PLANETARY TRANSMISSION GROUP 4S8686 - Caterpillar

Replacement Procedure
The new GSC must be reprogrammed after the new GSC is installed. If the GSC that is being replaced is functional, then make a note of the following items: hourmeter, all engine setpoints and any spare inputs or outputs that are programmed. See System Operation, "Engine/Generator Setpoint Viewing OP2" .
Shut down the engine. Remove the positive lead wire from the battery.
Remove the harness connector from the GSC. A 4 mm hex wrench is required to turn the fastening screw.
Make sure that all wires are marked. During reassembly, the wires must be reattached. Remove all wires from the terminals and from the posts of the relay module.
Remove the six nuts that fasten the GSC to the front panel. Remove the GSC.
Place the new GSC in the front panel. Install the six nuts. Tighten the nuts.
Reconnect the harness connector to the GSC. Reconnect all the wires to the terminals of the relay module that were removed. Reconnect the positive lead wire to the battery. If necessary, see the Generator Set Wiring Diagram Testing And Adjusting, "Schematics And Wiring Diagrams".
Reprogram the setpoints, the spare inputs/outputs, the hourmeter, the voltmeter/ammeter programming, and the AC offset adjustment. See System Operation, "Service Mode". Use the values from the original GSC. Refer to Step 1.