TM 9-2320-302-10
0003 00-4
THEORY OF OPERATION - CONTINUED
0003 00
COOLING SYSTEM
The cooling system consists of one circulating pump, a remote-mounted coolant filter, two
180°F (82°C) thermostat for controlling fluid flow, a transmission oil cooler, a radiator, and a
belt-driven fan. The cooling system cools the engine by circulating pressurized ethylene glycol
based coolant through the engine and radiator.
ELECTRICAL SYSTEM
1.
Four 12-volt batteries connected in series-parallel supply the 12-volt electrical system
and provide 24 volts for the starter motor, blackout lights, accessories, and trailer connec-
tors.
2.
The Dual Voltage Alternator Control (DUVAC), mounted on the firewall in the engine
compartment, regulates the distribution of 12 and 24 volts.
TWO
DDEC IV ENGINE
CIRCULATING
INLET
(FROM RADIATOR)
PUMP
THERMOSTATS
