Bulldozers are complex machines made up of various parts including engine, chassis, hydraulic components, tracks, and a large front blade. The engine is responsible for the machine’s weight and is cooled by a multifunctional system. The tracks and blade are distinct parts that allow the machine to operate in soft ground and move large amounts of debris. Hydraulic cylinders control the blade’s movement, and new models often incorporate computer-aided functions for precise finish work.
Many different bulldozer parts are required to make a complete machine. Engine parts, chassis and hydraulic parts make up some of the more complex components of the bulldozer. The blade, tracks, and control levers are different parts of the bulldozer that are unique to this type of earthmoving. Some parts that are very similar or resemble parts used on other types of heavy equipment are the seat, muffler, and hydraulic cylinders. Being made up of many solid steel components, the bulldozer is often one of the heaviest pieces of construction equipment found on the typical construction site.
The large diesel engine contributes a large part to the bulldozer’s weight. The heavy cast iron engine block contains water passages to allow coolant from the radiator to be pumped through the engine by the water pump. This provides cooling for the rotating crankshaft, pistons and connecting rods. The radiator on a bulldozer is often responsible for cooling not only the machine’s engine, but also the hydraulic fluid, engine oil, and transmission fluid. This multifunctional system is one of the most important of all components.
Some of the most notable and distinct of all the different bulldozer parts are the tracks and the large front blade. Created by connecting many sections of heavy steel together with solid steel pins, tracks allow the bulldozer to operate in soft ground while providing traction. The large blade is mounted on heavy arms and allows the machine to push huge amounts of dirt, rock and debris. The blade also contains one often overlooked component of the many different parts: the cutting blade. Attached to the underside of the bulldozer’s large front blade, the cutting blade is a replaceable steel strip that ensures a smooth, straight cut from the large blade.
Moving the heavy blade up, down and sometimes tilting it back and forth is done by large hydraulic cylinders. With pressurized hydraulic fluid fed into the cylinders by the hydraulic fluid pump, the operator controls the movement of the blade through the manipulation of several control levers mounted in the operator compartment. New bulldozer models often incorporate blade controls, along with transmission and steering controls, on a single joystick mounted next to the operator’s seat on the machine. Optional computer aided functions designed to interact with many of the different parts of the bulldozer allow the machine to produce nearly perfectly level finish work.
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