TM-9-2320-387-10 HMMWV Operator Manual Download
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TM 9-2320-387-10 1 3-23. EMERGENCY FAN CLUTCH OVERRIDE 1 a. The radiator fan normally activates when engine temperature exceeds 220°F (104°C) and deactivates when engine temperature drops to 190°F (88°C). If overheating occurs in an emergency situation, this procedure will ensure continuous fan operation. b. C. d. e. f. Raise and secure hood (para_ 3-9). Step engine (para. 2-14) prior to disconnecting time delay module. Disconnect time delay module connector (1) from control valve connector (2). Start engine (para. 2-12). Check fan for continuous operation. If fan is not operating continuously, stop - ..e. . . . , engine ana notny unit mamtenance. g. Lower and secure hood (para. 3-9). h. Allow engine to cool at idle until engine temperature lowers to normal operating temperature of 190”-230°F (88”-110°C). i. Proceed to unit maintenance with vehicle. Ensure unit maintenance is notified of emergency service performed on vehicle. 3-26