I have pulled my grant wheel off twice trying to get it lined up with the wheels. Still no success on that. of course I don't think it's that difficult and my father gives me some fool proof instructions. But I still can't get right. I think it's an experience thing.
3rd try is a charm though.
a nut on the rod keeps the wheel on the shaft. Remove it then remove the wheel with wheel-puller if need. Good luck