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Bulldozers  are one of the main machinery of earth-moving engineering machinery, which are divided into crawler type and tire type according to the walking mode. Because there are fewer tire type bulldozers. The following mainly describes the structure and working principle of the crawler bulldozer. The development and expansion of bulldozer products must not only meet the work adaptability of different working conditions, but also maintain the maximum versatility of parts and components with the basic model, which brings great convenience to the majority of users. In order to facilitate users to purchase accessories, the manufacturers have retained the part numbers of Komatsu Company of Japan, and only the parts designed by themselves in the modification are named by their own manufacturers.   Bulldozers Bulldozer Structure  Crawler Bulldozer  is mainly composed of engine, transmission system, working device, electrical part, cab and hood. Among them, the mechanical and hydraulic tran