Common faults of hydraulic cylinders and their troubleshooting methods?

During the use of hydraulic cylinders, various faults may occur, affecting their normal operation. The following are some common malfunctions, their causes and solutions.
Abnormal action type faults:
No action at all: It might be due to a clogged oil passage or installation deviation. Check and unclog the oil passage and calibrate the installation position.
Slow movement: It might be due to insufficient oil supply from the hydraulic pump or oil mixed with air. Check the condition of the pump body and exhaust it.
Crawling vibration: It is usually caused by gas residue, improper fit clearance or problems with the material of the sealing parts. Exhaust, adjust the clearance or replace the seals.
End impact: It might be due to the failure of the buffer device. Repair or replace the buffer component.
Leakage-type faults
External leakage: Usually caused by the aging or wear of seals. Replace the seal.
Internal leakage: It may be due to damage to the piston seal or scratches on the inner wall of the cylinder barrel. Repair the inner wall of the cylinder barrel or replace the piston assembly.
Pressure and load type faults:
Insufficient output force: It might be due to low system pressure or internal leakage. Calibrate the pressure and repair the leakage.
Jamming phenomenon: Usually caused by contamination of hydraulic oil or bending deformation of the piston rod. Clean the oil cylinder and straighten the piston rod.
Special working condition failure
Abnormal conditions in high-temperature environments: It might be due to aging of the seals or a decrease in the viscosity of the oil. Add cooling devices or replace high-temperature resistant seals.
Heavy-load impact condition: It might be that the weld at the bottom of the cylinder barrel is cracked. Eliminate welding stress or switch to a threaded connection structure.
For more detailed information, it is recommended to refer to the relevant hydraulic system maintenance manual.