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What are the three grades of automobile beauty maintenance?
The first-class maintenance is generally carried out when the vehicle travels to 1500~2000km. It mainly includes checking and fastening the loose bolts and nuts of the exposed parts of the automobile, adding grease and lubricating oil according to the parts specified in the lubrication table, and cleaning the filter.

Secondary maintenance is generally carried out when the car is driving 6000~8000km. The main purpose is to carry out in-depth technical inspection and adjustment of vehicles to maintain good running performance. In addition to the first-level maintenance, it is also necessary to eliminate the faults and hidden dangers found. The driver should provide the maintenance workers with the bad technical conditions in vehicle operation and understand the main contents of secondary maintenance.

The three-level maintenance cycle is generally 36000~40000km, which is a maintenance measure to consolidate and maintain the normal service performance of each assembly after several secondary maintenance. It mainly includes assembly and disassembly, cleaning, inspection, adjustment and elimination of hidden dangers.