As Bruce suggests....the 670169
knocker tool screws onto the exposed, threaded
end of the crank, and gives protection to the threads and helps prevent breakage
of the end of the crank. Screw it down onto the flywheel, then back off a turn.
Applying some upward prying force to under the lip of the flywheel....hit the knocker
with a hammer lightly and the flywheel will break loose from the taper of the crank.
Flywheel key is part # 610961
if you need new key.
Be sure to re-torque flywheel nut to 550 inch pounds
, or 46 ft lbs