TM-9-2320-387-10 HMMWV Operator Manual Download
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TM 9-2320-387-10 2-112 2-46. OPERATING IN RAINY OR HUMID CONDITIONS a. General. Materiel inactive for long periods during rainy or humid conditions can rust rapidly. Fungus may develop in the fuel tanks as well as on soft tops, seats, and other components. Frequent inspections, cleaning, and lubrication are necessary to maintain the operational readiness of vehicles. b. Before Operation. Fuel filter must be drained frequently because of high condensation in fuel system. To drain fuel filter, refer to para. 3-11. c. During Operation. (1) If necessary, place transfer case shift lever in H/L (high/lock range) to start without spinning wheels. (2) Do not spin wheels when placing vehicle in motion in heavy rain. (3) Refer to para. 2-40 for techniques that can be used when operating on unusual terrain. 2-47. SHALLOW WATER FORDING OPERATION a. General. The vehicles have a 30 in. (76 cm) shallow water fording capability. CAUTION Never attempt shallow water fording unless water depth is known to be 30 in. (76 cm) or less, and bottom is known to be hard. Do not exceed 5 mph (8 kph) during fording operation. Damage to vehicle may result. b. Before Operation. (1) Ensure oil dipstick, transmission dipstick, oil filler cap, and fuel tank cap are secure. (2) Secure all loose objects on vehicle. (3) Ensure battery caps are all present and tight. (4) Place transfer case shift lever in H (high range). c. During Operation. (1) Enter water slowly and maintain even vehicle speed while fording. (2) Exit water in area with gentle slope.