HOISTING BOOM ASSEMBLY
The hoisting boom assembly (Figure 9) consists of a tubular steel A-frame, two boom-actuating cylinders and two stayline
cylinders. The A-frame, or boom (Figure 10A), is installed on top of the vehicle hull and is raised or lowered by means of
controls within the crew compartment. The boom actuating cylinders (Figure 10B) are located within the vehicle on either side
of the crew compartment. They are single-end rod, double-acting hydraulic cylinders which extend to raise the boom and retract
to lower it. The two stayline cylinders (Figure 10C) are identical to the boom cylinders and are located at the rear of the vehicle.
They work in unison with the boom cylinders to provide four feet of back-and-forth boom travel in the raised position.
Figure 9. Hoisting Boom Assembly--Right-Rear View.