>>1164122Spray a little penetrating oil like PB Blaster or Liquid Wrench, wait a few minutes, then wrench it off. If it's still difficult, extend leverage for more torques. If it's still difficult, check to make sure you're turning the correct way. Drive side is regular threaded while non-drive side is reverse threaded. If you still are having trouble and you used up all your can of man, pull out the torch and heat it to loosen. If you're still having trouble after all that, you fail at life and will need to cut it off and/or replace the cranks.