1, the piston cylinder is pulled, resulting in the piston rod extension end with the piston rod seal damage.
2, the long-term use of seal aging caused by the piston rod extension end and cylinder liner seal damage, many domestic production of hydraulic cylinder manufacturers unreasonable design caused.
3. The oil cylinder inlet and outlet pipe joint is cracked.
4. There are defects on the cylinder body or the cylinder end cover.
5, the piston rod is pulled grooves, pit points, etc.
6, the deterioration of the lubricating oil makes the cylinder temperature rise abnormally, and promotes the aging of the seal ring.
7. Often exceed the pressure range of the cylinder.

8, the long-term use of the main oil seal causes deformation aging wear and tear.