TM 9-2320-387-24-l
1 l-20. COOLING SYSTEM OPERATION (Cont’d)
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FAN - Pulls outside air through radiator to remove heat from coolant.
HYDRAULIC
CONTROL VALVE - Directs hydraulic fluid to provide required pressure to actuate
fan clutch as required by engine temperature. Hydraulic pressure is supplied by power steering
pump.
TIME DELAY MODULE - Sends delayed signal to fan clutch solenoid for delay of fan actuation to
provide needed horsepower for engine acceleration.
FAN CLUTCH SOLENOID - Actuates hydraulic control valve as required by coolant temperature.
WATER PUMP - Driven by serpentine belt, provides circulation of coolant through cooling system.
FAN CLUTCH - Hydraulically actuated by pressure from hydraulic control valve to control
operation of fan. Hydraulic pressure is supplied by power steering pump.
DR.AINVAIXE - Draining point for radiator and cooling system.
RADIATOR SHROUD - Permits a greater concentration of air to be pulled through the radiator.
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