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 to 18 ft with a maximum lift capacity of 20,000 lb with outriggers and boom jacks to the ground. The boom capacity depends on boom extension and placements of truck outriggers and boom jacks. With boom full out and no outriggers, the capacity is only 3000 lb. The boom elevates to 45 degrees, swings 270.
+ Boom Capacity ChartRadius With outriggers Without outriggers18 ft 4000 lb 3000 lb17 ft 4250 lb 3200 lb16 ft 4550 lb 3500 lb15 ft 5000 lb 3800 lb14 ft 5600 lb 4100 lb13 ft 6300 lb 4600 lb12 ft 7100 lb 5100 lb11 ft 8400 lb 5800 lb10 ft 10000 lb 6700 lb
The fuel consumption rate is 5 mpg. The towing capacity is 14 tons on road or 10 tons cross country (or off-road). The front winch has a 20Klb capacity and the rear winch is 45klb capacity.
These trucks were specially built for the United States Army to pull medium duty equipment through non-incorporated terrain.
References
Army Manual TM 9-2320-260-20