Often check the rotary bearing tooth surface, and keep the surface clean and coated with grease. According to the type of slewing bearing and using the environment, selecting the best grease. Rotary bearing operation for the first time after 100 hours, check the bolt pre-tightening force, after operating 500 hours to check each time, to keep rotary bearing has enough pre-tightening force. Often focus on the operation situation of slewing bearing, if there is abnormal sound, impact, etc., to stop in time to check, find out why it out, must carry on the overhaul when necessary
