There is hydraulic oil in the shock absorber. At the same time there is a certain amount of lubricating oil composition.
Hydraulic oil is the hydraulic medium used in the hydraulic system that utilizes hydraulic pressure energy. It plays a role in energy transfer, anti-wear, system lubrication, anti-corrosion, anti-rust, and cooling in the hydraulic system.
For hydraulic oil, first of all, it should meet the requirements of hydraulic device for liquid viscosity at working temperature and starting temperature. Since the viscosity change of lubricating oil is directly related to hydraulic action, transmission efficiency and transmission accuracy, it is also required that the viscosity-temperature performance and shear stability of the oil should meet the various needs of different applications.