TM 9-2320-269-10
GLOSSARY - CONTINUED
KELLY BAR
A hex-shaped drive shaft that attaches to the auger drive gear
case, to which the auger is attached.
LOWER CONTROLS
The hydraulic controls on the console which control the
movements of the derrick leg assembly.
MANUAL CONTROL
A control actuated by the operator, regardless of the means of
actuation. Example: lever or a foot pedal control for directional
valves.
MAST
The upright stationary section of the derrick base that supports
the rotating mechanism and turret.
MICRON
One millionth of a meter or about .00004 inch.
MICRON RATING
The size of the particles a filter will remove from the fluid.
MOTOR
A rotary motion device which changes hydraulic energy into
mechanical energy; a rotary actuator.
OPERATOR'S THROTTLE
A foot operated hydraulic power control which controls the
vehicle engine RPM from the rear console.
OUTRIGGERS
Four hydraulically powered extendible stabilizing legs. Two are
mounted on each side of the derrick sub-frame and provide a
firm stable platform when the derrick is rotated, or elevated.
POLE GUIDE
A hydraulic powered device used to manipulate the upper end of
the telephone poles being raised out of, or being lowered into
pole hole.
POWER FEED TUBE
Telescoping hydraulic line which supplies oil to the digger motor.
1-5
