OK request send 3D78N-1B S/N 00188-UP ELECTRICAL SYSTEM Section ELECTRICAL SYSTEM 3D78N-1B S/N 00188-UP Komatsu: Engine: 0601 ALTERNATOR AND MOUNTING (20A) 0601 Engine: 0621 STARTING MOTOR AND MOUNTING 0621 Engine: 0631 SAFETY RELAY AND RIBBON HEATER TIMER 0631 Engine: 0641 ALTERNATOR (20A) 0641 Engine: 0661 STARTING MOTOR 0661