The difference between secondary maintenance and the purpose of maintenance are different. The primary maintenance is mainly to strengthen the maintenance of automobile fasteners and replace lubricating oil. The purpose is to keep the vehicle in good technical condition and ensure the normal operation of the vehicle.
It mainly includes: checking and fastening the bolts and nuts of the exposed parts of the automobile; Add lubricant according to the specified lubrication position; Check the lubricating oil level of each component and add lubricating oil to clean each air filter.
The purpose of secondary maintenance is to keep all parts, machinery and assemblies of the vehicle in good condition. In addition to the first-class maintenance, the maintenance contents also include checking and adjusting the state of the engine and electrical equipment, removing and cleaning the oil pan and oil filter, checking and adjusting the steering and braking mechanism, and removing and cleaning the front and rear wheel bearings. Add lubricating oil, disassemble and inspect tires, change positions, etc. Million car purchase subsidy