The common fault of excavator emitting white smoke, blue smoke and black smoke.

White smoke

1, the white smoke is mostly caused by the cylinder water, please check the diesel inside there is no water, generally after starting the white smoke time is very short, the engine is no problem;

2. If the excavator starts white smoke, the oil is not reduced, and the excavator is weak, indicating that the engine cylinder mattress is damaged;

3, the injector atomization is poor, the cylinder pressure is too low is also one of the reasons for the engine white smoke, check the injector.

blueing

Blue smoke when the cold car starts: blue smoke when the cold car starts, and it is normal to disappear after the hot car, because a small part of the oil will invade the engine combustion chamber after the shutdown.

Continuous blue smoke after start-up:
1, the diesel filter is blocked, check whether the oil model is correct;
2, the engine piston ring and valve oil seal wear, resulting in oil in the inlet or exhaust pipe, resulting in the excavator blue smoke failure;
3, the coordination gap between the piston and the cylinder liner is too large to cause blue smoke;
4, oil mixed with diesel, blue smoke is a major feature of burning oil.

Black smoke

Black smoke is the external manifestation of insufficient combustion of fuel in the cylinder. We should start from three aspects:

1, insufficient intake: check whether the intake valve clearance is within a reasonable range, the valve clearance is not correct, which will cause insufficient intake pressure and quantity; Whether the air filter element is blocked. The supercharger is damaged, resulting in insufficient intake pressure;

2, poor diesel quality, diesel pump and fuel nozzle wear;

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