Excavator solenoid valve TM58401 hydraulic pump proportional solenoid valve 3768317

The working principle of excavator solenoid valve
 

  The excavator mainly uses direct-acting solenoid valve, which has the advantages of convenient control, fast action, easy to achieve remote control, and can work normally under vacuum, negative pressure and zero pressure. The excavator solenoid valve has a closed chamber inside, the valve body is in the middle of the chamber, and the two ends of the valve body are configured with electromagnets according to the needs, or only one end is configured with electromagnets. Using the magnetic force generated by the principle of inductance, the control spool moves to achieve the oil circuit reversal, when the electromagnet coil is energized, the electromagnet will pull in the opposite direction, and push the spool to move in the direction of suction, thereby blocking or exposing different oil holes, and the oil will enter different pipelines according to the instructions. If the solenoid coil of the solenoid valve is burned out or cut off, it cannot generate magnetic force, and the valve core cannot be moved, and the excavator cannot perform related operations.

The reason for the frequent failure of excavator

1. Blockage of working parts causes the excavator to self-stall.
The performance is that the engine speed gradually decreases before extinguishing, and the exhaust pipe emits black smoke. In this case, the working parts of the excavator should be checked for blockage first. If there is a blockage, the engine can generally be restarted after the blockage is cleared. In addition, the engine due to poor lubrication, showing the shaft burning accident, will also produce this phenomenon, in this case, the engine needs to be overhauled. The reason of excavator self-extinguishing.

 2, the engine fuel supply is not smooth, resulting in the excavator self-extinguishing.
The performance is that the engine speed is unstable or slow falling before the machine is turned off, but there is no obvious black smoke from the exhaust pipe. In this case, we should check whether the fuel in the tank is exhausted, whether the oil supply of the oil pump is normal, whether the sediment cup oil inlet is blocked by debris, and whether the diesel filter is too dirty. If the diesel filter is too dirty, the diesel filter should be removed, cleaned and re-installed, and the air in the oil circuit should be eliminated. The reason of excavator self-extinguishing.

3. The engine oil supply is suddenly interrupted or the load is suddenly increased, causing the excavator to stall by itself.
Before extinguishing the excavator, there was no process of speed decline, showing sudden extinguishing. In this case, we should first check whether the engine parts are suddenly loose or fall off, for the engine that is controlled by the high pressure oil pump oil supply rod by the flameout solenoid valve, we should also check whether the flameout solenoid valve is powered off, and the cause of the excavator's self-flameout.

4. Blockage of working parts causes the excavator to self-stall.
The performance is that the engine speed gradually decreases before extinguishing, and the exhaust pipe emits black smoke. In this case, the working parts of the excavator should be checked for blockage first. If there is a blockage, the engine can generally be restarted after the blockage is cleared. In addition, the engine due to poor lubrication, showing the shaft burning accident, will also produce this phenomenon, in this case, the engine needs to be overhauled. The reason of excavator self-extinguishing.

5. the engine fuel supply is not smooth, resulting in the excavator self-extinguishing.
The performance is that the engine speed is unstable or slow falling before the machine is turned off, but there is no obvious black smoke from the exhaust pipe. In this case, we should check whether the fuel in the tank is exhausted, whether the oil supply of the oil pump is normal, whether the sediment cup oil inlet is blocked by debris, and whether the diesel filter is too dirty. If the diesel filter is too dirty, the diesel filter should be removed, cleaned and re-installed, and the air in the oil circuit should be eliminated. The reason of excavator self-extinguishing.