TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
COOLING SYSTEM
The Cooling System protects the engine, transmission, and air compressor by providing a
means of removing the heat generated during operation of the vehicle.
1.
The radiator pressure cap, in combination with the ethylene glycol-based antifreeze,
effectively raises the boiling point of the coolant to well above 212 F (100 C).
2.
The dual thermostats help the engine warm-up quickly by remaining closed until the
coolant temperature reaches approximately 199 F (93 C). When the coolant
temperature reaches approximately 199 F (93 C), the thermostats open and
coolant is circulated through the water jacket in the engine to maintain the correct
operating temperature for the engine. Coolant is drawn from the radiator, through
the transmission oil cooler, and circulated through the cooling system by the water
pump. Heat is drawn from the radiator by the engine fan pulling air over the radiator
cooling fins.
0003 00-12
