Disassemble them and check the bearing RACES for pits or scoring which mean the hub should not be used.
他们拆开检查坑或得分，这意味着该中心不应该使用的轴承套圈。
2
Check the joining surfaces of the generator bearing after finishing the unit alignment.
机组再对中完工后，检查发电机轴承接合面良好。
3
After about 500 hours' operation, please check the main bearing. If it is necessary, please clean and add proper amount of grease or replace it with a new one.