What are the causes and treatment methods of hydraulic cylinder action failure? The causes and treatment methods of hydraulic cylinder action failure are as follows:

1. Stuck valve element or blocked valve hole:

When the flow valve or directional valve core is stuck or the valve hole is blocked, the hydraulic cylinder is prone to malfunction or action failure. At this time, check the oil contamination; Check whether the dirt or colloidal sediment is stuck to the valve core or blocked the valve hole; Check the valve body for wear.

2. Stuck piston rod and cylinder barrel or blocked hydraulic cylinder:

At this time, the hydraulic cylinder does not act or acts very little regardless of the operation. At this time, check whether the seals of the piston and piston rod are too tight, whether dirt and colloidal deposits enter, whether the axial line of the piston rod and cylinder barrel is aligned, and whether the vulnerable parts and seals are invalid.

3. Control pressure of hydraulic system is too low:

The throttle resistance in the control pipeline may be too large, the flow valve is not adjusted properly, the control pressure is not appropriate, and the pressure source is disturbed. At this time, check the control pressure source to ensure that the pressure is adjusted to the specified value of the system.

4. Air entering the hydraulic system:

This is mainly because there is leakage in the system. At this time, check the liquid level of the hydraulic oil tank, the seals and pipe joints on the oil suction side of the hydraulic pump, and whether the oil suction strainer is too dirty. If so, the hydraulic oil shall be supplemented, the seals and pipe joints shall be treated, and the coarse filter element shall be cleaned or replaced.