Duane:
I have the pt422 with 290 hours on it , I have the 48 inch mower, tiller, and small bucket. I have had it a little over 2 years and the only problems I have had was the quick attach hydraulic hose fitting would not release very easily, power trac sent a new one which works fine, and the other problem is gas leaking out top of gas tank if I fill it too full. I have used it prettty hard different times digging shale and small trees. It is a very well built machine and it has really surprised me as to what you can do with it.
Power trac gives you a manual on the machine with parts listed and how to do different repairs and service, and if you go down to pick your machine they give you a class on servicing the machine. As far as the attachments go they did not give me any manuals on them, they said they were working on manuals but did not have them available then.