For all major components such as engines excavator, variable pump, motor, all kinds of control valves, adopt energy-efficient, progressive power approach. The current plan to get power to match the successful use of various energy-saving plan. Mostly in one part of the total energy transfer excavator chain "an engine of a hydraulic system, a bucket load" complete power to match the used excavators, the main engine of a pump power matching and power matching pump a load control program. Completion of a pump engine power to match the hydraulic excavator used excavators trailers, mainly progressive pump on the engine output power absorption capacity, perhaps in the selection of torque control pump speed sensing control to complete an engine under an exact match. The engine power absorbed by the pump as much as possible into hydraulic energy, energy saving effect complete. More extensive use of hydraulic control for the pump to match a load power plan in the load sensing control, load flow control Yuchai used excavators, both through the conditioning variable pump swivel angle changes make the demand flow output flow relative to the actuator match. Then cut overflow lost and lost savings. Multiple hydraulic device that can be installed into a demolition machine, grab feeder, pile extractor. Excavator three main parameters: operating weight (mass), and bucket capacity and engine power. Used excavator local second-hand excavators, English translated "Used Excavator", which means "the use of excessive excavation machine." Engineering machinery profession, often think, no longer than 250 hours use (as to explore the inner board computer records the data subject using hours), the end of the run-in period conservation programs; and clear property right machine; the machine can be supplied factory files (such as quality assurance, etc. ), equipment invoices (financing the purchase of equipment invoices monthly repayment) of the excavator, defined as "second-hand excavator." Used equipment excavation industry appears to boost vocational carried mall. 2 hand excavator, used excavators (online consultation), Tianjin used excavators provided by Shanghai Used Construction Machinery Co., Ltd. Jin Hao. Shanghai Jin Hao Used Construction Machinery Co. (www.jinhaosh.cn) is the Shanghai Minhang District, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Kim Ho used excavators in leadership with the staff warmly welcome all inquiries negotiations to create jinhao used excavators better future.