The bearing should be cleaned after every 300 hours. If the bearing is lubricated by engine oil, it is better to fill 1 / 3 of the bearing seat space when adding new oil, and the Zui is usually no more than 1 / 2. Before operation, just screw down the normal cover oil cup cover a little. When the pulverizer bearing is seriously worn or damaged, it should be replaced in time, and pay attention to strengthen the lubrication; if using tapered roller bearing, pay attention to check the axial distance of the bearing to make it adhere to 0.2-0.4 mm. If there is any discomfort, it can be adjusted by adding or reducing the paper pad at the bearing cover.  

The screen is made of stainless steel. When the screen is worn or broken down by foreign matters, if the damaged area is not large, it can be repaired by riveting or soldering; if it is damaged in large area, a new screen should be replaced.