OK request send 3D84-1F S/N 13021-UP ELECTRICAL SYSTEM Section ELECTRICAL SYSTEM 3D84-1F S/N 13021-UP Komatsu: Engine: 0601 ALTERNATOR AND MOUNTING 0601 Engine: 0621 STARTING MOTOR AND MOUNTING 0621 Engine: 0631 SAFETY RELAY AND THERMOSTART TIMER 0631 Engine: 0641 ALTERNATOR 0641 Engine: 0661 STARTING MOTOR 0661