Long-term operation will cause a variety of abnormal phenomena in the leveler. The first is leakage. Due to the influence of loose parts, vibration and heat on the leveler, leakage will occur at the sealing surface and pipe joints of the leveler. Some casting defects are caused by the leveling machine manufacturer during assembly and debugging. It is difficult to find at times, but due to vibration and shock during operation, this kind of defect is exposed and manifests as an oil leak.

Another abnormal phenomenon of the 　　 leveler is poor lubrication. Due to the small fit clearance of newly assembled parts, and due to the assembly of the leveling machine manufacturer, the lubricant is not easy to form a uniform oil film on the friction surface to prevent wear, thereby reducing the lubrication efficiency, causing early abnormal wear of the parts, and in severe cases, it will cause precision The mating friction surface is scratched or stuck, causing failure.

　　Excessive wear rate is still one of the abnormal phenomena of leveling machines. Due to the influence of leveling machine parts processing, assembly and debugging, the contact area of ​​the mating surface is small, and the allowable twisting distance is large. When the leveler is running, the uneven parts on the surface of the parts mesh and rub each other, and the metal scraps that fall off are used as abrasives to continue to participate in the friction, accelerating the wear of the mating surface.