Really? First hit in the following link is a manual.
There should be plenty of reading in the links in the searches.
https://www.google.com/search?q=Rock...hrome&ie=UTF-8
This searches this site:
https://www.google.com/search?sxsrf=...4dUDCA0&uact=5
I've read that bearings and seals can be had since they're standard. I recall seeing a post with numbers, etc. but don't ask me where it is.