The operating weight of machine is heavy. The machine is steady with big capacity of bucket & powerful breakout force. Engine, torque converter and transmission are maintained easily because of being installed separately. Durable & reliable engine with great torque reserve has excellent starting performance. The simple structure of torque converter is high efficiency. The hydraulic system with single-pump & prior valve ensures only 4.5 seconds lifting time of bucket and order piping layout. Great improvement has been made on the working device for the operating force, lock function is added to the boom lifting, which greatly reduces the labor intensity of the operator. New appearance and wide-field cab ensure comfortable. The design & layout of the instrumental monitor system conform to Ergonomics. The beautiful engine hood with turnabout function ensures easy maintenance.