TM 9-2320-209-34-2-2 17-36. CIRCUIT BREAKER BOX ASSEMBLY REMOVAL, REPAIR, AND REPLACEMENT. TOOLS: No special tools required SUPPLIES: Solvent, dry cleaning, type II (SD-2), Fed. Spec P-D-680 Clean rags Emery cloth PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, hand brake set. WARNING Disconnect all external supply cables before working on circuit breaker box. Electric current can cause injury to personnel and damage to equipment. Preliminary Procedure. Disconnect external power supply cables. Refer to TM 9-2320-209-10. 17-387