Glossary “fifth wheel height” Definition:
1). Distance from the ground to the top of the fifth wheel when it is level and parallel with the ground. 2). The height from the frame to the top of the fifth wheel, as applies to data given in fifth-wheel literature.
What is fifth wheel?
fifth wheel
Glossary “fifth wheel” Definition:
Coupling device mounted on a truck, and used to connect a trailer. It acts as a hinge point to allow changes in direction of travel between the truck and trailer.
fifth wheel hitch
Glossary “fifth wheel hitch” Definition:
Hitch having a slotted wheel-shaped plate on a tow vehicle into which the kingpin of a fifth-wheel trailer locks to connect the trailer to the vehicle.
fifth wheel top plate
Glossary “fifth wheel top plate” Definition:
That portion of the fifth-wheel assembly that contacts the trailer bolster plate and houses the locking mechanism that connects to the kingpin.