So I am replacing a belt driven tranny on a lesco WB. I am salvaging one off a older mower I have and can't remove the cotter key from the drive pully shaft. Any ideas? have tried vise grips screw drivers and a hammer..... Don't have a vise here to lock it in. Thinking of putting some heat to it but I don't want to mess up any seals. That 1/2 the reason I am replacing this thing in the first place.