TM 9--2350--292--20--10005 00--11THEORY OF OPERATION -- CONTINUED0005 00WINCH AND SPADE ASSEMBLIES -- CONTINUEDHoistWinch The hoist winch (1) is mounted in the winch compartment and is gear--driven by a hydraulic motor(2). The winch (1) is capable of hoisting a 70,000 pound (31,780 kg) maximum load with a four--part line using3/4--inch (19.0 mm) steel cable (3). The hoist winch (1) is wound with 225 feet (68.58 m) of steel cable (3).123FORWARDHoistingBoom The hoisting boom (1) is a rectangular--tube, modified A--frame and is pivot--mounted to the topfront of the vehicle. The boom (1) is raised or lowered by two hydraulically operated boom cylinders (2). In operat-ing position, the boom (1) is supported by a stayline cable (3) secured to crank arms (4) located at the rear of thehull. The crank arms (4) control the live--boom movement by means of hydraulically operated stayline cylinders (5).In lowered position, the boom (1) is secured on the boom support assembly (6) by a boom travel lock (7). Thehoisting boom (1) is used in conjunction with the hoist winch (8) and 35--ton (31.75 t) hook block (9).FORWARD2 85436719
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