TM-9-2320-361-24-1 Field Maintenance Manual Volume 1 for M44A2 Series Trucks
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TM 9-2320-361-24-1 0003 00 0003 00-24 THEORY OF OPERATION (Contd) CHARGING SYSTEM Generating System Operation: The generating system used is 24V direct current (DC), and utilizes a V-belt driven 60A alternator. The major components of the generating system are as follows: ALTERNATOR – Supplies electrical power to operate all electrical accessories and keeps batteries charged when vehicle engine is operating. HEATING SYSTEM OPERATION The following components make up the heating system: HOT WATER PERSONNEL HEATER – Warms interior of vehicle cab in cold weather. Hot engine coolant circulating through heater is utilized to warm air flowing through heater core. An electric motor, with two speeds, powers a fan to force outside air through heater and into cab. HEATER SWITCH – Allows heater fan to be operated at two speeds. C B A 6 1 2 10 A B C