The motor shell is mainly used to protect the motor, so the quality of the motor shell is very important, we must take good care of it when we use it. First of all, the use environment should always be kept dry, and the motor surface should be kept clean without dust, fiber and other obstacles. Ensure good lubrication of the motor during operation. Generally, when the motor runs for about 5000 hours, the lubricating grease should be supplemented or replaced. If the bearing is overheated or found in the process of operation, the hydraulic pressure should be adjusted in time. When replacing the grease, the old lubricating oil should be removed, and the gasoline in the oil tank should be cleaned to clean the bearing and bearing cover, and then the inner and outer ring cavities of the bearing should be filled. When the data is lost, the factory should be required to change the original design of the motor winding at will. Usually, one or more of the performance will deteriorate or even can not be used.