Independent machining method of maintaining main bearing cover matched with machine body

The invention relates to the technical field of diesel engine collective equipment, in particular to an independent machining method of a maintaining main bearing cover matched with a machine body. The main bearing cover independent machining method comprises the following steps that step one, the machine body and the main bearing cover are predetected; step two, the main bearing cover is manufactured; and step three, the cover matched with the machine body is assembled, and maintenance is conducted. The method solves the problem of co-processing between cover replacing maintenance of a main bearing hole of the machine body and the assembled machine body. A novel method of replacing and repairing the new main bearing cover of the machine body is developed. Flexibility of machine body maintenance is improved, the maintenance, machining and logistic costs are reduced, and the application range is wide. The new main bearing cover is machined independently, the requirements of main bearinghole accuracy and shape