[TR] Calling anyone with transmission rebuilding experience - 2nd attempt, part2
aribert neumann
aribertn at gmail.com
Sun Mar 19 17:52:24 MDT 2023
Next question - my (new) replacement main shaft is oversize in a couple of
places. The diameter under the 2nd & 3rd gear bushings (I have opened up
the bushings to only have a light interference fit). Worst is the diameter
under the rear bearing. I can install the bearing but I have to hammer it
***hard*** to get it to fit on the shaft - can't be good for the bearing -
guessing I might change the inner race diameter a miniscule amount. I'm
thinking of sending this main shaft back to Spitbits and reusing my old
main shaft. I have cleaned up the groove for the split collars on my
lathe. The other damage on the shaft is on the nose where the cage bearing
rides in the input shaft - this damage is only on one side of the shaft and
only on half of the bearing surface (fore/aft). I am already going to
replace the cage bearing with a bearing bronze bushing since the surface
inside the input shaft pocket is showing wear also. The max amount of
surface missing on the nose of the old main shaft is 0.003 in diameter.
Images: exploded view from Bentley manual, nose of the old, worn
mainshaft
Your thoughts and suggestions please - off in digest mode awaiting your
responses. Trying to formulate a new plan of attack for Monday morning.
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