Due to oil leakage, the lubricating oil in the machine is reduced, and the parts are poorly lubricated and insufficiently cooled, which will cause early damage to the parts and even leave hidden dangers of accidents. First, the main reason of common tanker oil leakage 1. Poor quality, material or workmanship of products (accessories); There is something wrong with the structural design. 2. The assembly speed is improper, the mating surface is not clean, and the gasket is damaged, displaced or not installed according to the operating procedures. 3. Uneven tightening force of the fastening nut, broken thread or loose fall-off will lead to work failure. 4. The sealing material is worn, aged, deteriorated and deformed after long-term use. 5. Too much lubricating oil, too high oil level or wrong oil. 6. The joint surface of parts (side cover, thin-walled parts) is bent and deformed, the shell is damaged, and lubricating oil seeps out. 7. After the exhaust plug and one-way valve are blocked, due to the difference of air pressure inside and outside the box shell, oil leakage often occurs at the place where the seal is not tight. Second, measures to prevent oil leakage from oil tankers. Pay attention to the function of gasket. Gaskets between parts of automobile fixing parts (such as joint end face, end cover, shell, cover pad, flat enamel cover plate, etc.). ) plays the role of leakage prevention and sealing. If the materials, production quality and installation do not meet the technical specifications, it will not play a role in sealing and leakage prevention, and even accidents will occur. Such as oil pan or valve cover, because of the large contact area, it is difficult to compress, resulting in oil leakage. 2. All kinds of fastening nuts on the vehicle should be tightened according to the specified torque. If the gasket is too loose, it will leak water; Too tight will make the metal protrusion or thread around the screw hole slip, resulting in oil leakage. In addition, if the oil drain plug of the oil pan is not tightened or loosened, it is easy to cause oil loss, and then the engine damage accident of "burning tile and holding shaft" occurs. 3. Replace the failed oil seal in time. Many moving parts (such as oil seal and O-ring) on the vehicle will throw oil because of improper installation, misalignment and deviation of the journal and the oil seal cutting edge. Some oil seals will lose their elasticity due to rubber aging if they are used for too long. Found leakage should be updated in time. 4. Avoid blocking the check valve and exhaust valve. As a result, the temperature in the tank shell rises, and the oil and gas fill the whole space and cannot be discharged, so that the pressure in the tank shell rises, the consumption of lubricating oil increases, and the replacement cycle is shortened. After the engine ventilation system is blocked, the movement resistance of the piston increases and the fuel consumption increases. Due to the pressure difference between the inside and outside of the box shell, oil leakage often occurs at the weak seal. Therefore, it is necessary to inspect, dredge and clean the vehicle regularly. 5. Properly solve the sealing of various tubing joints. Vehicle union nut is often disassembled, which is easy to slip and break, which will cause oil leakage. Replace the union nut, solve its conical surface seal by grinding, and press the nut to solve the seal. 6. Avoid oil spilling from the hub. Too much grease in the hub bearing and cavity, or improper assembly of its oil seal, poor quality and aging failure; Frequent braking leads to excessive hub temperature; Loose shaft nut will cause the hub to throw oil. Therefore, the "cavity lubrication method (that is, moderate lubrication)" must be used to dredge the exhaust hole.