Re: transmission noise

Posted by lee on December 18, 2005 at 13:25:31 from (12.6.155.115):

In Reply to: transmission noise posted by sven on December 18, 2005 at 12:58:42:

Re-shimming a ring and pinion gear set after it"s been in service a while is probably not a good idea. I did same once and although no problems developed in a non-working tractor I have thought about it since so this tractor I got apart right now will be shimmed back to where it was even though backlash is slightly greater than spec. Reasoning I"m using now is these gear sets wear in together so re-shimming and putting worn gears back to backlash spec is liable to create more noise in the least and possibly gear set failure in a working tractor. Re-shimming moves the contact patches so worn gears will now have incorrect smaller high stresssed contact patch areas because the wear patterns are mis-aligned
and high areas are in contact. I think better to let them run where they have been running with more backlash and if backlash is just too excessive to where it"s a possible problem they need to be replaced altogether.

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