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Are you perhaps referring to the seal, Key #22 on the hydro speed change shaft?
If so DEERE part # is M71844, which does NOT come up in the CR/SKF on-line cross reference.
I don't see it on the Timken site, either.
The Timken # you have crosses to a 7414.http://www.skfextranet.com/Catalogs/457010/sealdetail.asp?s=7414[/url]