The black smoke from the excavator seems to be a small problem, but if it can't be dealt with in time, it may induce the excavator to burn oil, and even cause damage to the four parts of the engine and eventually lead to overhaul.
Failure phenomenon: When a Hitachi ZX200-5A excavator starts, the nozzle of the excavator is always blocked and emits black smoke. The excavator still emits black smoke after replacing the new nozzle.
Failure phenomenon analysis:
1. Black smoke from excavators is generally caused by insufficient and incomplete combustion.
2. At the beginning, the fuel nozzle of the excavator is always blocked and black smoke is emitted.It is recommended to check the oil circuit to see if the hydraulic oil is too dirty or deteriorated.Does the diesel used meet the requirements?
3. The excavator still emits black smoke after the new fuel nozzle is replaced. The analysis may be due to the wrong type of fuel nozzle for the excavator. Although the size of the fuel nozzle of the excavator is about the same, it is not necessarily installed and can be used normally. Because the jetting angle of the nozzle of the excavator is different, if the model of the nozzle is changed, it will cause the black smoke failure phenomenon after the nozzle of the Hitachi ZX200-5A excavator is changed.
4. It is also possible that the problem of air filtration caused the excavator to emit black smoke. The method of elimination is to remove the air filter directly, start the excavator, and observe that the exhaust under the engine does not emit black smoke, if there is no black smoke , Indicating that the air filter failed to cause the black smoke failure phenomenon of the Hitachi ZX200-5A excavator after the oil nozzle was changed; if it continues to emit black smoke, observe whether the excavator burns oil. If there is burn oil, it is the engine The problem.
Supplement: The air filter element of the excavator does not work. The air filter will block the intake air of the engine, resulting in insufficient combustion of the engine diesel. As a result, the Hitachi ZX200-5A excavator still emits black smoke after changing the nozzle.
