1. The carburetor and air filter should be inspected for the inspection and diagnosis of the rich combustible mixture.
2. The mixture of mixed oil and engine oil is not compared, or the brand of engine oil used is incorrect. If the oil mixture contains too much oil or the oil quality is poor, the oil of the combustible mixture cannot be completely burned, resulting in black smoke. The above phenomenon can also occur in two-stroke engines with separated lubrication, when the oil pump is out of balance and the oil supply is too much. At this time, check and adjust the oil pump as required.
3. Excessive wear or fracture of the engine, as well as excessive oil in the crankcase, will cause the oil to cascade into the combustion chamber and cause excessive oil in the mixture. If the engine crankshaft oil seal is broken, it will also cause the oil in the transmission to cascade into the crankcase and enter the combustion chamber with the mixture.
4. One of the reasons for mixing water in the fuel is that the fuel in the fuel tank itself contains water. At this time, the fuel tank should be cleaned and replaced. Another reason is that the cylinder gasket of the water-cooled engine is broken, and cold water enters the cylinder. If the water in the water tank is consumed too fast without leakage, and the exhaust smoke of the exhaust pipe is slightly white, then the cylinder gasket should be replaced for this reason.
5. Black smoke is mainly caused by incomplete combustion of fuel in the combustion chamber. Under the condition of high temperature and lack of oxygen, diesel fuel can not be fully burned, so it can be decomposed and gathered to form soot. The direct consequence of this phenomenon is that the fuel consumption of diesel engine is very high, the power is reduced, and at the same time, a large amount of carbon deposits exist in the piston plug and piston ring valve. In serious cases, the piston ring will get stuck, and the valve will not be tightly sealed to cause air leakage. At the same time, it will also accelerate the wear of parts, thus reducing the service life of the engine. Therefore, special attention should be paid to this aspect.
Black smoke from the excavator is a serious problem. You should pay attention to every action of the excavator in your daily work. The harm of black smoke can be said to be great. The role of each component is not single. It can be said that the whole body will be affected by one engine. In case of failure, problems such as oil consumption, blue smoke and black smoke, and power reduction will follow. Everyone should use carefully and maintain carefully every day, so that the excavator can operate smoothly and unimpeded!
