What’s Wrong With The Black Smoke From The Excavator?

What is the matter with the sudden failure of the small excavator and the black smoke, what should we do? Aside from the situation where the machine is under heavy load, there will be slight black smoke coming out. The root cause of other black smoke failures is incomplete combustion. There are many reasons for the black smoke failure of the small excavator. The following points are possible:

I.Poor quality of diesel

If you want a good machine, you must use light diesel oil of qualified quality.

The cleanliness of the fuel is very important. Poor quality fuel will cause the excavator to work weakly, the exhaust gas of the engine will turn black, and the sulfur and water in the diesel will exceed the standard, which will cause the oil nozzle, oil pump and engine to be strained, and in severe cases, it will cause the engine to pound the cylinder. phenomenon, resulting in unnecessary losses.

II.The small excavator fuel injector failure

Too much fuel is injected, resulting in insufficient combustion. It is necessary to ask the service personnel to carry out the engine cylinder break test to check whether it is caused by the wear of the fuel injector.

III.The small excavator has insufficient air intake, and if the air intake is not smooth, black smoke will be emitted

The turbocharger impeller bearing and impeller wear, resulting in insufficient intake air and oil in the fuel, which also produces black smoke during the combustion process.

If the air intake is not smooth, black smoke will be emitted, which needs to be checked. In addition, the tightness between the piston ring and the cylinder (compressed air) and the valve must be guaranteed.

IV.The air filter element is not replaced in time

Many owners do not pay much attention to the air filter when replacing maintenance parts, and the replacement is either delayed or simply forgotten, which is also one of the important reasons for black smoke.

The editor has also compiled a troubleshooting work guide for everyone here. If you encounter similar problems, you can check them one by one.

About the cause of the smoke and weakness of the small excavator, the troubleshooting operation guide:

I.Failure phenomenon

The excavator works normally when it is unloaded, but it emits black smoke when it is digging, and the work is weak.

II.The exclusion method

1.Check the fuel supply system, if it is normal, it means there is no problem with the engine fuel system.

2.Check whether there is carbon deposition at the exhaust pipe of the engine. If a large amount of carbon deposition is found at the muffler, open both ends of the muffler and remove the carbon deposition to eliminate the speed drop caused by the power drop caused by the excessive exhaust resistance. Black smoke phenomenon.

3.Check whether the air filter indicator on the display shows a red light. If the filter element needs to be cleaned or replaced, for example, after replacing the new filter element, the engine still emits black smoke. If the air filter indicator is still red, you should check whether the coarse air filter screen is blocked by debris.

The use of small excavators requires frequent maintenance to reduce losses caused by mechanical failures.