1. Bearing temperature too high
2. Bearing noise
(1) When replacing the bearing, carefully check the new bearing, and carefully check the shaft diameter, bearing seat hole and rotor;
(2) When assembling and disassembling the bearing, strictly implement the maintenance process and operate carefully to avoid bearing damage caused by improper assembly and disassembly;
(3) Refuel and change the oil on time to ensure that the working condition of the bearing is always in good condition;
(4) Check carefully during operation, and eliminate the hidden trouble in time if it is found.