Proportional solenoid valve YN22V00014F1 DX140 SK200-8 SK250-8 excavator relief valve

If the solenoid valve is broken, it will directly affect the action of the switching valve and the regulating valve. The common faults are that the solenoid valve does not act, and the solenoid valve is broken.
(1) The solenoid valve connector is loose or the wire tip is off, the solenoid valve is not electric, and the wire tip can be tightened.
(2) Solenoid coil burned out, you can remove the solenoid valve wiring, measurement with a multimeter, if open, the solenoid coil burned out. The reason is that the coil is damp, causing poor insulation and magnetic leakage, causing the current in the coil to be too large and burned, so it is necessary to prevent rain from entering the solenoid valve. In addition, spring
Too strong, the reaction force is too large, the coil turns are too few, and the suction is not enough can also make the coil burn. In case of emergency, the manual button on the coil can be pressed from the "0" position in normal operation to the "1" position to make the valve open.
(3) The solenoid valve is stuck. Solenoid valve spool sleeve with a small gap (less than 0.008mm), a - generally a single assembly, when there are mechanical impurities into or too little oil, it is easy to get stuck. The treatment method can be steel wire through the small hole of the head to make it spring back. Fundamental solution
The method is to remove the solenoid valve, take out the spool and spool sleeve, and clean it with CCI4, so that the spool is flexible in the valve sleeve. When disassembling, attention should be paid to the assembly sequence and external wiring position of each component, so as to reassemble and wire correctly, and check whether the oil spray hole is blocked and whether the lubricating oil is enough.