Thanks everbody for the advice.
When out and bought a 4 lb sledgehammer and beat the rotor like a rented mule. It finally broke loose. The other side came off pretty easy. I did put anti-seize on them before I put it back together. I don't want to go through that again!
I will keep the grinder in mind if this ever happens again. Swinging a hammer in a confined space like that is hard work.
Thanks again everybody.
