Ice Maker Drum

Hello i am replacing the drum on my whirlpool side by side refrigerator.

I have removed the auger from the bin but does anyone know how to remove the blades in order to get the broken drum piece off. I see nothing to push or stab in order to release these blades.

Please help:confused:

Question. Are you replacing the drum because the blades are cracked/broken? Is the auger one assembly, with the blades? My plastic blades cracked and are leaving pieces in my cup.