COOLING SYSTEM -680640039

TM 5-2420-224-20-1

COOLING SYSTEM

The coolant heated in the engine is circulated through the cooling system by an engine-driven

coolant pump. The coolant is cooled in the coils of the radiator and any overflow is received in

the expansion tank. The crankshaft-driven fan blows air through the radiator coils to aid cooling.

The thermostat automatically regulates engine temperature by regulating the flow of heated coolant

to the radiator.

ELECTRICAL SYSTEM

Alternator. The alternator is belt-driven at a speed sufficient to provide the electrical energy for

the normal demands of the electrical system. Some of this energy is used to keep the batteries

charged.

Starter Motor. The starter motor is located on the left rear side of the engine. It is activated

by the start switch when the MASTER disconnect switch and power switch are on and the clutch

is fully depressed.

Batteries. The two lead-acid batteries are mounted in a battery box located on the left side

beneath the rear of the cab near the air reservoir tanks. The batteries provide electrical power to

start the engine and supply power to the auxiliary circuit when the engine is stopped. A

NATO-type slave receptacle is located next to the battery box to provide capability for a jump start

from an auxiliary source if the batteries are too low to start the engine.

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