Ice Maker stopped working due to defective timing gear

I removed two screws on the top and one underneath the unit. Then I disconnected the cable. The hardest part was getting the nut driver on the bottom screw because it was obscured by the unit. The replacement unit plugged right in! I got my first batch of ice in about 20 minutes. All I really needed was the timer unit, but the entire ice maker wasn't much more expensive, especially when you consider the time saved on installation!