The inner bearing can be a real pain. I've heated them with a torch but you have to be really careful not to melt the tub. I just had one in the shop that was being stubborn. I wanted give the inner bearing a shot of liquid 134a to shrink the bearing, but that would be illegal. So, I took it outside and gave it a shot of liquid propane. I purged all the LP out of the tub with compressed air before pounding on the bearing. It seemed to work really well, only took a few whacks after that. Of course, there's no way I could do this in a customer's home.