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Super A Clutch release resolved

G

Goodman

Member
Finally got around to working on clutch problem Friday. Had to break the tractor apart 4 times but it is finally fixed.

Lesson Learned - Always make sure new pilot bearing will spin easily on transmission shaft prior to installation.

We broke the tractor apart and removed the new pilot bearing and when put on the transmission shaft it would sieze up by hand.
So we reinstalled the old pilot bushing and that still didn't work although I have no idea why.
Then sanded the inside of the new pilot bushing until it would work smoothly on the transmission shaft - Reinstalled it and all works fine.

Still one question - What is the diffence or purpose of a smooth pilot bushing vs. one with the grooves cut on the inside?

Thanks Guys
 
Thanks for reporting back to the forum! One man's fault is another man's lesson.
Grooves in a bushing help to retain and to distribute grease in a bearing. If the grooves are in a special "spiral" pattern, they help to build up pressure in the bearing (similar to a centrifugal pump), without the need for an external pump (as used in engines, for instance).
See link below.
HTH, Hendrik
Images of
 
As to your last question, I have replaced 2 of those in the last few months, one had grooves, one didn't. I believe the grooved one was from CaseIH, the other came with the rebuilt clutch on another tractor. My guess is the grooves hold the grease better, but I am not sure of that.
 
I didn't read your answer before I gave mine -- one of my faults. The grooves in mine were straight. Obviously the bushings work, but I would feel safer with a bearing.
 
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