Vibration can relive the tension on a tapered shaft, Not heavy hitting like a solid hammer has but a high low tension hit of an short barrelled air hammer. If you had the wrong remover, possibly you have acctually threaded the remover into the crank. If this is what happened you are in for a problem. I had to do this on an older Arctic Cat a person brought to me. I actually drilled multiple holes into the clutch shaft to release the tension once I cut the shaft. Alot of work but I did save the crank. Good luck Al