AATY165 bulldozer is a new type of engineering bulldozer, which is developed by utilizing the internationally and domestically leading technologies of the same type, according to the demand of the national and the market condition. It was manufactured to bulldoze, rip, haul, transport in large and middle-size earthwork projects.AA The machine adopted the WD615T1-3B diesel engine, which was manufactured based on the technology of Austria Steyr. The engine was specially designed for bulldozer, has the characteristics of power exerting efficiently, super horsepower drive, excellent operation performance. The traveling system adopted half rigid suspension, rubber compounding insulator and fully hydraulic steering device. The gearbox installed on the machine is featured with: hydraulic gearshift, advanced hydraulic planet gear transmission. The clutch is: wet, copper base friction disc, saucer shaped spring compression, constant joint, hydraulic disjoint. The whole machine is characterized with reasonable structure, powerful drawbar pull, convenient maintenance, totally enclosed and roll-over-protective cab, wide view field, steering comfortably, nimbly and safety, good reliability, advance dynamic and economic properties, its performance has reached the advanced level at home.