M39 series 5-ton 6×6 truck
| M39 series 5-ton 6×6 truck | |
|---|---|
M54 cargo truck | |
| Type | 5-ton 6×6 truck |
| Place of origin | United States |
| Production history | |
| Designer | International Harvester |
| Manufacturer | Diamond T, International Harvester Kaiser/Kaiser-Jeep, Mack |
| Produced | 1951–1965 |
| Specifications (M54 w/winch) | |
| Mass | 19,945 lb (9,047 kg) (empty) |
| Length | 24 feet 11 inches (7.59 m) |
| Width | 8 feet 1 inch (2.46 m) |
| Height | 9 feet 8 inches (2.95 m) |
| Engine |
224 hp (167 kW) The -A1 upgrade had a Mack ENDT-673, a 673 cu in (11.0 L) turbocharged inline 6 cylinder diesel engine developing 210 hp (160 kW) at 2100 rpm. The -A2 upgrade had a Continental LDS-465-1A, a 478 cu in (7.8 L) turbocharged inline 6 cylinder developing 175 hp (130 kW) at 2100 rpm. |
| Transmission | 5 speed X 2 range trf. case |
| Suspension | Live beam axles on leaf springs |
Operational range | 280 mi (450.6 km) |
| Maximum speed | 52 mph (84 km/h) |
The M39 series 5-ton 6×6 truck (G744) was a family of heavy tactical trucks built for the United States Armed Forces between 1951 and 1965. 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.
The M39 series was the primary heavy truck of the U.S. Army and U.S. Marine forces during the Vietnam War, and was also used by the U.S. Navy, U.S. Air Force, and ARVN forces.
The M39 series began to be replaced by the M809 series in 1970, followed by the M939 series in 1982, but continues to serve in other nations' armed forces around the world.