TM 9--2350--292--20--1
0005 00--11
THEORY OF OPERATION -- CONTINUED
0005 00
WINCH AND SPADE ASSEMBLIES -- CONTINUED
Hoist Winch 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 using
3/4--inch (19.0 mm) steel cable (3). The hoist winch (1) is wound with 225 feet (68.58 m) of steel cable (3).
1
2
3
FORWARD
Hoisting Boom The hoisting boom (1) is a rectangular--tube, modified A--frame and is pivot--mounted to the top
front 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 the
hull. 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). The
hoisting boom (1) is used in conjunction with the hoist winch (8) and 35--ton (31.75 t) hook block (9).
FORWARD
2
8
5
4
3
6
7
1
9
