Reasons and troubleshooting for creeping of hydraulic cylinder during operation:

1. Air enters the cylinder. An exhaust device shall be added, or the hydraulic cylinder shall move rapidly with Z large stroke to force air out.

2. The sealing ring at the end cover of the hydraulic cylinder is pressed too tight or too loose. The sealing ring shall be adjusted to have proper tightness to ensure that the piston rod can be pulled back and forth smoothly by hand without leakage.

3. The piston and piston rod have poor concentricity, which should be corrected and adjusted.

4. If the hydraulic cylinder is not parallel to the guide rail after installation, it should be adjusted or reinstalled.

5. The piston cylinder is bent. The piston cylinder shall be aligned.

6. The piston cylinder has poor rigidity, so the piston rod diameter should be increased.

7. The clearance between moving parts of hydraulic cylinder is too large. The fit clearance should be reduced.

8. The installation position of the hydraulic cylinder is offset. The parallelism between the hydraulic cylinder and the guide rail shall be checked and corrected.

9. Linear difference of inner diameter of hydraulic cylinder (drum, cone, etc.). The piston shall be repaired and reassembled.

10. Corrosion and galling in cylinder. Rust and burrs shall be removed, and if strict, they shall be bored.