1. Check whether the bearing lubrication is good.
2. Check whether all fasteners are fastened.
3. Check whether the drive belt is installed correctly and in good condition. If the belt is found to be damaged, it should be replaced in time. When there is oil on the belt or pulley, it should be wiped clean with a clean cloth in time.
4. Check whether the protective device is intact. If the protective device is found to be unsafe, it should be eliminated in time.
5. Check whether there are materials or other sundries in the damaged cavity, and if so, remove them.
6. Check whether the head of the hydraulic jack or the screw jack is returned, and whether the adjusting gasket is properly installed and compressed.