LOCATION AND DESCRIPTION OF MAJOR COMPONENTS AND SYSTEMS (CONTINUED)ENGINE COOLING SYSTEMCooling air is drawn through fan well cover and forced throughradiator into engine compartment by two cooling fans. Air flowsaround engine and is exhausted through grilles on top of vehicleengine deck.Engine coolant flows from coolant pump into two-section(engine/transmission) oil cooler mounted on engine. From oilcooler cores, coolant flow is directed into engine water jacketsfor engine block cooling. At normal operating temperatures thebypass thermostat is closed and inlet thermostat is open, allow-ing coolant to circulate through the radiator. Below normaloperating temperatures, the inlet thermostat closes and the by-pass thermostat opens allowing coolant to flow through cross-overtube, bypassing the radiator.The surge tank collects and stores excess system coolant, allowingcoolant to flow back into the system as required to maintain thesystem at full level. Air trapped in the system is bled to atmospherethrough the pressure relief valve which is connected by hose to thesurge tank.The aeration detector senses low coolant level and activates a warn-ing indicator light on the operator’s instrument panel.TA3099291-13TM 9-2350-267-20
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