Why does the Komatsu excavator suffocate every action?

Common reasons for the failure of Komatsu excavator to hold the car and stall the car:

1 There is a problem with the computer board of the Komatsu excavator.

2 Or there is a problem with the solenoid valve of the excavator.

3 There is also the air filter of the excavator is dirty or broken.

4 The oil circuit of the Komatsu excavator engine is blocked.

5 Diesel ** is not enough, air intake.

6. The hydraulic oil filter is blocked.

7 The modem is stuck.

8 In addition to the above reasons, the diesel used by the Komatsu excavator is too poor, which will also cause the excavator to stall.

1. First of all, you should check whether the throttle cable is loose when holding pressure at high speed, if there is an electrical fault (the fault is omitted on the electrical side), if not, enter the following steps.

2. Check whether the oil filter is blocked, replace the diesel filter, including coarse filter and fine filter, check the air filter and air intake pipe, and replace the air filter or intake pipe if necessary.

3. If the fault phenomenon is still after replacing the filter element, you should check whether there are foreign objects in the oil tank and the low-pressure oil circuit joint, and the specific method is to disassemble the oil circuit or joint to check whether there are foreign bodies.

4. If the fault is still after the above inspection, you can disassemble the old oil injection on the same oil pipe, and hold the pressure at high speed to see whether the oil return volume of the same oil pipe is significantly reduced when the speed is lost or the flame is turned off, if it is significantly reduced, it is still the engine oil circuit problem, if it is not significantly reduced, it is the power of the hydraulic pump is too large.

5. If the oil return is significantly reduced, the low-pressure pipeline or oil pump should be replaced.

6. Check the regulator of the main pump of the hydraulic system if necessary.

7. The last inspection of this machine is that the glue layer inside the pipeline from the fuel tank to the diesel coarse filter falls off, and the machine works normally after replacing the pipeline.

Holding the car is actually either a problem with the circuit, or a problem with the hydraulics, or a fault with the engine, but in fact, the probability of these problems is not large, mainly caused by the mismatch between the output power of the computer board and the power of the hydraulic pump!! However, this kind of easy solution can be done by adding a pump control board directly.

1. The first thing that needs to be checked is the oil supply circuit of the excavator to check whether the oil supply is smooth. Is there any blockage in the oil circuit? It is recommended to clean the fuel filter, replace all the filter elements, disassemble and inspect the diesel pump, and check whether the fuel injection length of the nozzle can reach about 6 7cm.

2. Then, it is necessary to check whether the engine is overloaded or overheated due to the long-term operation of the excavator engine, and the engine self-protection function is started. 3. It is recommended to carefully check whether there is air leakage or oil leakage in the oil circuit, check whether the pipe joint seal is damaged, check whether the filter element is stuck, and check whether the drain cover of the oil-water separator is tightened. 4. Suffocating the flame may also be a hydraulic problem.

Specifically, it is caused by the mismatch between the hydraulic pump and the engine power, which needs to be measured with professional maintenance equipment, and professional equipment is used to debug the pressure of the valve group. The excavator automatically turns off itself, and the common reasons are: 1. Lack of fuel causes self-extinguishment.

2. There is leakage and oil leakage in the excavator oil circuit, and the fuel injection pump is faulty. 3. The excavator turns off by itself, if there is a black smoke phenomenon in the exhaust pipe where the engine speed gradually decreases, it is likely to be caused by the unsmooth oil supply of the excavator oil circuit, poor engine lubrication, and engine shaft burning. 4. If the excavator suddenly turns off by itself during operation, it may also be that the diesel is not clean, so it is recommended to replace the diesel filter element first and correct the fuel injector.

Hello, happy to answer your questions. The reasons why the Komatsu excavator vehicle has no action: 1. First of all, the engine, and then the pressure of the large pump, generally the number of Tong is stupid to say that the pressure is insufficient to cause the vehicle to have no action; 2. Check whether the vehicle is leaking, repair wear parts or replace seals; 3. Check whether the pressure of the hydraulic system can reach the highest value; 4. Check whether the pump variable mechanism is working normally; 5. Check whether the pilot pressure is normal; 6. Generally, the pressure of the system cannot be raised, and the relief valve of the main valve is faulty or damaged; 7. Check the hydraulic pipeline of the small arm and the main valve to see if there is any damage or blockage; 8. There may be gas in the fuel tank that cannot be discharged, and the gas needs to be discharged; 9. Find a professional repair shop for the hydraulic pump and debug it on the hydraulic debugging platform; 10. There may also be a blockage of the oil circuit, the main reasons are:

may have previously been injected with inferior or incorrect type of diesel; There are also impurities mixed in the process of refueling; 11. It is also possible that the hydraulic oil has deteriorated, so pay attention to maintaining the cleanliness of the hydraulic oil.

Summary. Yes, oh dear, the excavator engine operates under heavy load, and the engine will also be held by the engine due to insufficient oil supply. You can try to troubleshoot by adjusting the flow rate of the oil pump.

Hello dear, why does the Komatsu excavator suffocate every action? It may be caused by the failure of the large hydraulic pump.

There is also a hydraulic pump regulator variable that will also cause the excavator to hold the machine and turn off the fault.

It may also be caused by poor fuel supply, check the oil duct for blockages and air leaks.

Also check whether the confluence valve of the solenoid valve is stuck.

It's okay to do some light work, but it's okay to put out the fire when you do heavy work.

Yes, oh dear, the excavator dismantles the engine to operate under heavy load, and the engine will also be held by the engine due to insufficient fuel supply. You can try to adjust the flow rate of the oil pump through the slag control to troubleshoot.

How much is appropriate.

The output flow rate is 214lmin*2 and the set pressure is 380kg cm2.

How to judge the failure of the large pump.

The sound of the hydraulic pump is abnormal or significantly increased, and the machine is running poorly.

It can also be judged by the flow rate of the hydraulic pump measured by the hydraulic system tester.

Is there a difference between increasing the flow rate of the oil pump and increasing the relative throttle to the maximum?

There is a difference, oh dear.

If the flow rate of the excavator pump is increased, the load on the engine will increase and the car will be suffocated.

I'm referring to diesel pumps.

Yes, oh dear, increasing the pump flow rate can increase the oil supply of the excavator's cylinder, which is about the same as increasing the throttle to the maximum.

The maximum throttle will still hold the car and turn off, is it possible to rule out the problem of small flow of the oil pump and insufficient fuel supply.

Yes, dear. But you still need to eliminate them one by one.

I also need to check the solenoid valve.

Reasons: 1. The calcined fuel forms a self-extinguishing fire.

2. There is oil leakage and leakage in the excavator oil circuit, and the fuel injection pump is faulty.

3. The excavator turns off by itself, if there is a black smoke appearance of the exhaust pipe gradually decreasing the engine speed before, it is likely that the oil supply of the excavator oil circuit is not smooth, the engine is smooth and poor, and the engine is caused by the burning of the shaft.

4. The excavator works on its own, or it may be that the diesel is not clean, so it is advisable to replace the diesel filter element first, and then the fuel injector of the school team.

5. If the Qingxiang excavator is active after the hot car, and the excavator can not be started in a short period of time after the ignition, it is likely to be a diesel pump (high-pressure oil pump) or grease nozzle question, at this moment can use cold water to flush the diesel pump, if it can be played immediately, it is a problem with the oil pump or grease nozzle.

6. Engine question: the engine has high air intake resistance and oil intake obstruction, resulting in self-extinguishing appearance.

7. Hydraulic system question: the pump pressure is too large.

8. Question about the excavator's reputation and posture device: the control system takes the initiative to turn off because of the wrong signal.