Turn the ice maker off by pressing the button at the front.
Remove the ice bin and empty it into the kitchen sink.
Upturn the ice bin and remove four screws to take out the bottom, with a Phillips-head screwdriver. Remove a fifth screw that holds the arm controlling the type of ice coming out.
Find and press two tabs, at the bottom of the bin, connecting the dispenser wheel to the bin. Remove the wheel.
Slide out the old drive cup from the bin and slide in the new one.
Reinsert the five screws and return the bin to the unit. Turn the ice maker back on.