What are the maintenance requirements for the crane’s slewing support device?

Thread Content

The slewing bearing device is one of the very important load-bearing components of a crane; it is welded to the turntable, which has a complex structure and stress conditions. Cranes used in various complex environments are prone to severe rusting and wear of their slewing support devices. Therefore, more careful attention should be paid during routine maintenance, with the following requirements being key: 1. When in use, if any abnormal changes in noise or rotational torque are detected, it is necessary to disassemble the device for inspection and take corrective action promptly. 2. The swing bearing should be lifted or placed horizontally; vertical lifting or placement is prohibited as it may cause deformation. 3. Regularly clean the debris or dust from the tooth surface, and then apply lubricant. 4. Regularly check the tightness of the bolts; inspections and tightening are required every 1,000 hours of operation. For swing supports used for the first time, the bolts should be inspected and tightened after 100 hours and 500 hours of use. 5. After the swivel bearing has been in operation for 50 hours, align the 4 oil cups on the raceway with those on the gear ring of the swivel bearing, and add lubricant.