It is easier to work on this type of unit by
first removing the entire ice maker from the freezer compartment.
The unit is usually mounted to the freezer case by two or more
screws. Remove the bottom screws first. While supporting the ice
maker, remove the remaining top screws. Unplug the ice maker from
the freezer cabinet if you have not already done so.
Along the edge nearest the shutoff arm, a pin
protrudes through the mounting plate (labeled "A" below).
The arm pin has a spring under the mounting plate. Reduce the
tension on the spring by moving the shutoff arm into the "on"
position, down, against the ice maker.