Remove the tool changer arm cover  and the cable channel cover . Disconnect the shuttle-in and shuttle-out cables .
Remove the umbrella carriage assembly cover. Remove the carousel motor assembly . Make sure the connector bracket is labeled with the locations of the carousel position sensors . Replace the carousel position sensors .
Remove the cam follower assembly . Push the carriage to the side to get access to the shuttle-out sensor . Remove the sensor . Put the other end of the cable  through the hole adjacent to the sensor . Replace the sensor. Move the carriage to the other side of travel to replace the shuttle-in sensor.
Install the cam follower assembly  and the carousel motor assembly . Apply dialectric grease to the carousel position, shuttle-in, and shuttle-out cable connectors. Connect the carousel position sensor cables to the correct locations on the connector bracket . Connect the shuttle-in and shuttle-out cables .Do a test of the tool changer for correct operation. Install the covers [1 and 2].