1. Inspection work before use is required. Mainly to see whether the parts are normal, whether there is damage, etc. Use after checking everything.
2. When working on the self-adjusting roller frame, inspection, disassembly, cleaning, etc. cannot be carried out. Because it is dangerous and can easily damage the wheel frame.
3. The bearings of the adjusting roller frame should be lubricated and checked for damage. If there is, it should be replaced in time.
4. Pay attention to the connection of the wire at any time. Always check whether it is firm and whether the contact points are oxidized or overheated.