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Section IV: Glossary
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Spade - One or more ground penetrating devices designed primarily, when
used, to stabilize rearward chassis movement.
Stabilizers - A hydraulic or manually operated leg device (i.e., outboard legs,
outriggers, or jack legs) attached to trucks to give additional support down
to the ground for improved stability.
Steering Wheel Securing Device - Used to secure front wheels in lieu of standard
steering column lock.
Stroke - The length of travel of a cylinder rod or piston.
Suction Line - A tubular connection line to convey fluid between a reservoir or
tank and the inlet of a hydraulic pump.
Supply Tank - An oil reservoir used in the hydraulic system.
Swivel Head - See Boom Head.
T
T-Hook - Attachment device used for towing.
Tail Plate - Rearmost part of the towing vehicle body.
Tail Swing - Clearance distance from center of rotation to the extreme rear
extension of the revolving superstructure.
Tie-Down Assemblies - Device(s) used to restrain cargo or vehicles (i.e., strap,
bridle, chain, or cable.)
Tie-Down Chains - Chains used to restrain cargo or vehicles.
Tilt Cylinder - Cylinders used to change the attitude of a structure or body.
Tire Clearance - Necessary space between tires and the nearest component to
allow operation of truck without damage to tires.
Tire Lift - A device used for towing vehicles by lifting one end of the towed vehicle
by the wheels.
Tow - Act of transporting a vehicle form one point to another by a second vehicle.
Towed Vehicle - The vehicle being towed.
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