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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. Fifth wheels were originally not a complete circle and were hand forged.

  3. Continuous track - Wikipedia

    en.wikipedia.org/wiki/Continuous_track

    Continuous tracks on a bulldozer A dump truck with continuous track wheels crosses a river and dumps its load in Kanagawa, Japan. An agricultural tractor with rubber tracks, mitigating soil compaction A Russian tracked vehicle designed to operate on snow and swamps A British Army Challenger 1 tank

  4. Turning radius - Wikipedia

    en.wikipedia.org/wiki/Turning_radius

    Diagram of turning vehicle. On wheeled vehicles with the common type of front wheel steering (i.e. one, two or even four wheels at the front capable of steering), the vehicle's turning diameter measures the minimum space needed to turn the vehicle around while the steering is set to its maximum displacement from the central 'straight ahead' position - i.e. either extreme left or right.

  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. Semi-trailer - Wikipedia

    en.wikipedia.org/wiki/Semi-trailer

    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). [1] A large proportion of a semi-trailer's weight is supported by a tractor unit, or a detachable front-axle assembly known as a dolly, or the tail of another trailer ...

  7. File:Conventional 18-wheeler truck diagram.svg - Wikipedia

    en.wikipedia.org/wiki/File:Conventional_18...

    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 ...

  8. Farmall Regular - Wikipedia

    en.wikipedia.org/wiki/Farmall_Regular

    An experimental model was developed in 1920. By 1923, prototypes of the rear-wheel-drive tractor with narrow front wheels were working crops. Production began in 1924, with tractors selling for $825. Tractors were marketed with a range of attachments for various duties. A power take-off turning at 535 RPM was standard, along with a belt drum ...

  9. Tractor - Wikipedia

    en.wikipedia.org/wiki/Tractor

    The Ford N-series tractor helped revolutionize modern mechanized agriculture with its Ferguson three point hitch. A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction.