What s going on with the excavator holding the car, and what is the reason why the excavator is hold

1: The diesel oil circuit is blocked or blocked.

2: The fuel pump is faulty and the pump needs to be calibrated.

3: The failure of the hydraulic pump adjustment mechanism and the excessive flow rate lead to the suffocation of the car.

Find a professional excavator with a good reputation in the industry to show you.

It's not something that can be discerned in a few words.

1. Failure of the hydraulic pump.

2. The problem of two valves of the excavator.

3. The hydraulic pump regulator variable is chaotic, and the excavator will hold the machine and turn off the fault.

4. Whether the confluence valve of the solenoid valve is stuck.

5. If there is too much hydraulic oil, the excavator will also be out of flame.

6. If the fuel supply is not smooth, check whether the oil duct is blocked and leakage.

Second, the corresponding fault maintenance:

1.Although you say that there is no problem with the inspection, it is recommended to start with the most basic fuel circuit cleaning and replacing all the filters. The diesel pump dismantles the oil outlet line to see if the fuel injection length can reach about 6 7cm.

2.The small arm and the walking are mainly oil supplied by the pump 2, and the regulator of the lower pump 2 is mainly checked and cleaned.

3.90% of the car is a fuel circuit fault, it is best to carefully check the oil circuit to confirm whether there is any air leakage, such as the pipe joint seal is damaged, the filter element is not in place, and the drain cover of the oil-water separator is not tightened. It is possible to use a direct connection to the tank test.

The following are the common reasons for the failure of the excavator to stop the car summarized by the Guoxiang excavator maintenance master: 1 There is a problem with the computer board of the Volvo excavator. 2 Or there is a problem with the solenoid valve of the excavator. 3 There is also the air filter of the excavator.

It's dirty or broken. 4 Volvo excavator engine oil circuit blockage. 5 Diesel ** is not enough, air intake.

6. The hydraulic oil filter is blocked. 7 The modem is stuck. Further reading:

Generally, the phenomenon of Volvo excavator suffocating and dismantling the grinding vehicle is due to the hydraulic pump of the excavator.

The power is greater than the power of the engine, so it leads to the phenomenon that the excavator holds the car and even stalls. Therefore, after the failure occurs, it is necessary to first check whether the power of the hydraulic pump of the excavator and the power of the engine match. The way to check can be to turn the power of the excavator's hydraulic pump a little lower, and then see if the Volvo excavator is working normally - if it is still not normal, then say that Duan Leadming is not a hydraulic pump.

The excavator is idle and stalls, which is often caused by factors such as the fuel injector of the engine being too dirty or the fuel filter element being too dirty.

There are 8 reasons why the excavator holds the car as follows:

1. The engine power does not match the power of the hydraulic pump.

Brake failures are, of course, closely related to the engine, which is usually caused by a drop in engine power. If the engine power is lower than the power required by the hydraulic pump, then check the fuel system and air intake system for problems. In addition, problems with the oil pump can also lead to a decrease in engine power, which usually requires a school oil pump, replacement of the plunger nozzle, etc.

2. The engine air intake is insufficient.

When the excavator's engine is under-intake, it can also cause braking. There are many other reasons for insufficient air intake, such as severe wear and tear on the supercharger, clogged air filters, incomplete operation of the supercharger, and leaking exhaust manifolds. If necessary, the supercharger needs to be replaced.

3. Braking caused by heavy objects.

Insufficient engine oil** is also one of the reasons for excavators. When the engine is working under heavy load for a long time, the oil** will be insufficient. At this point, the pump flow can be adjusted to eliminate braking. Remember not to work under heavy load for long periods of time.

4. Petroleum issues.

The failure of the excavator brake is related to the oil. If there are too many oil impurities, the oil circuit will be blocked, the filter will be clogged, there will be too many impurities in the fuel tank, and the engine power will decrease. Long-term use of engine oil with large amounts of impurities can damage the excavator and cause braking.

Also, if the type of oil chosen doesn't match and mismatched parts are installed, it can cause braking. It is recommended that you choose regular attachments and high-quality oil.

5. Fuel system problems.

If the long-term use of low-quality oil will cause a large amount of impurities to appear at the bottom of the tank, the tank should be cleaned regularly to clean the position of the oil line and oil joint. In addition, the oil-water separator should not be overlooked. The drain valve at the bottom should be opened periodically to release water.

Otherwise, too much water storage will cause the excavator to move.

6. The dirt of the large pump regulator is caused by the brake.

When working for a long time and ignoring the grease formed around the large pump regulator, the regulator becomes clogged, causing the large pump regulator to not work properly, resulting in braking. At this point, you can remove it for cleaning or replacement.

7. The circuit is abnormal, and there is a car phenomenon.

The oil circuit inspection is very important, and the oil circuit must not be forgotten. Sometimes, when the circuit is abnormal, it causes the machine to brake. When braking, first check if it's an engine problem or a hydraulic system problem. If both are fine, check if the electrical components are abnormal.

8. Wear and aging of parts.

In the process of troubleshooting the excavator, the wear and tear of the components must not be overlooked. When there is no problem with the power of the engine and pump, you also need to check whether the engine cylinder liner piston is worn out, and the engine and other parts of the hydraulic system are leaking.

What should I do if the excavator holds the car with two arms.

Hello, there are three manifestations of the excavator holding the car, so the slag barrier has three forms, namely: 1, the hot car holds the car 2, the cold car holds the car 3, and the cold car and the hot car are holding the car. Different car holding faults, the causes are also different, the following will analyze the Huaimin three kinds of car holding faults are caused by what factors.

Analysis of the causes of the failure of the excavator hot car When the excavator hot car is found to be faulty, it needs to be repaired in time, and the common causes of the failure are mainly the following five aspects: 1. If it is accompanied by black smoke, it may be that the excavator oil circuit, oil pump, engine air intake, engine three filters, etc. are faulty. 2. It may be that the hydraulic pump or distribution valve is leaking, causing the pump power to be greater than the engine power.

3. It may be caused by oil road problems, and the oil circuit should be checked in time, which may be caused by oil deterioration or too dirty. 4. It may be caused by the increase of internal leakage of the high-pressure oil pump, and the oil pump needs to be calibrated. 5. It may be due to the wear of the pump regulator, the excessive pressure and flow of the pump valve group, the wear and tear of the internal components of the pump, etc.

Analysis of the causes of the failure of the excavator cold car I hope my reply can help you, if you have any follow-up questions, please ask me, I will reply to your <> as soon as possible

Hello pro The excavator holds the car as soon as it is forced, which is usually caused by the following reasons:1The hydraulic oil volume of the excavator is too low or the hydraulic oil pump is faulty2

Hydraulic cylinder seals are aging or malfunctioning and cause oil loss3The hydraulic oil return pipe and oil circuit of the excavator are blocked by oil scale 4The workaround for improper use by the operator or excessive operation time is usually:

1.Check the amount of hydraulic oil of the Duxiang closing machine, ensure that it is sufficient and replace the oil on time, and check whether the hydraulic oil pump is faulty to repair or replace 2Check whether the hydraulic cylinder seal of the excavator is aging and cracked, and replace it in time3

Clean the hydraulic oil return pipe and oil circuit of the excavator to deposit oil scale 4Appropriately strengthen the training of operators, reduce the time of banquet and less operation, and avoid improper operation. If the above methods do not solve the problem, it is recommended that you ask a professional technician to carry out a more comprehensive overhaul and maintenance.

There are two common causes of failure:

First of all: the power of the hydraulic system of the excavator (mainly from the hydraulic main pump) and the power of the engine do not match may cause the excavator to hold the car, and the power of the hydraulic system of the excavator and the power of the engine do not match the cause of what is the cause?

1. The power of the hydraulic pump of the excavator has increased abnormally (the engine power is normal at this time). There are five reasons for the increase in the power of hydraulic pumps:

1) The temperature of the hydraulic oil increases abnormally, resulting in the thermal expansion of the parts of the servo mechanism of the hydraulic pump.

2) The regulator is worn and aged, and the internal leakage is serious, so that the required power feedback is interrupted in the adjustment.

3) The hydraulic pump sensor fails (the positive control system is more obvious), and the negative control has little impact.

4) The first pressure is insufficient to malfunction the regulator feedback system.

5) The servo mechanism inside the hydraulic pump is worn, stuck and leaked.

2. The engine power of the excavator is seriously reduced. There are four reasons for the decline in the power of the excavator engine:

1) Engine electronic signal transmission system (mainly for models with a higher degree of electronic control) sensor failure, such as temperature sensor, speed sensor, throttle motor position sensor, EGR (secondary cycle sensor) sensor, etc., to see how the power and hydraulic power of the engine are matched, that is, the electronic optimization system asks for those engine signals to make the dynamic power of the engine change and the dynamic power required by the hydraulic system match.

2) The low-pressure fuel system is blocked (mainly including the blockage of the internal filter element and the external filter element of the fuel tank) or the pipeline is not tightly sealed to enter the air.

3) Fuel quality problems.

4) The intake and exhaust system is not smooth (the air leakage at the joint of the turbocharger and the air cold intake system will make the engine power insufficient, but at this moment, it is generally accompanied by black smoke when the engine is medium and high load), the valve clearance is too small or too large, and the valve clearance is too small to cause the insufficient power of the hot car engine, so as to heat the car and hold the car.

Secondly, the electronic control system of the excavator with a high degree of electronic optimization can not be ignored, the line is short-circuited, broken, and the computer is damaged, which may lead to the excavator holding the car, and the general use time of more than 10,000 hours of the model is easy to burn the sensor, actuator and computer due to the aging of the line. If your hydraulic pump has been cleaned, but there is still an excavator holding fault, then you should consider whether your excavator pressure regulation is appropriate, and whether the hydraulic pump is disassembled and found any problems. Sometimes the pressure of the excavator is adjusted too much, which will also cause the excavator to hold its hands and laugh and the car malfunction.

Repair Method:

1. The excavator is overloaded, and it is recommended to check the pump pressure and flow.

2. If the oil circuit is not smooth, it is impossible to touch the diesel oil discharge, and check whether the fuel tank cover is blocked.

3. It may be that the engine power has decreased, check the oil circuit.

5. Or the valve similar to the balance valve in the walking system is stuck and not opened, that is, the oil circuit is not passable, and the excavator is holding the car when walking.