RE: K&B 7.5 OB main bearing seized
The above works for getting a bearing out of the aluminum case.. Takeing the bearings off the PTO shaft or crank can be a pain. Use a small bearing spliter and if need be, a bearing puller. Heat won't have any effect on the steel PTO or crank.
I've started to heat up the case using a small propane torch. Hold the mounting lug with vise grips, heat the case up around where the bearing sits. About 30 secs will do, the bearing will drop out. Tap lightly if need be on a hard surface.