GENERATING SYSTEM OPERATION (200 AMPERE ALTERNATOR)

TM 9-2320-280-20-1 1-23. GENERATING SYSTEM OPERATION (200 AMPERE ALTERNATOR) The 200 ampere generating system maintains battery charge and provides electrical power to operate vehicle circuits. Major components of the generating system are: BATTERY GAUGE - Indicates electrical system voltage. It is connected to the electrical system through circuit 567. ALTERNATOR (200 AMPERE) - Is rated at 28 volts, 200 amperes, with external regulator. The alternator assists and recharges the vehicle batteries during operation. CIRCUIT 568/CIRCUIT 5 (ALTERNATOR A0013036AA ONLY) - Senses vehicle voltage, and activates the field current in the alternator to generate current. PROTECTIVE CONTROL BOX - Protects the vehicle electrical system in the event battery polarity is reversed. CIRCUIT 2 - Sends AC signal, indicating alternator shaft rpm, to frequency switch in protective control box to prevent operation of starter solenoid when engine is running. BATTERIES - Two 12-volt batteries are connected in a series to provide 24 volts to start vehicle and assist alternator during operation. POSITIVE CABLE - Transmits alternator output to maintain battery charge. A fuse at the alternator power stud will prevent damage to alternator if battery polarity is reversed. CIRCUIT 3 - Connects to negative stud on alternator with engine ground strap to provide a ground circuit to alternator. 1-42