[jerryhawthorne]

I agree, the lock up is no doubt on the shaft and not the wafers. I had one that I couldn't turn with vice grips on it. A squirt of PBblaster penetrating oil and wrapping the shaft with a damp paper towel and hitting the threaded area with a propane torch on a fine flame to warm it and it started to move. Repeated several times and it was free. Repeated heat on the bearing area while keeping the shaft relatively cool and the penetration oil did its job.
Good luck and don't burn down the house.
Jerry