KitchenAid Blender Coupling 9704230
KitchenAid Blender Coupling 9704230 - installation
Directions with the part tell one to pry off the old drive coupling with a large screwdriver.

The coupling can be removed more easily with a pliers (such as channel lock) and a 9/32" sheet metal wrench. Gripping the coupling shaft requires a very thin wrench. After engaging the shaft with the wrench remember to turn the coupling clockwise.