As a key component in the hydraulic system, the normal operation of the hydraulic cylinder is crucial to the efficiency and safety of the entire hydraulic system. In order to ensure the stable operation of the hydraulic cylinder, regular maintenance and timely elimination of common problems are essential. The following are common maintenance problems of hydraulic cylinders and their solutions:

1. Leakage problem
Cause:
The seal ring is worn or aged.
The internal and external interfaces of the cylinder are not tightened.
The surface of the cylinder rod or cylinder body of the hydraulic cylinder is scratched or damaged.
Solution:
Check the seals regularly and replace aged or damaged seals.
Ensure that the threads of all joints, connectors and valves are tightened to avoid loosening.
Check the surface of the cylinder rod and cylinder body regularly and repair or replace them if necessary.

2. Damage to the surface of the cylinder rod
Cause:
External foreign matter or dirt enters the cylinder.
Too many impurities in the hydraulic oil.
The cylinder rod is not properly lubricated.
Solution:
Use a filter to clean the hydraulic oil to prevent impurities in the oil from entering the cylinder.
Check the surface of the cylinder rod regularly. If scratches or rust are found, polish it.
Install dust-proof devices (such as dust-proof rings) to prevent external pollutants from entering.

3. The hydraulic oil temperature is too high
Reason:
Excessive friction in the hydraulic system generates heat.
Failure of components such as the oil pump and valve.
The oil viscosity is too high or the oil is not suitable.
Solution:
Regularly check the working condition of the oil pump and valve to ensure their normal operation.
Replace the hydraulic oil that meets the requirements and maintain the appropriate oil viscosity.
Install a cooling device to keep the hydraulic oil temperature within the appropriate range.

4. The hydraulic cylinder is not sensitive or stuck
Reason:
The oil is contaminated, causing the valve to be stuck.
There are foreign objects or dirt inside the cylinder.
Insufficient oil pressure or leakage in the hydraulic system.
Solution:
Clean the hydraulic system to ensure that the oil is pure.
Check and replace the contaminated oil in the hydraulic system.
Check the output pressure of the hydraulic pump to ensure that the oil pressure is normal, and check whether there is leakage in the system.

5. The noise in the cylinder increases
Reason:
The oil is contaminated or air enters the cylinder.
The oil pump is unstable or faulty.
The cylinder seal is damaged.
Solution:
Check the cleanliness of the hydraulic oil and replace the oil if necessary.
Check the oil pump and related pipelines to ensure that the oil is not contaminated and no air has entered.
Replace worn or aged seals to ensure good sealing.

6. The movement speed of the hydraulic cylinder is unstable
Reason:
The oil viscosity is not appropriate, resulting in unstable flow.
Failure of the regulating valve, control valve or pressure valve.
The hydraulic cylinder is worn or has air blockage inside.
Solution:
Ensure that the oil viscosity is appropriate and meets the working requirements of the hydraulic system.
Engineering cylinder manufacturers check and clean the regulating valve and pressure valve to ensure that the valve works properly.
Deal with the wear problem inside the cylinder and repair or replace the worn parts.

7. Air blockage problem in the hydraulic system
Reason:
There is air or bubbles in the hydraulic system.
The cylinder is not tightly sealed and air is sucked in.
Solution:
Vent the air and ensure that the system is completely free of air.
Check the cylinder and pipeline to avoid any suction points.
Engineering cylinder manufacturers regularly check the integrity of seals to prevent air from entering the system.

8. Cylinder eccentric loading or deformation
Reason:
Improper installation of the cylinder leads to uneven load.
The cylinder is subjected to external impact or improper use during operation.
The cylinder is subjected to excessive lateral force.
Solution:
Ensure that the cylinder is installed in the correct position, ensure vertical or horizontal installation, and is not subject to external interference.
Avoid overloading the cylinder and adjust the working pressure reasonably.
Marine cylinder manufacturers use appropriate cylinder designs to withstand the required lateral load.

9. Poor hydraulic oil quality
Reason:
Use hydraulic oil that does not meet the requirements.
The oil is not replaced according to the prescribed cycle, resulting in a decrease in oil performance.
Solution:
Use hydraulic oil that meets the equipment requirements and replace the oil regularly.
Monitor the working environment of the oil and check the oil quality and viscosity regularly.

The maintenance of hydraulic cylinders requires regular inspection of its various working parameters, and timely repair or replacement of damaged parts according to the usage. To ensure efficient operation of the equipment, regular cleaning, seal inspection, oil change and maintenance of cylinder components are essential.