Kobelco 230 6E excavator is working hard and emitting black smoke, what s going on?

If it is normal within a few seconds, there is no need to repair it, because the pipe of the pressurized air intake system is long, and the rate of change of air intake cannot keep up with the rate of change of fuel injection, so that black smoke is caused by insufficient combustion in the moment. If there is continuous black smoke, the fuel system should be considered to see if there is a phenomenon of holding the car, the engine does not drop under the number of revolutions, and the EGR valve of exhaust gas recirculation should be considered for the EFI car. In general, it doesn't matter if the black smoke and the hydraulic system are emitted.

Related Notes:The purpose of regular maintenance of the excavator is: to reduce the failure of the machine, prolong the service life of the machine, shorten the downtime of the machine, improve work efficiency and reduce operating costs.

Fuel, lubricants, water and air can be managed to reduce breakdowns by up to 70%. In fact, around 70% of failures are due to poor management.

Learn to learn... Hehe, the problem of black smoke right now is really annoying.

If you smoke and don't hold the car, then you look at your oil nozzle, and whether the oil pump is accurate for fuel supply time. Is the water temperature high? Hold the car, do you look at the hydraulic system, the large pump has a high flow rate? Let's start simple.

What is the cause of black smoke in the diesel engine of Kobelco 260-8 excavator?

Hello, there may be a problem with the engine (incomplete fuel combustion, poor atomization, too much carbon in the piston 2, it may be that the diesel is not completely atomized in the cylinder to cause black smoke, to verify the diesel pump, fuel injector 3, there is a possibility that the hydraulic system is holding the car to cause black smoke 4, focus on whether the supercharger is damaged, if the supercharger failure problem is not big to replace a new one is 5, it may be a problem with the fuel injector (check the fuel injector to see which one has a problem to replace which 6, Also pay attention to the size of the black smoke: if the black smoke is very small, it may be that the air filter is too dirty, or it may be that the diesel filter has not been changed for a long time; If the black smoke is very large, generally speaking, it may be that the diesel combustion is not sufficient, and it is necessary to focus on the detection of the oil pump and the oil nozzle, and it is not excluded that the oil volume of the oil pump is adjusted too much; Hydraulic failure, excessive pressure, banquet Li But if it is a hydraulic failure, the engine will be accompanied by the phenomenon of holding the car at the same time 7, check the air filter element of the excavator, some because the air filter element has a thick dust blockage, which needs to be cleaned or replaced.

There may be a problem with the engine (incomplete fuel combustion, poor atomization, too much carbon deposit in the piston 2, it may be that the diesel is not completely atomized in the cylinder resulting in black smoke, the diesel pump, fuel injector should be calibrated 3, there is a book of grip may be the hydraulic system suffocating the car resulting in black smoke 4, focus on whether the supercharger is damaged, if the supercharger failure problem is not big to replace a new one is 5, it may be a problem with the fuel injector (check the fuel injector to see which one has a problem to replace which 6, Also pay attention to the size of the black smoke in the Sezi car: if the black smoke is very small, it may be that the air filter is too dirty, and it may be that the diesel filter has not been replaced for a long time; If the black smoke is very large, generally speaking, it may be that the diesel combustion is not sufficient, and it is necessary to focus on the detection of the oil pump and the oil nozzle, and it is not excluded that the oil volume of the oil pump is adjusted too much; Hydraulic failure, excessive pressure, but if it is a hydraulic failure, the engine will be accompanied by the phenomenon of holding the car at the same time as the black smoke 7, check the air filter element of the excavator, some because there is a thick dust blockage on the air filter, which needs to be cleaned or replaced.

Summary. Dear, hello, the reasons for the black smoke from the engine of the Kobelco 250 excavator when walking are as follows:

1. If there is black smoke when the excavator is just started, and the black smoke gradually disappears after a period of time after starting, it is a normal phenomenon.

2. If you have any doubts, you can check the excavator three filters (oil filter, diesel filter, air filter.

3. Remove the air filter and check whether the air filter is blocked.

4. The intake resistance of the intake pipe is large, check whether there is a leakage point in the inlet pipe, or the clogging caused by squeezing deformation, and observe the change of exhaust smoke.

5. Replace the diesel filter element and observe the flue gas change of the exhaust pipe.

6. If the injector, high-pressure pump plunger or outlet valve is faulty, observe the flue gas change after replacing the injector.

7. The turbocharger is faulty, and the speed is not enough, which causes the engine to emit black smoke.

The Kobelco 250 excavator emits black smoke from the engine when walking.

