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  2. Fifth-wheel coupling - Wikipedia

    en.wikipedia.org/wiki/Fifth-wheel_coupling

    The fifth-wheel coupling provides the link between a semi-trailer and the towing truck, tractor unit, leading trailer or dolly. The coupling consists of a kingpin , a 2-or- 3 + 1 ⁄ 2 -inch-diameter (50.8 or 88.9 mm) vertical steel pin protruding from the bottom of the front of the semi-trailer, and a horseshoe-shaped coupling device called a ...

  3. Tow hitch - Wikipedia

    en.wikipedia.org/wiki/Tow_hitch

    A lunette ring is a type of trailer hitch that works in combination with a pintle hook on the tow vehicle. A pintle hook and lunette ring make a more secure coupling, desirable on rough terrain, compared to ball-type trailer hitches. It is commonly seen in towing applications in agriculture, industry, and the military. [citation needed]

  4. 6-ton 6×6 truck - Wikipedia

    en.wikipedia.org/wiki/6-ton_6×6_truck

    The body had 4 self-sealing tank compartments for a total of 2,000 US gal (7,600 L). A bow and canvas top was fitted, so the truck could be disguised as a common cargo truck. Early trucks had a hard cab and a front-mounted pintle hitch, later trucks had an open cab and a 25,000 lb (11,000 kg) front winch.

  5. 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 ...

  6. Towing - Wikipedia

    en.wikipedia.org/wiki/Towing

    Other familiar forms are the tractor-trailer combination, and cargo or leisure vehicles coupled via ball or pintle and gudgeon trailer hitches to smaller trucks and cars. In the opposite extreme are extremely heavy duty tank recovery vehicles , and enormous ballast tractors involved in heavy hauling towing loads stretching into the millions of ...

  7. Pintle - Wikipedia

    en.wikipedia.org/wiki/Pintle

    Pintle and gudgeon rudder system. Part 2 is the pintle, and part 3 is the gudgeon. Several examples of pintles as part of door hinges. A pintle is a pin or bolt, usually inserted into a gudgeon, which is used as part of a pivot or hinge. Other applications include pintle and lunette ring for towing, and pintle pins securing casters in furniture.