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  2. Fifth-wheel coupling - Wikipedia

    en.wikipedia.org/wiki/Fifth-wheel_coupling

    A wheel would be placed on the rear frame section of the truck, which at the time had only four wheels, making the additional wheel the "fifth wheel". The trailer needed to be raised so that the trailer's pin would be able to drop into the central hole of the fifth wheel.

  3. Trailer (vehicle) - Wikipedia

    en.wikipedia.org/wiki/Trailer_(vehicle)

    A fifth wheel uses a large horseshoe-shaped coupling device mounted 1 foot (0.30 m) or more above the bed of the tow vehicle. A gooseneck couples to a standard 2 + 5 ⁄ 16-inch (59 mm) ball mounted on the bed of the tow vehicle. The operational difference between the two is the range of movement in the hitch. The gooseneck is very maneuverable ...

  4. List of recreational vehicles - Wikipedia

    en.wikipedia.org/wiki/List_of_recreational_vehicles

    Some larger fifth-wheel trailers, usually over 40 feet (12.2 m) in length and 18,000 pounds (8,200 kg) in weight, are pulled by semi-trucks. Fifth-wheel trailers have become increasingly popular since they first became commercially available in the late 1960s.

  5. Semi-trailer - Wikipedia

    en.wikipedia.org/wiki/Semi-trailer

    A tractor unit pulling a semi-trailer A truck pulling a semitrailer using a trailer dolly. A semi-trailer is a trailer without a front axle.The combination of a semi-trailer and a tractor truck is called a semi-trailer truck (also known simply as a "semi-trailer", "tractor trailer", or "semi" in the United States).

  6. Road train - Wikipedia

    en.wikipedia.org/wiki/Road_train

    A fifth wheel dolly is then affixed to the hitch allowing another standard trailer to be attached. Eleven-axle coal tipping sets carrying to Port Kembla , Australia are described as A-doubles. The set depicted has a tare weight of 35.5 t (39.1 short tons) and is capable of carrying 50 t (55.1 short tons) of coal. [ 41 ]

  7. Tow hitch - Wikipedia

    en.wikipedia.org/wiki/Tow_hitch

    Weight ratings for both bumper-mounted and frame-mounted receiver hitches can be found on the bumper of pickup trucks (for bumper-mounted tow balls) and on the receiver hitch (for frame-mounted receiver hitches). For flat deck and pickup trucks towing 10,000-to-30,000-pound (4.5 to 13.6 t) trailers there are fifth wheel and gooseneck hitches ...

  8. Semi-trailer truck - Wikipedia

    en.wikipedia.org/wiki/Semi-trailer_truck

    Conventional style cab tractor A cab-over semi-tractor Tractor with an end-dump trailer A FAW semi-trailer truck in China A semi-trailer truck (also known by a wide variety of other terms – see below) is the combination of a tractor unit and one or more semi-trailers to carry freight. A semi-trailer attaches to the tractor with a type of hitch called a fifth wheel. Other terms There are a ...

  9. Caravan (trailer) - Wikipedia

    en.wikipedia.org/wiki/Caravan_(trailer)

    Fifth wheel camper. A fifth-wheel is a travel trailer supported by a hitch in the centre of the bed of a pickup truck instead of a hitch at the back of a vehicle. The special hitch used for fifth-wheels is a smaller version of the one used on 18-wheeler trucks and can be connected by simply driving (backing) the tow vehicle under the trailer ...