1. Installation of slewing bearing 　　Before installing the slewing bearing, check the mounting surface of the main engine. The support should have sufficient strength, the connecting surface should be machined, and the surface should be flat and free of debris and burrs. For those that cannot be machined to achieve the required flatness, special plastics with high injection strength can be used as fillers to ensure the accuracy of the installation plane and to reduce vibration. The ring of the slewing bearing has a quenched soft zone, which is marked with 'S' on the end face of the ring. The position of the soft zone should be placed in the non-load area or the non-recurrent load zone (the plug hole is always located in the soft zone). Belt).　　 When installing the slewing bearing, radial positioning should be carried out first, the installation bolts should be tightened crosswise, and the rotation of the bearing should be checked. There should be sufficient pre-tightening force when tightening the bolts, and the pre-tightening force should be 70% of the yield limit of the bolt material. Mounting bolts should be equipped with quenched and tempered flat washers and spring washers are strictly prohibited.　　2. Maintenance of slewing bearing” After the slewing bearing is installed and put into operation after 100 hours of continuous operation, check whether the pre-tightening torque of the mounting bolt meets the requirements, and repeat the above inspection every 500 hours of continuous operation.　　 The slewing bearing should be filled with an appropriate amount of grease after installation, and the bearing should be slewing while filling to make the grease evenly distributed. The slewing bearing will inevitably lose part of the grease after working for a period of time. Therefore, the slewing bearing in normal operation should be refilled every 50 to 100 hours.　　3Transportation and storage of slewing bearings. During transportation, the bearings should be placed horizontally on the vehicle, and measures should be taken to prevent sliding and vibration, and auxiliary support should be added when necessary.　　The bearing should be placed horizontally on a dry, ventilated and flat place, and should be kept away from chemicals and other corrosive items during storage. If multiple sets of bearings need to be stacked, three or more wooden spacers of equal height should be evenly placed along the circumference between each set, and the upper and lower spacers should be placed in the same position. Bearings that need to be stored after the anti-rust period should be cleaned and anti-rust treated again.