1. Roughly remove the old rubber plate and observe the glue retention. If the area is too large, a glue scraper needs to be used to shovel the glue. The angle between the flat chisel and the surface of the drum should be kept between 15-30 degrees, otherwise it is very easy to damage the steel body.

After 2 shovels of adhesive, it is necessary to use an angle grinder to polish the surface of the drum, remove residual debris, make the surface rougher, increase the bonding area, and improve the bonding performance.