TM-9-2320-387-10 HMMWV Operator Manual Download
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TM9-2320-387-l 0 1 2-21. HEATER OPERATION 1 a. b. c. d. e. Start engine (para. 2-12). NOTE Perform step b. for Ml113 models only. Push fresh air intake lever (3) forward to close grille. Turn heater fan switch (4) to desired setting, HIGH/LOW. NOTE For maximum heat, pull heater control knob all the way out. Position heater control knob (2) to desired setting. To shut off outside air, pull out control knob (1). 2-77