Circular metal plate secured to the tractor chassis frame, that clamps to the trailer king pin permitting the trailer to pivot. (Acts as a forward bearing plate for the trailer).
The fifth wheel is the flat circular disk at the point on the tractor of a tractor-trailer combination at which the trailer hitch is secured. This disk supports the weight of the front of the trailer
The semi-circular coupling device mounted horizontally on the back of a tractor which engages and locks with a trailer allowing the trailer to pivot and turn.
Provides a connection (flexible) between the tractor and the trailer. Pivot mounted, it contains provision for accepting and holding the kingpin of a trailer, Center of the fifth wheel should always be located ahead of the centerline of the rear axle.
A device used to couple a semi-trailer to a truck. In most F-Series models, the fifth wheel is an upper mounting on the pickup box floor The upper fifth wheel engages a trailer and consists of a plate and a rigidly mounted kingpin A lower fifth wheel mounts on a tractor frame and consists of a base, rocking plate and locking mechanism that engages the kingpin on the trailer
an extra car wheel and tire for a four-wheel vehicle
a steering bearing that enables the front axle of a horse-drawn wagon to rotate
a unique power unit designed primarily for moving and spotting trailers in truck, rail, and marine terminals
A coupling device mounted on a truck tractor (or towed) that is used to support a semitrailer through the use of a kingpin. It also acts as a pivot to allow changes in direction between the truck tractor and semitrailer when turning comers. Two types exist: fixed or sliding.
A special high platform with a coupling pin used to support and connect a trailer to a truck or a pickup bed. Also allows the trailer to pivot when turning corners.
Circular or wheel-shaped bearing mechanism, secured on the rear of the chassis of a truck-tractorm that engages the semi-trailer king pin with a spring lock device and supports the weight of the front end of the semi-trailer.
part of a coupling device mounted on tractor which engages and locks with circular steel pin on a trailer.
a coupling attached to a vehicle used for towing a trailer. A fifth wheel resembles a horizontal turntable and is sometimes used in the bed of a pick-up truck, for example, to tow a large camper trailer.
Testing equipment attached temporarily to a vehicle to determine the speed and distance covered.
The pivotal connection point between a towing vehicle and a trailer. This is always found on the back of the towing vehicle and is a large disk flat side down covered with grease.
The coupling device located on the tractor's rear frame that is used to join the front end of the trailer to the tractor.
An ironclad wheel, or portion of a wheel, placed horizontally over the forward axle of a carriage to provide a bearing giving support and stability as the front axle turns.
vehicle designed for recreational purposes to carry persons or property on its own structure and so constructed as to be drawn by a motor vehicle by means of a kingpin connecting device. (VC §432)
The unit's part of the articulation of an articulated vehicle
Load-supporting coupling table mounted to the frame of a vehicle. Pivot mounted, it provides freedom of articulation while containing provision for accepting and holding the kingpin of a trailer. The center of the fifth wheel should always be located ahead of the centerline of the rear axle.
A type of hitch that mounts in the bed of pickup truck; designed to be like hook-ups on big tractor/trailer rigs. It uses a plate in the bed of the truck, and a pin on the trailer.
The coupling on a tractor unit to which the trailer is conected.
The device which hooks the trailer to the tractor;also known as a dolly.
Coupling device attached to a tractor or dolly which supports the front of a semitrailer and locks it to the tractor or dolly. The fifth wheel's center is designed to accept a trailer's kingpin, around which the trailer and tractor or dolly pivot in turns.
The semi-circular steel coupling device mounted on a tractor which engages and locks with a chassis semi-trailer.
A coupling device mounted to a tractor or a dolly used to connect a semi-trailer and a tractor, or two semi-trailers. A semi-truck trailer is supported at the rear by its own wheels and at the front by the fifth wheel, which is mounted to a tractor or dolly.
Supporting plate and pivot at the forward end of a tractor-trailer.
A device on the rear of a truck tractor for attaching a trailer.
A device used to connect a truck tractor or converter dolly to a semi trailer in order to permit articulation between the units. It generally is composed of a lower part consisting of a trunnion, plate, and latching mechanism mounted on the truck tractor (or dolly) and a king pin assembly mounted on the semi trailer.
