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Figure 1-14. Fuel System (Cont)
Figure 1-15.   Cooling System (Cont) - TM-9-2320-366-34-1_84

TM-9-2320-366-34-1 M1078 Series 2 1/2-Ton 4x4 Light Medium Tactical Vehicles (LMTV) Manual
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TM 9-2320-366-34-1 1-13.   COOLING SYSTEM Figure 1-15.   Cooling System a.     Cooling  System. The  pressurized  cooling  system  protects  the  engine,  transmission,  and  air  compressor  by providing a means of dissipating heat generated during operation of the vehicle.  The radiator pressure cap (1, Figure 1-15), in combination with the ethylene glycol-based antifreeze, effectively raises the boiling point of the coolant to well above 212  F (100  C).   The thermostat (2), located in a housing on the right side of the engine, helps the engine to warm up quickly by remaining closed until the coolant temperature reaches approximately 180 F (82 C).   When the coolant reaches 199 F (93 C), the thermostat is fully open and coolant is circulated through the water jackets in the engine to maintain the correct operating temperature for the engine.   Coolant is drawn from the radiator (3), through the transmission oil cooler (4), and circulated throughout the cooling system by the water pump (5).  The water pump, located on the front of the engine toward the right side, is driven by two V-belts from the crankshaft pulley. 1-20







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