The domestic excavator parts Chuanna is summed up as follows for the sudden automatic flameout of Komatsu excavator diesel engine:

Disadvantages: When the Komatsu excavator is working, the diesel engine suddenly turns off automatically during operation, and the excavator cannot work normally.

Disadvantage diagnosis:

1. At the beginning, I thought it was because the excavator was out of diesel, so I checked the excavator diesel and found it was not. So I started the excavator here, but it still didn't catch fire, and I couldn't hear the "squeak and squeak" sound of the fuel injector.

2. So check the oil circuit of the excavator, and there is no blockage in all parts. So the maintenance master removed the injector and took it to the test bench for inspection, and the injector was also working normally. But after a period of time, the excavator will automatically turn off. At the same time, there are still bubbles in the high-pressure oil circuit.

3. So, check all the oil pipe joints again, there are no leaks, and the joints are well sealed. Therefore, the suspected problem may lie in the fuel injection pump. Therefore, the low-pressure oil path from the fuel tank to the fuel injection pump is filled with diesel, and then a certain pressure is applied to the pipeline connecting one end of the fuel tank. As a result, oil was leaking from the set screw of the plunger sleeve of the oil pump.

4. After removing the screw, it was found that the copper washer was seriously damaged, and the positioning groove was just connected to the oil return hole of the fuel injection pump. In this way, when the fuel injection pump starts to work when the plunger goes down, the upper cavity space of the plunger increases to generate suction, and the low pressure oil and the outside air from the positioning screw are simultaneously sucked into the plunger sleeve. When the fuel injection pump pumps oil, it will press air into the high-pressure oil pipe. In this way, air bubbles are generated in the high-pressure fuel pipe, preventing the diesel from flowing into the fuel injector, and the diesel engine will automatically turn off.

The reason for the disadvantage: the copper washer of the set screw on the fuel injection pump is worn out, which leads to the occurrence of defects.

Repair method: Chuanna, the domestic excavator accessories, immediately change the copper washers of the positioning screws.

In addition, many novice drivers ask Komatsu excavators whether there are any precautions that need to be paid attention to when walking.

The domestic excavator accessories Chuanna summarizes the following aspects of walking operation:

1. Before the excavator starts, check the environment and safety, clear the obstacles on the road, and separate the excavator, and then raise the bucket.

2. Try to choose a smooth road, drive at a low speed when turning, and operate as much as possible when turning a big turn.

3. The walking motor of the excavator prevents collision or stranding on the boulder and prevents the application of extra force on the crawler part.

4. Assuming that when the walking pole is parked on a slope, the bucket should be lowered even if it is parked for a short time, and the bucket teeth should be inserted into the soil. When the excavator starts in the low speed range, 5. The engine speed will suddenly increase, so the driver should pay attention to operating the walking stick.

6. When the excavator is walking in the bad air, it is necessary to avoid the rock hitting the walking motor and the crawler frame. Mud, sand and stones entering the crawler venue will affect the normal walking of the excavator and the service life of the crawler

7. When walking in the water, the depth of the water must not pass over the track shoes on the side of the sprocket wheel, and full attention should be paid to the state of the river bed and water potential.

Domestic excavator accessories Chuanna believes that the excavator's walking is very important to the service life of the excavator, so be careful during the operation!

For more information about excavator accessories, please visit Chuanna Industrial (www.acgway.com). I hope this "Domestic Excavator Accessories Interpretation of Komatsu Excavator Diesel Engine Sudden Automatic Stop and Precautions When Running" is helpful to everyone. If you still don’t understand, you can directly leave a message or consult Chuanna Hydraulics National Service Hotline 15850333149, we will solve your doubts as soon as possible!