I grease it every 10-15 hours and chhanged the oil around 50 hours. I just didn't know anything else..
The Owners Manual gives you all the info most users are going to need (basing this on the 670 manual and the 4xxx series online manuals).
Service and Workshop manuals are really neat...but pretty expensive to buy (John Deere factory manuals). I did order an I&T Shop manual from Amazon.com. They sent the wrong one..glad they did to...that type manual would be useless to me. No problem returning it.
Tractor Supply Co. also sell's 'em.