HYDRAULIC AR 8G2028 - Caterpillar

Illustration 1 g00603288
Bus Transformer Box + (BTB+)Replacement Procedure
Shut down the engine. Remove the positive lead wire from the battery.
Make sure that all wires at the terminal strip of the BTB+ are marked with the respective termination point. During reassembly, these wires must be reattached to the correct terminal. Remove all external wires from the terminal strip.
Disconnect the BTB+ connector from the harness connector.
Remove all mounting nuts and mounting screws that fasten the BTB+ to the subpanel. Remove the BTB+.
Place the new BTB+ in the subpanel. Install the mounting nuts and mounting screws. Tighten the mounting nuts and mounting screws.
Reconnect the harness connector to the BTB+. Reconnect all the wires to the terminal strip that were removed. Reconnect the positive lead wire to the battery. If necessary, refer to the "Generator Set Wiring Diagram" in Testing And Adjusting, "Schematics and Wiring Diagrams".