What happened to the engine speed loss of Tenda small excavator? How to fix it?
As the name suggests, the engine speed loss is the fault of the engine speed decline in the excavator operation, and the performance of the speed loss is divided into two kinds, one is a slight speed loss within 200 revolutions, and the other is a serious speed loss above 300 revolutions, which is likely to cause the mountain heavy excavator to suddenly stall. The main reasons for the speed loss of small excavator engine are the following 8 points.
1. The diesel oil circuit of the small excavator is caused by the fault. In general, when the diesel oil circuit is blocked, the speed loss may be caused.
2. The hydraulic system of the excavator fails, so that the hydraulic pump can not change the displacement normally, resulting in too high system pressure, speed loss and possibly holding machine failure.
3. The output power of the excavator engine is insufficient, the output power is lower than the rated power, and the speed is too low. There is also a problem with the main pump.
4. The engine uses poor fuel quality or high fuel water content, which will lead to insufficient power of the engine, resulting in speed loss.
5. When the air intake system leaks or is blocked, it will cause insufficient air supply to the engine, resulting in insufficient fuel combustion, and there will be speed loss and black smoke.
6. Because the solenoid valve clearance is too large, the oil supply is insufficient, which causes the engine to lose speed.
7. The fuel system oil supply circuit pipe joint is loose or the pipeline is broken, causing fuel leakage or foreign body blockage, resulting in insufficient oil supply, in addition to speed loss may also cause flame failure.
8. There are many reasons for speed failure, such as wrong valve clearance, wrong fuel injection timing, turbocharger damage, brake problems and so on.
Having said so many reasons for the speed loss of the excavator engine, what should be done when the speed loss occurs?
1. First check whether the diesel used in the small hydraulic excavator is deteriorated, whether there are impurities in the oil, and check whether the oil circuit is blocked.
2. Check the valve clearance size of the excavator engine and check the speed of the engine.
3. Check the intake pipe, clean the air prefilter and air filter element, and start the engine again.
4. Check whether the speed loss problem of the small hydraulic excavator occurs under the engine load state?
5. Carefully check the engine to see if it is caused by engine failure.
6. In addition, it is necessary to control, hydraulic system, fuel system and so on.