1、维修、更换屏幕。筛网由钢板或铁片穿孔制成。当筛网被异物磨损或折断时，如果损坏不大，可以采用铆接或焊接的方法进行修复；如果该区域损坏，则应更换新屏幕。安装筛网时，筛网有毛刺的一面应朝内，光面朝外，筛网与筛框应紧密贴合。环筛安装时，搭接处的搭接处应顺旋转方向，以防止搭接处卡住物料。
Second, the lubrication and replacement of the bearings. The corn grinder is cleaned after every 300 hours of operation. If the bearing is oil lubricated, it is advisable to fill the bearing housing clearance by 1/3 when adding new oil, and the maximum is not more than 1/2. Just tighten the capped oil cup cover a little before operation. When the corn grinder bearing is seriously worn or damaged, it should be replaced in time, and pay attention to strengthen lubrication; if using tapered roller bearing, pay attention to check the axial spacing of the bearing to keep it 0.2-0.4 mm. If there is discomfort, increase it. Reduce the paper pad at the bearing cover to adjust.
Third, the replacement of the claws and hammers. Among the pulverizing parts, the pulverizing claws and the hammer pieces are the wearing parts in the corn grinder, and are also the main components affecting the pulverizing quality and productivity. The pulverizing claws and the hammer pieces should be replaced in time after being worn. When the jaw crusher replaces the claws, the disc should be pulled out first. Before pulling out, first open the round nut lock piece on the back of the disc, use a hook wrench to unscrew the round nut, and then pull the disc out with a special puller. In order to ensure the balance of the rotor operation, it is necessary to pay attention to the complete set of replacement when changing the teeth. After the replacement, static balance test should be done to make the corn grinder work stable. Be sure to tighten the nut when assembling the jaws, and be careful not to miss the spring washer. The qualified parts should be selected when changing the teeth. The weight difference of the single teeth should be no more than 1.0-1.5 grams.