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In the late 1970s the M809 series 5-ton (4,536 kg) 6x6 trucks, based on a 1949 design, were becoming old and mechanically dated. It was still a useful type, with 35,000 in service. A "Product Improvement Package" was developed to rebuild and update the M809 series into the M939 series.
M54 (M39 series) M813 (M809 series) M923 (M939 series) The 5‑ton 6x6 truck , officially "Truck, 5-ton, 6x6", was a class of heavy-duty six-wheel drive trucks used by the US Armed Forces . The basic cargo version was designed to transport a 5-ton (4,500 kg) load over all roads and cross-country terrain in all weather.
The M809 Series 5-ton 6x6 truck was a family of heavy tactical trucks built for the United States Armed Forces. The basic cargo version was designed to transport a 5-ton (4,500 kg), 14 ft (4.3 m) long load over all terrain in all weather. In on-road service the load weight was doubled. Built by AM General, they evolved into the M939 Series.
Size of this preview: 800 × 408 pixels. ... Direct Support, and General Support Maintenance Manual for Truck, 5-ton, 6x6, M939, M939A1, M939A2 Series Trucks (Diesel)
Many M39 series were equipped with a front-mounted 20,000 lb (9,100 kg) Garwood winch, intended for self-recovery. A winch weighed 714 lb (324 kg) and added 15 + 1 ⁄ 2 in (39 cm) inches to the length of the truck. [8] [9] The M39 series had both single- and dual-rear-tire models; very few single-rear-tire trucks were built.
M939 5-ton 6x6: NH250 [6] 855 cu in (14.0 L) D: I6: 240 hp (179 kW) @2100rpm: 685 lbf⋅ft (929 N⋅m) @1500rpm: M809 5-ton 6x6), M939 5-ton 6x6: NTC400 [7] 855 cu in (14.0 L) D: TC I6: 400 hp (298 kW) @2100rpm: 1,150 lbf⋅ft (1,559 N⋅m) @1500rpm: M915 series 6x4, 6x6, 8x6: V8-300 [8] 785 cu in (12.9 L) D: V8: 300 hp (224 kW) @3000rpm: 580 ...
The U.S. Environmental Protection Agency on Wednesday granted California its request to enforce vehicle emissions standards stricter than federal rules, including the state's ban on sales of new ...
6-ton 6x6 [10] 1941–1945: 219,882: Bridge, crane, cargo fire, van and others by 5 manufacturers Mack NM 6-ton 6x6: 1940–1944: 8,400+ Prime mover cargo truck Mack NO 7 + 1 ⁄ 2-ton 6x6: 1943–1945: 2,050: Prime mover cargo truck M1 Wrecker 10-ton 6x6 [11] 1941–1945: 5,765: Standard heavy wrecker during WWII Built by Ward LaFrance and ...