TM 9-2320-269-20-1
HYDRAULIC SYSTEM - CONTINUED
OUTRIGGERS
The outriggers are extendable stabilizing legs with hydraulically powered extension cylinders mounted at the four corners
of the body. The outriggers stabilize the vehicle when operating the derrick and, if not fully extended, will not allow the
derrick to operate.
DERRICK
The derrick is heavy duty and hydraulically operated with a rotating turret, a three part beam with a powered telescoping
second section of steel, and a manually extended third section of "spirex" fiberglass. Two fiberglass baskets are attached
to the beam for holding workers. The turret is rotated by a hydraulic motor that transfers fluid pressure to mechanical
power, and the beam is raised by a hydraulically operated extending lift cylinder.
AUGER
The auger is a screw-type hole digging tool mounted to the side of the beam. It is powered by a hydraulic motor that
transfers fluid pressure to mechanical power to turn the auger blade.
HYDRAULIC LINES
The hydraulic lines are flexible hose assemblies designed to carry fluid under high pressure. They carry the hydraulic oil
from the pump to the control valves and components, and back to the reservoir.
TA228530
1-37/(1-38 BLANK)
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