① The material chips extruded from the scratched groove will embed into the seal, which may cause new scratches in the scratched area while damaging the working part of the seal during operation.
② The surface roughness of the inner wall of the cylinder is deteriorated, the friction force is increased, and crawling is easy to occur.
③ Increase the internal leakage of the hydraulic cylinder and reduce the working efficiency of the hydraulic cylinder.
