· A quick return line is added to the arm oil cylinder circuit, considerably improving the operating efficiency at low energy consumption.

· The newly-designed cab with much room and larger windows provides you with a wider view.Equipped with excellent sealing, the cab is free from dust, rain, and noise that effectively reduce the fatigue of operator.

· The side plates are thicker than before and the ear plates are redesigned to reduce stress at the bending. The boom has stood the durability test and field (soil and rock mixture) digging test.