It carries an original engine imported from America that meets TIER 3 emission standard. It is featured in strong power, low noise, low oil consumption and low emission and can satisfy the requirements of diversified operation modes. The engine is integrated with a high pressure fuel injection system, by controlling fuel supply actuator and timing actuator, ECM can achieve pure electric control of the full fuel injection process, precisely control injection amount and time of injection, reduce fuel consumption and increase engine efficiency. Imported original hydraulic components and technologically advanced negative flow control system have not only extended service life of the entire vehicle but also improved its working efficiency; the new type main valve has a series of regenerative, convergent and prioritized functions that reduce energy consumption requirements; hydraulic oil cooling system has an independent cooling system, which can automatically control fan rotating speed according to oil temperature, reduce energy consumption and lower noises; what’s more, the fan can reversely rotate, and is convenient for the dust to be wiped off from the cooler.