Buy Used excavator should pay attention to the car body welding, look carefully there is no crack and non-original manufacturer welding traces left Xining excavator used Hyundai excavators, these things illustrate machine has been excessive use. There is also a good method is to use a candy bar on the rear arm and arm positions used Hyundai excavators Zhengzhou, to see if there are misplaced or distorted. Pay particular attention to the excess steel repair. There may be some scratches and dents on the second phone, but if there is too much on the machine when the patch might mean this device has been used for a long time. Excavators at the start of work, but there will be side tracked suddenly can not move and digging arm fatigue, is the reason? The reason is that the majority of hydraulic oil is not clean, tiny dirt clogging the valve piston in the middle of a small orifice . Remove the valve can be used to clean the Yancheng modern excavators, excluding orifice clogging it. The inspection orifice not blocked, the pressure relief valve why still tune up? Most of this situation is due to the conical valve seat closed lax, allowing hydraulic C chamber not be established. Used Zhengzhou Modern excavators, used excavators recovered Jin Hao, Shandong and used Hyundai excavators provided by Shanghai Jin Hao Used Construction Machinery Co., Ltd .. "Komatsu excavators, Used Hitachi excavator, used Caterpillar excavators, used Kobelco mining" preferred Shanghai Jin Hao Used Construction Machinery Co., Ltd. (2), the company is located: Hongmei Road, Minhang District, Shanghai, over the years, Kim Ho Excavators to provide customers with the best quality service, Contact: Mr. seats. Welcome to the new and old customers call, letter, visit the guide, business negotiations. Kim Ho Excavators expect to be your long term partner!