Stage 1: Running-in period of parts (about 1000-1500 km). At this stage, the wear rate of parts will be faster, and the wear rate will gradually slow down after each part runs in well.
Stage 2: Normal working period of parts. At this stage, the wear rate of parts will gradually slow down with the increase of vehicle mileage.
Stage 3: Accelerated wear period of parts. At this stage, the clearance of parts has reached the maximum allowable limit, and the wear degree will increase sharply. As the clearance increases, the lubricating film is difficult to maintain, the impact load increases, and the wear volume increases, which will eventually lead to faults, such as abnormal noise, leakage, abnormal temperature and so on. If these parts continue to be used, abnormal wear and tear will occur and parts will be damaged quickly.
According to the wear stage of parts, practical maintenance measures can be taken to keep the car in good condition. After a certain mileage and time, the vehicle should be maintained according to the technical standards of vehicle maintenance, according to the prescribed process flow, operation scope, operation items and technical requirements, so as to prolong the service life of the vehicle, ensure the safety of the vehicle and reduce the cost of use.