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An M816 wrecker being pulled by another M816. The M816 Medium Wrecker is part of the M809 series of 5-ton 6x6 military trucks.It was made by AM General starting in 1970. It has a revolving hydraulic crane with an extending boom that can extend from 10–18 ft with a maximum lift capacity of 20,000 lb with outriggers and boom jacks to the ground.
There are also several sizes and weight categories of tow truck. The lightest models are usually based on light truck and van chassis offering boom and tow weights of around 5 to 10 short tons (4.5–9.1 metric tons), making them ideal for car towing. Medium-duty tow trucks have a boom capacity of 15 to 20 short tons (14–18 metric tons).
Medium wrecker trucks were used to recover disabled or stuck trucks and lift large components. A rotating, telescoping, and elevating hydraulic boom could lift a maximum of 20,000 lb (9,100 kg). Although the truck was not meant to carry a load, the boom could support 7,000 lb (3,200 kg) when towing. [34] [35] [36]
The company expanded from a workforce of 300 and an annual production of 45 cranes in 1850, to almost 4,000 workers producing over 100 cranes per year by the early 1860s. [42] Armstrong spent the next few decades constantly improving his crane design; his most significant innovation was the hydraulic accumulator. Where water pressure was not ...
The M39 series 5-ton 6×6 truck 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.
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