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2. Drawbar (haulage) - Wikipedia

   en.wikipedia.org/wiki/Drawbar_(haulage)

   A large ballast tractor pulling a load using a drawbar General duty tow hitch from VBG on a truck and a drawbar on a trailer, showing a connected drawbar eye Rockinger drawbar coupling, in which the drawbar eye gets locked. A drawbar is a solid coupling between a hauling vehicle and its hauled load. Drawbars are in common use with rail ...

3. Ballast tractor - Wikipedia

   en.wikipedia.org/wiki/Ballast_tractor

   Hayes WHDX 70-170 6×6 tractor. A ballast tractor is a specially weighted tractor unit of a heavy hauler combination. It is designed to utilize a drawbar to pull or push heavy or exceptionally large trailer loads which are loaded in a hydraulic modular trailer.

4. Three-point hitch - Wikipedia

   en.wikipedia.org/wiki/Three-point_hitch

   Adjustable three-point ball on lift arm. Ball may be rotated to fit either Category I or Category II implements Rear three-point hitch of a Case IH tractor with implement attached by the drawbar. There are five different hitch sizes, called categories. The higher category hitches have sturdier lift arms and larger connector pins. [2]

5. Towing - Wikipedia

   en.wikipedia.org/wiki/Towing

   Towing of cars and trucks is a unique form, with a job sector dedicated to it. Specialized "tow truck" vehicle types are most often used. [6] Some of these are flatbed, with hydraulic tilting beds and winches and dollies to position the car behind the bed and pull it up onto the bed (flatbed towing).

6. 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 ...

7. Trailer (vehicle) - Wikipedia

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

   The trailer ball is mounted to the rear bumper or to a draw bar, which may be removable. The draw bar is secured to the trailer hitch by inserting it into the hitch receiver and pinning it. The three most common types of couplers are straight couplers, A-frame couplers, and adjustable couplers. Bumper-pull hitches and draw bars can exert ...