me again, it would fire a second then flood out. After numerous dead ends for a replacement carb, I went to work fixing mine.I soldered new floats on the float arm, they came from an old motorcycle carb, replaced the packing on the throttle shaft with o-rings, cut new ga
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