TM-9-2320-387-10 HMMWV Operator Manual Download
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TM 9-2320-387-10 Change 1 2-11 KEY ITEM AND FUNCTION 3 Radiator drainvalve (located beneath right front of engine on lower radiator crossover pipe) is turned counterclockwise to drain coolant from radiator. 4 Coolant surge tank cap (located right rear of engine) is removed from surge tank to add coolant to cooling system. 3 4