You can post your pdf here http://kubotabooks.com/
Just send the pdf to the e-mail listed on the website. Thanks for sharing.
BTW- make the "file name" is something that describes the contents (like "B6100 Parts Manual.pdf) since there is no description added by the website to explain what the file contains.
I hadn't been to that part of the website and the 6100 parts manual is already in there. No reason to waste file space an duplicate someone else's work.
petenpole,
Your much better off going to: http://www.kubota.com/part/partsList.aspx
and pulling the part #'s as the books are ~40 years old and the part #'s have been updated and changed.