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Dear, hello, the reasons for the black smoke emitted by the engine when the Kobelco 250 excavator is walking are as follows: 1. If there is black smoke when the excavator is just started, and the black smoke gradually disappears after a period of time after starting, it is a normal phenomenon. 2. If you have any doubts, you can check the three filters of the excavator (oil filter, diesel oil filter, air filter.

3. Remove the air filter and check whether the air filter is blocked. 4. The intake resistance of the intake pipe is large, check whether there is a leakage point in the intake pipe, or the squeeze deformation causes blockage, and observe the change of exhaust smoke 5, replace the diesel filter element, and observe the flue gas change of the exhaust pipe. 6. If the injector, high-pressure pump plunger or outlet valve is faulty, observe the flue gas change after replacing the injector.

7. The turbocharger is faulty, and the speed is not enough, which causes the engine to emit black smoke.

Summary. Dear, there are possible reasons for the problem:

1. The air filter is blocked, remove the air filter element and clean it.

2. Diesel combustion is insufficient.

3. The atomization of the grease nozzle is not good.

4. The air is not clean.

5. The piston barrel may be worn too much.

6. Improper adjustment of the oil volume of the hydraulic pump.

7. The pressure is wrong.

8. The engine power is insufficient.

9. The hydraulic pump is faulty.

10. The power mismatch of the hydraulic pump of the excavator engine leads to the holding of the car.

Supplement: hydraulic pump, excessive flow (flow regulation function problem) caused by excessive load on the engine, so smoke, many times smoke is the reason, it may also be that the intake is blocked, insufficient suction will also smoke (even the exhaust will be blocked). Check the booster and filter.

The Kobelco 250 excavator emits black smoke from the engine when walking.

Dear, there are the following reasons for the problems of the banquet preparation: 1. The air filter is blocked, the air filter is removed to clean 2, and the diesel combustion is not sufficient. 3. The atomization of the oil nozzle is not good.

4. The air is not clean. 5. The piston barrel may be worn too much. 6. Improper adjustment of the oil volume of the hydraulic pump.

7. The pressure is wrong. 8. The engine power is insufficient. 9. The hydraulic pump is faulty.

10. The power mismatch of the hydraulic pump of the excavator engine leads to the holding of the car. Supplement: hydraulic pump, excessive flow (flow regulation function problem) caused by excessive load on the engine, so smoke, many times smoke is the reason, it may also be that the intake is blocked, insufficient suction will also smoke (even the exhaust will be blocked).

Check the booster and filter.

Ask about custom messages].

You can try to troubleshoot them one by one.

First of all, we should clearly know that the reasons for the black smoke of the excavator are divided into the following types: the pressure of the cylinder is not enough, and the combustion is not sufficient; The fuel injection atomization of the injector is unreasonable; The quality of diesel fuel is too poor; Excessive amount of oil is being spent; The injection is not uniform, and the oil enters the combustion chamber. Excavator black smoke elimination method:

We need to carefully check and adjust the injectors in time to ensure that they can be carried to achieve good atomization and no oil dripping. In addition, the resistance of the engine intake system is reduced, and the air filter element is quickly cleaned to ensure the phase accuracy of the air valve. Then we need to adjust the fuel injection pump on the calibration table to make sure that the adjustment is done correctly, we also need to adjust the appropriate feed lead angle and use the fuel that meets the standard.

Sometimes, because we suddenly press the accelerator, the engine is in normal operation, and it will also cause the phenomenon of black smoke exhaust. If we find that the piston ring is severely damaged during the inspection, we need to replace it with a new one. If the cylinder liner and piston wear are found to be quite serious, we also need to replace them with new parts to ensure that the black smoke fault of the excavator can be solved quickly and effectively.

Depending on your situation, it may be that the excavator cylinder pressure is insufficient and the combustion is not sufficient, causing the excavator to emit black smoke. If you really need to buy a new excavator, it is recommended to choose a good after-sales service, Doosan is very good, and the after-sales service in China is relatively in place, from the purchase of the machine to the equipment work 20,000 hours will have 15 free maintenance, more humane. Everyone wants to make a lot of money smoothly and smoothly, and only a reliable brand like Doosan can help you realize your wishes as soon as possible!

1.Is the air filter half-blocked? 2.

Are the injectors working properly? Degree of atomization, presence or not, leakage, injection pressure? 3.

Is the diesel high-pressure pump injection time correct? 4.Are the intake and exhaust valves working properly?

5.Is the piston ring seal normal?

Have you changed your air filter, if you change it, the basic problems of the school grease nozzle appear here.

If your excavator computer board is gone, or the proportional solenoid valve is dead, there is also a Kawasaki pump. That is caused by the mismatch between the engine speed and the hydraulic pump discharge, you can add a control board to collect the engine speed to the hydraulic pump discharge. One three, two land, one zero, one umbrella.

You can go to this person and ask.