The engineering machinery lubricating oil is mainly used to remove or reduce the lubricating oil fraction and the residue fraction from the crude oil distillation unit by solvent deasphalting, solvent dewaxing, solvent refining, hydrorefining or acid-base refining, and white earth refining. A component of free carbon, a material with low viscosity index, a substance with poor oxidation stability, a paraffin wax, and a chemical substance that affects the color of the finished oil, to obtain a qualified lubricating base oil (hydrogenated base oil and common lubricating base oil) The difference is that after adding and adding additives, it becomes a construction machinery lubricating oil product.

Features are as follows:

      1. Engine lubricating oil: The engines of large engineering machinery are basically heavy-duty direct-injection diesel engines. The power equipment has the characteristics of complicated working conditions, high power, heavy heat load and high sulfur content of fuel. Therefore, it requires minimum engineering engine oil. Meet the standards of API CF-4 and above. After 2010, the EFI engine that meets the national three emission reduction standards requires that the engineering machinery engine oil meet the minimum standards of API CH-4 and above.

      2. Anti-wear hydraulic oil for engineering machinery: The hydraulic transmission system of engineering machinery consists of components such as hydraulic pump, control valve, actuator and auxiliary equipment. It has the characteristics of high pressure, high power and heavy load of oil pump. It requires excellent resistance to oil. Grinding performance, better anti-foaming and thermal oxidation stability, while requiring oil with higher cleanliness and good filterability. Hydraulic oil for construction machinery usually uses HM/HV46 or higher hydraulic oil.

      3. Engineering machinery gear oil: mainly used for front and rear drive axle final reducer and wheel reducer system. According to the quality level of API vehicle gear oil, large engineering machinery commonly uses API GL-5 heavy load vehicle gear oil, but special for construction machinery. Some conventional physical and chemical indicators of gear oil exceed the API GL-5 quality requirements to meet the high-speed and shock load of engineering machinery deceleration systems, and the hyperbolic gear lubrication under high-speed low-torque and low-speed high-torque conditions.

      4. Hydraulic transmission oil for engineering machinery: The hydraulic transmission oil for engineering machinery must meet the gear transmission, hydraulic transmission, automatic transmission and power of various types of loading machinery and other construction machinery under low speed and high torque conditions. The steering device is a multi-purpose vehicle oily medium with various functions such as energy transmission, control, lubrication and cooling. China's hydraulic transmission oil has only two kinds of enterprise specifications, which are divided into 8th and 6th according to the 100°C kinematic viscosity.