MIL-T-740 Trucks; 5 Ton, 6X6, Military Design, M39, M39A1, M39A2 And M809 SeriesThis specification covers general and special purpose 5 ton, gasoline, multi-fuel, and diesel engine powered, six-wheel, six-wheel drive, military design truck chassis, trucks, and truck tractors having single front and dual rear wheels.

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MIL-T-740G

3.4.1 Special kits. With special kits installed, vehicles shall meet the specified requirements

(see 3.3.1 through 3.3.1.7).

3.4.2 Environmental. The vehicle(s) shall operate under extreme conditions of weather and ambient air temperature ranging from minus 25°F to plus 115°F, and with special equipment installed (see 3.3.1.2), at temperature ranges of minus 25°F to minus 60°F. The complete vehicle when in storage shall withstand a temperature of minus 65°F to plus 160°F without deterioration that may cause failure of any component part of the vehicle.

3.4.3 Vehicle loading. Vehicle performance requirements shall be demonstrated with the specific vehicle loaded as specified in table V, VI, or VII; with full complement of fuel, lubricant, and coolant; with driver and assistant driver or equivalent weight of 200 pounds each; with winch assembly or 860 pounds equivalent weight mounted at the front of the vehicle to simulate mounting of winch; with soft-top cab, and with full vehicular equipment. Vehicle weight shall not include tire chains, metal cab enclosures or special equipment kits.