Excavator hydraulic pump solenoid valve R901155051 DX140 DX380 DX420 proportional solenoid valve

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.