Semi Truck Tractor – Red (PBR)

A semi-truck tractor, also known as a semi-tractor, truck-tractor, or simply tractor-trailer, is a type of heavy-duty truck used to pull large trailers. It forms a crucial part of a semi-trailer truck, commonly known as an "18-wheeler" or "big rig" in North America. The main purpose of the tractor is to provide the necessary power and traction to move the heavy load carried by the attached trailer.

The front portion of the semi-truck tractor, known as the cab, houses the driver and any passengers. It contains the controls, instrument panel, seats, and sleeping quarters (in some models) for long-haul drivers.

The tractor is equipped with a powerful diesel engine, typically located in the front under the hood. The engine generates the necessary torque and horsepower to move heavy loads.

Semi-truck tractors have robust transmissions, often manual or automated manual transmissions (AMTs), which allow the driver to shift gears according to road conditions and load weight.

The fifth wheel is a coupling device located on the tractor's frame, just behind the cab. It connects to the kingpin on the front of the semi-trailer, allowing for a secure and articulated connection.

Many modern semi-truck tractors are equipped with a sleeper cab, providing a comfortable resting area for long-haul truckers during overnight trips.

Semi-truck tractors use air brakes for improved stopping power, especially crucial when hauling heavy loads.

Large fuel tanks are mounted on the sides of the tractor, enabling long-range travel without frequent refueling stops.

Semi-truck tractors usually have two or three axles. The front axle is a steering axle, while the rear axles are drive axles, providing power to the wheels.

Many semi-truck tractors have air suspension systems, which help provide a smoother ride and better load stability.

Modern tractor-trailers often come with advanced safety features, such as anti-lock braking systems (ABS), stability control, collision avoidance systems, and more.

Semi-truck tractors are an essential part of the transportation industry, as they can efficiently haul heavy goods over long distances. They are commonly used for freight transportation, delivering goods from manufacturers to distribution centers, stores, or directly to consumers.

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