What are the causes and treatment methods of hydraulic cylinder malfunction

What are the causes and treatment methods of Hydraulic Cylinder malfunction? Company technology points out that there are several reasons and treatment methods for hydraulic cylinder failure:

1. Spool stuck or valve bore blocked:

When the flow valve or Direction Valve spool is stuck or the valve bore is blocked, the hydraulic cylinder is liable to malfunction or malfunction. At this time, check the contamination of oil; Check whether dirt or gum deposits have stuck the spool or blocked the valve bore; Check valve body for wear.

2. Piston rod and cylinder barrel jammed or hydraulic cylinder blocked:

At this point, the hydraulic cylinder does not act or does not act at all, regardless of how it is operated. At this point, check whether the piston and piston rod seals are too tight, whether they enter dirt and gum deposits: whether the axis line of the piston rod and cylinder barrel is centered, whether the fragile parts and seals are ineffective.

3. Hydraulic System control pressure is too low:

The throttle resistance in the control pipeline may be too high, the flow valve is not adjusted properly, the control pressure is not appropriate, and the pressure source is disturbed. The control pressure source should be checked to ensure that the pressure is adjusted to the specified value of the system.

4. Air entering hydraulic system:

This is mainly due to leaks in the system. At this time, check the fluid level of the hydraulic tank, the seals and pipe connections on the suction side of the hydraulic pump, and whether the suction strainer is too dirty. If so, supplement the hydraulic fluid, handle seals and fittings, clean or replace the coarse filter element.