The design of engine and transmission system of crawler bulldozer is deeply adapted to complex operation requirements, and it is outstanding in environmental protection, reliability and economy. The engine is equipped with a common rail fuel system (MCRS). By accurately controlling the fuel injection pressure and timing, the fuel can be fully burned, which not only reduces pollutant emissions, easily meets the requirements of Euro A/ III emission, but also reduces carbon deposition and delays engine aging. The matched SECCO double pre-filtration air intake system can effectively filter dust and impurities in the air, prevent particulate matter from entering the engine, prevent the piston, cylinder and other components from premature wear, reduce early failures from the source and prolong the service life of the engine.

The torque converter adopts hydraulic transmission design with locking function, which has obvious advantages. Its output torque can be dynamically adjusted with the load, and it can automatically adapt to the resistance when facing materials with different hardness or slopes, avoiding power waste or overload, and has strong load adaptability. Hydraulic transmission is used in low-speed operation to ensure smooth power transmission, which is suitable for fine leveling and shovel loading; Switching to mechanical transmission at high speed reduces power loss, saves 10%-15% fuel compared with traditional transmission, greatly improves fuel economy and reduces long-term operation cost.