A tractor unit also called as prime mover, traction unit or rig is a heavy-duty towing engine that provides motive power for hauling a towed or trailered load. The tractor unit serves as a method of moving trailers. Trailers can be swapped between tractor units quickly so the unit does not stand idle whilst the load is unloaded or loaded, unlike a rigid, and is not restricted to one type of goods as trailer types can be swapped e.g. Bulk tipper to a box van.
The combination of a tractor unit and a semi-trailer is called semi-trailer truck, tractor trailer truck, semi-tractor truck, semi-truck, trailer truck or tractor truck is usually used to carry freight.
Truck tractors or tractor come in various options such as 6x4,6x2,4x2,6x8,6x6 and 8x4. Popular brands include scania,DAF,Iveco, MAN, Mercedes-benz,Renault,Volvo etc.
If you are looking for trucks for auction or tractor units at an auction, check out a great variety of stock on Machinery Planet.
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