1-15. TRACTOR WRECKER TRUCK W/W: M819
a. Purpose of the Vehicle. The M819 tractor wrecker truck has a hydraulically-
powered, engine-driven crane, a front winch equipped with a level winding device, and a
fifth wheel for pulling a trailer. The crane, which can be extended from 11-1/2 to 26 feet
(3.51 to 9.93 meters), is used for lifting loads up to 20,000 pounds (9,080 kilograms). The
vehicle is used for freeing mired vehicles, lifting materials for loading and unloading
operations, and for towing trailers.
b. Performance. The M819 tractor wrecker truck has a hydraulically-operated crane
with three position booms, capable of 270 degrees rotation and approximately 45
degree elevation. A fifth wheel, or semitrailer coupler, is mounted on rear of M819
tractor wrecker truck. The base of the fifth wheel pivots on a walking beam which pivots
on the subbase. This construction permits the fifth wheel to move in all planes. The front
winch is used to free vehicle should it become mired.
c. Load Test. The crane must be load tested on an annual basis in accordance with