Hydraulic oil viscosity hydraulic oil viscosity determines the principle that, in consideration of the hydraulic circuit operating temperature and efficiency of the premise, so that (for pumps and motors and other components) hydraulic oil viscosity is in the optimum range (16-36x10-6mm2 / s); and ambient temperature corresponding to the lowest viscosity of the cold start short ≤1000X10-6mm2 / s; and highest viscosity oil leakage 90 ℃, corresponding to a short time allowed ≥10X10-6mm2 / s. Used excavator plant. Visual inspection: Before starter car should be visually inspected. Used excavator plant market. In the following order a thorough examination of the surrounding environment and the bottom of the locomotive: 1, whether there are oil, fuel and coolant leaks. 2. Are there loose bolts and nuts. Used excavator factory prices. 3. Are there electrical lines broken wires, short circuit and battery connectors are loose. 4, if there is oil. 5, whether people buildup. Used excavator factory price _ Kim Ho used excavators (certified) _ Used excavator factory 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.