Flameout of excavators is a common problem in the use of excavators, but because excavators are composed of a variety of precision machines, this phenomenon often occurs, but I don't know why. This article will summarize some causes and troubleshooting methods of excavator flameout for reference only.
reason:
1. Calcined fuel forms self extinguishing
2. There is leakage in the oil circuit of the excavator, and the fuel injection pump is faulty.
3. The excavator flamed out by itself. If there was the appearance of black smoke from the exhaust pipe due to the gradual reduction of engine speed, it is likely that the oil supply of the excavator is not smooth, the engine is not smooth, and the bearing of the engine burns.
4. If the excavator suddenly shuts down during operation, the diesel may also be unclean. It is recommended to replace the diesel filter element first, and then calibrate the fuel injector.
5. If the excavator automatically shuts down after starting for a period of time, and the excavator cannot start for a short time after flameout, it is likely that the diesel pump (high-pressure oil pump) or injector is faulty.
6. The engine stalls due to large air inlet resistance and blocked oil inlet.
7. The hydraulic pump pressure is too high.
8. The excavator control system actively stalled because it received an error signal.
Solution:
Generally, if the excavator suddenly stalls and stalls during operation, you need to check the following:
1. First, check the oil supply circuit of the excavator, whether the oil supply is smooth and whether the oil circuit is blocked. It is recommended to clean the fuel filter element, replace all filter elements, disassemble and inspect the diesel pump, and check whether the fuel injection length of the injector can reach the specified length.
2. Then, check whether the excavator engine works for a long time, resulting in engine overload or engine overheating, and start the self-maintenance function of the engine.
3. Generally, the flameout of the excavator is due to the failure of the fuel circuit. Carefully check the oil circuit for air leakage and oil leakage. Then check whether the pipe joint seal is damaged, whether the filter element is stuck, and whether the water drain cover of the oil-water separator is tightened.
4. Flameout may also be a hydraulic problem. The hydraulic pump does not match the engine power. At this moment, professional repair equipment shall be used for measurement, and professional equipment shall be used for commissioning valve group force.
