- Insufficient lubricating oil leads to unstable running. It is necessary to add lubricating oil of the same specification or replace all lubricating oil.
- There is a problem with the slewing bearing sealing system. It is necessary to clean up all the debris and repair the sealing system.
- Gear deformation or teeth broken of the slewing bearing causes jamming or unstable running. This requires repairing the gears and re-welding the gears.
- Overloading operations leads to inflexible running of slewing bearing, which requires reducing the work load.