1. The engine speed drops.
First test the output power of the engine itself. If the engine output power is lower than the rated power, the cause of the fault may be poor fuel quality, low fuel pressure, no gas gap, the engine's cylinder does not work, fuel injection timing is wrong, fuel The amount of measurement value is not pair, the intake system leaks, brakes and their joysticks have problems and turbocharger. If the pump control system has failed, the engine, the pump and valve cannot be implemented in different working conditions area load optimization matching state, and the excavator will not work properly. Such faults must first start from the electrical system, and then check the hydraulic system. Finally check the mechanical transmission system.
2, the working speed is slow.
The main reason for the working speed of excavators is that all parts of the whole machine cause the engine power to decrease and the hydraulic system. The hydraulic pump of the excavator is a plunger variable pump. After a certain period of time, the internal hydraulic components (cylinder, plunger, distribution plate, nine-hole plate, turtle, etc.) are inevitable, resulting in an inner leakage. All participating data is not coordinated, resulting in low flow insufficient oil temperature and slow working speed.
At this time, you need to repair the whole machine, and repair the parts of the wear over-limit.
3, excavator weakness.
Mining weakness is one of the typical failures of excavators. For the excavation of weakness, it can be divided into two situations: one is unable to excavate, the engine does not help the car, the sensation load is very light; the second is to dig weakness, when the boom or struggle is extended, the engine is seriously honest, even flameout .
