mine wouldn't budge on my 535 and i had to remove the pump with the fan atached i then beat the pump apart so i could apply ass directly to the shaft, i can't remember what i ended up doing to secure the shaft as it would just spin in the vice being smooth, i suppose you could ether weld the shaft to something or grind flat spots on the sides to give a vice something to grip, i do remember i broke a 32mm wrench (and ****ed up my hand) on that bastard but i kicked it's ass and saved the almost new clutch the previous owner installed
all america wants is cold beer warm cat and a place to take a poop with a door on it