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 TM 5-2410-237-23
THEORY OF OPERATION - CONTINUED
0003 00
ENGINE COOLING SYSTEM
NOTE
Refer to WP 0064 00 for more detailed Cooling System theory of operation information.
1.
Radiator Filler Cap. The filler cap allows access to service cooling system. A pressure relief valve on top of the radiator
controls pressure in the cooling system.
2.
Radiator. A sealed pressure type in which coolant flows through the inside of the core. The coolant is cooled in the core
by the action of air flowing around the radiator fins.
Inlet Line for Radiator. Provides a passage for the coolant to return to the radiator to be cooled.
3.
4.
Water Temperature Regulator. Controls the temperature of the coolant by restricting the amount of coolant flow to the
radiator. When the engine is cold, the regulator will stop the flow of coolant to the radiator and allow the coolant to recir-
culate in the cylinder block until it is warm. When the coolant warms, the regulator will open and allow the coolant to
flow through the radiator. This process helps maintain a steady engine temperature.
5.
Engine Oil Cooler. Coolant flows through one chamber and lubricating oil through another. The coolant lowers the lubri-
cating oil temperature.
Inlet Line for Water Pump. Provides passage for the coolant from the radiator to the water pump.
6.
7.
Water Pump. Pushes the coolant through the cooling system.
8.
Bonnet. Provides a passage for coolant between the engine oil cooler and the transmission oil cooler.
Transmission Oil Cooler. Reduces the temperature of the transmission oil by transferring the heat of the oil to the engine
9.
cooling system.
10. Fan. Driven by two V-belts from a pulley on the crankshaft. The fan forces air to circulate around the radiator cooling
fins. This action helps reduce the temperature of the coolant.
INLET LINE
RADIATOR
WATER TEMPERATURE
FOR RADIATOR
REGULATOR
FILLER CAP
ENGINE OIL
COOLER
RADIATOR
BONNET
FAN
387-054
WATER PUMP
INLET LINE FOR
TRANSMISSION
WATER PUMP
OIL COOLER
0003 00-6
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