Posted by Tom in Iowa City on March 16, 2011 at 19:14:26 from (173.30.220.194):
McCormick-Deering 22-36 Project.
Transmission almost put back together after replacing four tapered roller bearings and the spline shaft hub, and making some custom chrome-cobalt castings to take up the wear on the spline shaft, using these 6 shims between the hub and the spline shaft to successfully take up the slack. Before completing the rebuild, I decided to test the gear mesh, without the entire weight of the tranny to contend with. I put the tranny back into the frame, fitting the two tapered orientation pins, one on each side, also using the proper thickness gasket material under the tranny where it meets the frame, then bolting the tranny down.
I painted two teeth on the ring gear with marker paste and then ran the gears together, back and forth 30 times or more and all the way around several times.
The following image shows the gear mesh pattern. Without giving my opinions, which I have, I would like to have your feedback on what conclusions to draw and what to do.
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