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Section IV: Glossary
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Towing - See Tow.
Tow Bar - A device for positioning a towed vehicle behind a towing vehicle.
Tow Chain - Length of chain used to connect the sling with the towed vehicle.
Tow Sling - A device used for lifting and towing vehicles with a partial load
supported on rubber straps.
Tow Vehicle - Vehicle used to lift-tow other vehicles.
Towing Light/Bar - See Auxiliary Towing Lights.
Trailer 5th Wheel Plate - A plate attached to a tow truck-lifting device that captivates
the kingpin on trailers allowing a trailer to be towed in the same manner as
intended by the trailer manufacturer.
U
Underlift - A device used for towing vehicles by lifting one end of the towed
vehicle from under the axle or structural member.
Unloaded Vehicle Weight - The weight of a vehicle with maximum capacity of all
fluids necessary for operation of the vehicle, but without cargo or occupants.
Also referred to as curb weight.
V
Valve - A device which controls fluid flow direction, pressure, or flow rate.
VIN (Vehicle Identification Number) - The number assigned to a vehicle by the
manufacturer primarily for registration purposes. It may consist of numerals,
letters, or a combination thereof.
W
WARNING - A signal word used when a potentially hazardous situation exists
and could result in death or serious injury.
Weight Distribution - The portion of total weight of the vehicle on each axle.