Posted by Tom in Iowa City on February 27, 2011 at 06:01:22 from (173.30.220.194):
I have learned quite a bit. Problem, again, is to try to get a tighter fit between the spline shaft of the transmission and the transmission joint (hub) due to excessive wear.
Here is what I have learned: 1. Probably no problem to run the tractor AS IS and except the wear. I will be running it quite little, although I want to take it to a show once in a while, run it a little around my shop from time to time.
2. To fix it: a. Welding, milling and re hardening. Concerns with welding: A. getting a hard enough welding rod. B. softening of the shaft due to heat incurred with welding. C. need or no need to re harden the shaft.
A local shop estimated it would cost about 600 dollars to do this. A little rich for my blood.
A neighbor offered to TIG weld one spline at a time and then I use my sweat equity to grind to fit. Then we do a spline opposite to that one, again I regrind.
Question: would this weld be hard enough to be adequate? (It would be normal TIG weld, if there is a normal hardness with TIG weld.)
Question: would this soften the shaft enough that I would have to reharden it?
Could I take the welded, ground rod to a shop to have them re harden it? I understand re hardening might entail heating to say 1500 and then quenching and then heating to say 750 and quenching to draw it.
I have had a neighbor 30 miles away offer to help also.
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