LIUGONG excavator work weak and engine smoke failure, may be caused by a variety of complex factors, the following will be more detailed analysis of these reasons:

Firstly, radiator oil leakage is a common problem. As an important part of the engine cooling system, the radiator will cause the engine to overheat once it leaks oil, which will affect its normal work, and may even cause the phenomenon of weak work and black smoke.

Secondly, the problem of excavator oil circuit can not be ignored. Oil leakage or blockage will directly affect the fuel supply, resulting in inadequate engine combustion, resulting in black smoke.

Moreover, the internal wear of the engine is also an important cause of such failures. For example, the wear of the cylinder liner or the piston and piston ring of the engine cylinder will reduce the sealing performance of the engine, so that the fuel cannot be fully burned, resulting in black smoke and affecting the power output of the excavator.

In addition, the pressure setting of the injector is not correct or the atomization effect is not good, which will also lead to inadequate fuel combustion and cause black smoke problems. The normal operation of the injector is crucial for the combustion efficiency of the engine, so its pressure must be checked and adjusted regularly, while ensuring that its atomization effect is good.

Finally, the failure of the PT pump (fuel pump) of the excavator and the wear of the camshaft may also cause the excavator to work weakly and the engine to emit black smoke. The failure of these components will directly affect the fuel supply and combustion process, thus causing a series of problems.

To sum up, in view of the failure of LIUGONG excavator to work powerless and engine smoke, it is necessary to investigate and repair from many aspects.