The specific reasons why the solenoid hydraulic directional valve does not work are as follows:
1. Because the machining accuracy of hydraulic valve core and solenoid valve body is not high, the radial clamping force will be produced, resulting in the valve core stuck.
2. The electromagnetic force of the solenoid valve is not enough, so the valve core cannot move, so it is necessary to replace the appropriate electromagnet.
3. The solenoid valve core is roughened in the valve body, which is stuck in the valve body and cannot operate.
4. The residual magnetism of DC electromagnet is large, which makes the valve core not reset.
5. The axis of centering spring is askew, which makes the valve core stuck in the valve.
6. Serious oil pollution, blocking the sliding clearance, leading to valve core death.
Gear pumps