Excavator began work normally used mini excavator market, but suddenly there will be side tracked and can not move the arm fatigue import of used mini excavators, what reason? The reason is that most of the hydraulic oil is not clean, tiny dirt clogged security a valve in the middle of the smaller piston orifice. You can remove the safety valve to clean, remove the orifice clogging it. The inspection orifices are not blocked, the pressure relief valve is still why not tune up? This situation is due to the majority of the cone valve seat closed lax, allowing hydraulic C chamber not be established. Mini excavator first appeared in the mid-1980s personal Used Mini excavators, now there are a lot of old equipment models do not have the characteristics, so users need to know in advance what they want, with the features and machine parts. Hydraulic servo control lever joystick better than the old-fashioned, sometimes not bulldozing plate is standard; of course, the user may want to find a piece of equipment with a hinged boom, it is easy to close buildings and auxiliary pipeline operations; zero tail swing For those who need a compact construction environment, it is particularly important to work. Used Mini excavator market, Jin Hao used excavators, used mini excavators Jiaxing provided by Shanghai Jin Hao Used Construction Machinery Co., Ltd .. Used Construction Machinery Co., Ltd. Shanghai Jin Hao (www.jinhaosh.cn) is Shanghai Minhang District, a leader in mining machinery, 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 Excavators in leadership with the staff warmly welcome all inquiries negotiations to create jinhao Excavators a better future.