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  2. Fifth-wheel coupling - Wikipedia

    en.wikipedia.org/wiki/Fifth-wheel_coupling

    The term fifth wheel comes from a similar coupling used on four-wheel horse-drawn carriages and wagons. The device allowed the front axle assembly to pivot in the horizontal plane, to facilitate turning. 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 ...

  3. De Dion suspension - Wikipedia

    en.wikipedia.org/wiki/De_dion_suspension

    De Dion rear axle. A de Dion axle is a form of non-independent automobile suspension. It is a considerable improvement over the swing axle, Hotchkiss drive, or live axle. [1] Because it plays no part in transmitting power to the drive wheels, it is sometimes called a "dead axle". [2]

  4. ISO standards for trailer connectors - Wikipedia

    en.wikipedia.org/wiki/ISO_standards_for_trailer...

    7-pin ISO 1724 trailer connector type 12N (Towing vehicle side). This connector uses a mix of pin and socket terminals. Physical design according to standard ISO 1724. [4] [8] The 7-pin connector uses all 7 pins on newer trailers according to the ISO standard. [9] [10] On older trailers there's sometimes a 5-wire setup using a 7-pin connector.

  5. List of railroad truck parts - Wikipedia

    en.wikipedia.org/wiki/List_of_railroad_truck_parts

    An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.

  6. GM 10.5-inch 14-bolt differential - Wikipedia

    en.wikipedia.org/wiki/GM_10.5-inch_14-bolt...

    The 10.5" 14-bolt differential and axle is quite popular with Jeep Wrangler owners who want to upgrade their standard Dana 30, Dana 35, or Dana 44 axle. While the 10.5" 14-bolt axle is heavier than the standard Dana axles offered on the Wrangler, it is much stronger.

  7. Dolly (trailer) - Wikipedia

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

    Semi-trailer – 1 axle (2 wheels), without the front axle but have a landing gear. Large semi-trailer of truck size is designed for connection via the fifth wheel on the tractor unit or the semi-trailer truck. Small semi-trailer such as travel trailer and boat trailer is designed for connection via a tow hitch of a passenger vehicle. Either ...