removing a worn mandrel
craftsman dyt 4000. My mandrel on the left side is shot--the star pattern is worn down/off. So the blade is off since it spins freely, How do I remove the nut on top of the pulley? I've used a piece of wood on the right side blade but the pulley just slips on the belt when I apply pressure on the wrench. There's nothing on the bottom side of the shaft to keep it from turning. Ideas??