I am trying to replace the belt on my 21" 7hp Craftsman which split and I can't seem to find a diagram for repair. Any suggestions? I tried to find the donwload section on the Sears/Craftsman site, and was not successful.

This must be a very old machine, I haven't seen a 21 " tractor from Sears in 20 years. WShich of the three belts broke blade, drive or deck?

It is a push lawnmower and it seems to be the only belt