TM-9-2320-280-10 HMMWV Operator Manual Download
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TM 9-2320-280-10 KEY ITEM AND FUNCTION 5 Radiator drainvalve (located beneath right front of engine on lower radiator crossover pipe) is turned counterclockwise to drain coolant from the radiator. 6 Coolant surge tank cap (located right rear of engine) is removed from surge tank to add coolant to cooling system. 2-9