You need the special tool to remove the fan clutch.I have also used a long punch and put it at the edge of the fan clutch were it attach's to the pump and smack it to allow the nut to turn. Hit it with the clutch going counter clockwise.
Attachments are only available to registered users.
CAUTION: This nut has a RIGHT-HAND thread and must be rotated counterclockwise to remove it.
Remove the fan and clutch assembly.
If the fan and clutch have to be separated, remove the remaining bolts attaching the fan to the clutch.