Domestic hydraulic excavator with a large gap between overseas, which we have to admit that a large number of early domestic introduction of foreign technology joint production of excavators, want to buy second-hand excavator market for technology, with little success. This is the same boat and China's auto industry, saying the basis of the decision height, I think that the main cause of the gap between the country's industrial base! The design and manufacture of hydraulic excavators requires a strong industrial base as a guarantee, and our industry started late because of historical reasons, basic scientific research can not keep Excavators, resulting in China's hydraulic excavator is always a step, but this river. In addition, the hydraulic excavator manufacturing also involves special materials, complex components casting, precision machining, sintering copper surface, surface heat treatment, high-performance seals, hydraulic integration technology engineering and so on. Third, check the four area, the first observation wheels, guide wheels, rollers, pulleys and crawler asked whether there wear. Second, check the chain is not original, the chain on top of the flag. If this flag and machine information corresponding to explain the chain is original, if not consistent, proven chain is replaced by the sale of second-hand excavator, the machine may wear more serious, so be careful to buy a small second-hand excavator price, finally, check the two walking motor, whether during walking speed is the same, if a fast and slow it proves there is a problem, the wheel tracks and each work is also required a closer look at the car look lower row of branch support is badly worn wheels, because the maintenance costs are very high chassis. Komatsu excavator price, Gansu used excavators, used excavators sold by Kim Ho Jin Hao Used Construction Machinery Co., Ltd. Shanghai. Used Construction Machinery Co., Ltd. Shanghai Jin Hao (www.jinhaosh.cn) strong, credible, in Shanghai Minhang District of mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead jinhao Excavators and you hand into the brilliant, for a better future!