TM-9-2320-280-10 HMMWV Operator Manual Download
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2-156 Change 1 NOTE Runflat travel distance will improve with radial tire and rubber runflat. If additional travel is required, tire tread may be cut away from tire. Two tires flat – rear 20 mph maximum (32 kph) 30 mi (48 km) One tire flat – any location 30 mph (48 kph) 30 mi (48 km) Two tires flat – same side 30 mph (48 kph) 30 mi (48 km) Two tires flat – front only 30 mph (48 kph) 30 mi (48 km) Combination of Flat Tires Recommended Vehicle Speed Distance 2-39. ARCTIC OPERATION (ALL EXCEPT M1123 AND A2 VEHICLES) a. General. Arctic winterization kits are for use during extremely cold temperatures from 0°F (-18°C) to -50°F (-46°C). CAUTION • Do not operate arctic heater in ambient temperatures above 0°F (-18°C) or with temperature switch in “HI” position when temperature is above -25°F (-32°C). Damage to equipment may result. • Close battery box door after 30 minutes of arctic heater operation or when engine is running. Failure to do so may result in damage to batteries. 2-38. RUNFLAT OPERATIONS M998 series vehicles are equipped with runflat devices, allowing the vehicle to be driven with one or more tires flat. For runflat operations, refer to table 2-4. WARNING • Do not exceed 30 mph (48 kph) during any runflat operation. Do not exceed 20 mph (32 kph) with both rear tires flat. Loss of vehicle control will occur, causing damage to equipment, injury or death to personnel. • Speeds indicated in table 2-4 are maximum and must be reduced when traveling on secondary roads, cross-country, or with traffic present. Failure to reduce speeds could cause loss of control of vehicle, resulting in damage to equipment and injury or death to personnel. • When driving your vehicle, the existing conditions are constantly changing. Never drive at a speed greater than is reasonable and prudent for these conditions. Loss of vehicle control will occur causing damage to equipment and injury or death to personnel. CAUTION • A wheel that has been run flat must be replaced and inspected by unit maintenance as soon as possible before reuse, or damage to equipment may result. • Runflat operation may cause the tread to separate from the tire and/or wheel. If abnormal handling is experienced, or noise such as flapping or pounding around the wheel well occurs, the tread needs to be cut away from the wheel before continuing operation. Failure to do so could result in damage to the vehicle. Table 2-4. Runflat Operation TM 9-2320-280-10