If the rotary lock is not flexible or in place during the use of the overturning spreader, check the adjusting nut, and then check the following components:

1. Whether the transmission mechanism is stuck, if it is stuck, it is poor lubrication, and lubricating oil (or grease) should be added to the movable joints of the transmission mechanism. If the guide pin is too tight, loosen the nut properly. If the connection is loose and the transmission pipe or other bar is deformed, it should be corrected;

2. When in use, the paint on the indicator board of the flip spreader should be prevented from falling off. Once found, it is necessary to make up the original marked paint in time.

3. For the wire rope on the flip spreader, it should be cleaned in time and coated with lubricating oil or grease, especially at the bend of the wire rope.

4. The main stress components, lifting rings, rotary locks, ear plates and rigging shackles shall be inspected at least once every three months under normal use, and there shall be no cracks and serious deformation.

5. All oil cups, including ratchet mechanism oil cup, sliding bearing seat oil cup and rotary lock box oil cup, should be filled with lubricating oil in time according to the use situation.

6. The overturning spreader shall not exceed the rated lifting weight.

7. In the process of turning over the spreader crane, it should be lifted stably to avoid the deformation of the spreader due to collision with other equipment.