Search results
Results from the WOW.Com Content Network
Modern fifth wheels allow the trailers to slide into the fifth wheel and lock into it very reliably when maintained and serviced properly. The engagement of the king pin into the fifth-wheel locking mechanism is the only means of connection between tractor and trailer; no other device or safety mechanism is used.
The underside view shows the arrangement of the 18 tires (wheels). Shown in blue in the underside view are the axles, drive shaft, and differentials. The legend for labeled parts of the truck is as follows: tractor unit; semi-trailer (detachable) engine compartment; cabin; sleeper (not present in all trucks) air dam; fuel tanks; fifth-wheel ...
The towing vehicle has a wide coupling plate known as a fifth-wheel coupling bolted onto its chassis, on which the semi-trailer rests and pivots. As the tractor reverses under the trailer, a kingpin under the front of the trailer slides into a slot in the skid plate, and the jaws of the fifth wheel close onto it.
Fifth wheel Trailer: 17 to 40 ft (5.2 to 12.2 m) Uses fifth-wheel coupling centered above rear axle of towing vehicle Folding / Pop-up: Trailer: 8 to 16 ft (2.4 to 4.9 m) With collapsable sides that are stowed during towing Class A (Integrated) Motorhome: 26 to 45 ft (7.9 to 13.7 m) Typically built on heavy-duty truck or bus chassis
Thus, the weight of the vehicle tends to rotate the wheel about the kingpin back to this position. The kingpin inclination also contributes to the scrub radius of the steered wheel, the distance between the centre of the tyre contact patch and where the kingpin axis intersects the ground. If these points coincide, the scrub radius is zero.
Eyesores on Wheels. Cars in the 1950s were visually striking, and not always for good reasons. While the decade produced such enduring automotive beauties as the classic Corvette, it also gave us ...
A fifth-wheel trailer. Designed to be towed by a pickup or medium duty truck equipped with a special in-box hitch called a fifth wheel coupling. Part of the trailer body extends over the truck bed, shortening the total length of the vehicle and trailer combined.
Newer fifth-wheel hitches are pivoted in two dimensions to ease hitching up and to give the truck and trailer more freedom of movement together. Some models are called sliding-fifth-wheel hitches because the entire hitch assembly can be rolled from its forward towing position to a more rearward position for backing up and maneuvering in tight ...