Excavator problem, what is the problem of the excavator not moving?

The high water temperature of the excavator is also called "excavator", and the "high water temperature of the excavator" means that when the water temperature of the excavator exceeds 95 degrees (or exceeds the red line) during the operation, the machine will prompt an alarm. Fault classification: 1. The water temperature of the excavator is high and the pot is boiled 2. The reason for the high water temperature of the excavator and the high water temperature of the excavator is high in the water temperature of the excavator

The operating environment temperature is too high or the excavator is close to the heat source, which may cause the phenomenon. The summer operation of the excavator is very easy to occur, because the temperature of the summer operating environment is very high, so it is necessary to avoid long-term operation in the summer operation, and try to work as little as possible in the case of engine overload and too hot. The heat sink of the excavator radiator is blocked by dust, and the heat dissipation effect is poor, and the excess heat cannot be discharged in time, resulting in high water temperature.

To discharge the fault, it is necessary to check the heat sink frequently and clean the heat sink. Damage to the thermostat or too little opening of the thermostat can also cause high water temperatures. In general, the thermostat can be removed in summer and installed in winter.

The water circulation of the excavator pump is not good, or the pump is damaged, which is caused. There are bubbles in the water tank, the water circulation is not good, and the cylinder gasket is caused by the punch, and the fault can be eliminated by replacing the cylinder gasket. The excavator water tank is too dirty, there is too much scale, and the water circulation is not good.

The excavator fan belt is too loose to affect the circulation, resulting in. Insufficient coolant or problems with the cooling system can also cause high water temperature failures (the concentration of antifreeze ratio may be too high in summer).A broken engine cover can also cause malfunction.

In addition, if the oil temperature of the excavator is too high, the operation time is too long, which will also cause the phenomenon of high water temperature. More, second-hand excavators or excavators that have been used for too long will also lead to phenomena due to different degrees of wear and tear of the four engine matches. Workaround:

1、"Load shedding, low speed"to reduce endothermy. Put the throttle into the first gear to idle to reduce the load and speed, and the heat generated by the friction of each moving part will correspondingly reduce the heat generated by the engine, indirectly reduce the heat absorbed by the coolant, thereby reducing the speed at which the water temperature rises. 2. Increase the air inlet volume of the water tank to accelerate heat dissipation.

Open the side doors on both sides of the excavator to make the air volume of the radiator larger, and the cabin temperature can be quickly dissipated, thereby reducing the speed of water temperature rise. 3. After the temperature drops, check whether the antifreeze in the water tank is missing, and add antifreeze. If you don't have a spare antifreeze nearby, you can add it"Purified or distilled water for human use"Never add river or groundwater.

4. After the temperature drops, clean the radiator. After the temperature drops, check whether there is too much dust between the radiator, condenser and water tank, and clean it thoroughly with high-pressure gas to ensure that the water tank and condenser have good heat dissipation performance. Attention should also be paid to wiping the dust between the condenser and the water tank.

In fact, 80% of the high temperature of excavators is caused by poor heat dissipation. Therefore, thoroughly cleaning the debris on the surface of the radiator and the internal scale and oil scale is the best way to solve the high temperature of the excavator.

Change the diesel and worry about separating the oil, or if it doesn't work, check the pipes of the diesel! As long as the engine speed is normal, it has nothing to do with the hydraulic system.

1. Leakage of slewing joint

The first is the walking weakness caused by the serious leakage of the slewing joint. Hydraulic fluids.

From the upper part of the excavator to the lower part of the walking device, must pass through the rotary joint, when the rotary joint once leaked and damaged, there will be a part of the high-pressure oil flow to the oil return pipe, resulting in walking weakness, affecting the normal operation of the excavator. Therefore, it needs to be inspected to determine if the Hunger Rock is a fault caused by a leak.

2. All kinds of valves are faulty

The inspection of the control valve is also an indispensable link, the safety valve.

Throttle valves, check valves.

Balance valve, relief valve, walking reversing valve, etc., any valve failure, may cause the excavator to walk failure. The fault manifestations of the control valve include the spool of the walking control valve, the short stroke, and the matching gap between the spool and the valve hole.

Faults such as large and reduced pressure of the safety valve will cause weakness to walk on the right.

3. Inspection of the travel motor

When the travel motor is seriously leaked, it can also cause walking weakness. The specific way of eliminating and checking the limb pin is: it can be slowed down to use the digging bucket to support the right track, and the right walking lever is operated in the engine idle state.

When the drive wheel is not rotating, you can hear the "hiss, hiss" sound of the right travel motor, and then touch the oil pipe back and forth with your hand, and feel the oil flowing in the pipe. As the joystick continues to move, the tracks begin to rotate slowly, and as the engine accelerates, the "hiss, hiss" sound intensifies. The left side is checked for the above abnormalities in the same way.

4. Inspection of walking reducer

Poor toothing or lubrication of the reducer is also one of the reasons for the failure of walking weakness. When checking the walking weakness fault, if the power transmission between the walking horses and the driving wheels is normal and there is no abnormal sound, and the oil temperature, oil level and oil quality of the walking deceleration device are also normal, it is said that there is no fault in the walking deceleration and deceleration device, and the walking weakness fault has nothing to do with the walking deceleration device.

1. When there is no action, touch the pilot lock solenoid valve with your hand, and feel that the solenoid valve is very hot, and in some cases, the magnetic force will drop if the solenoid valve is abnormally heated, resulting in the valve core Peiying can not be opened normally. 2. I happen to have an original solenoid valve in my hand, and replace it with a new solenoid valve. Due to the uncertain factors of the failure, by the way, the pilot solenoid valve spool was disassembled, the spool was cleaned, and the test machine was loaded and tested after confirming that there was no problem.

After a period of testing, the excavator failure reappeared. Troubleshooting of the pilot solenoid valve and electrical circuits. 3. After asking the owner, the last time when the main pump parts were replaced, the hydraulic oil was not replaced, and the hydraulic oil was dirty.

The owner said that the hydraulic oil and filter elements had not been replaced, and the hydraulic oil was not dirty. 4. Open the hydraulic oil tank cover, pull out the oil suction filter element, and find that there are copper chips stuck on the filter element. Immediately let the owner replace the hydraulic oil and filter element, clean the hydraulic oil tank, test again, when there is no action failure, the pressure of the whole car is close to zero, the pilot pressure is normal.

5. After turning off the power supply of the whole car, start the machine again, and the pressure of the whole car can be restored to the pilot pressure. It is such a fault phenomenon that leads to a misjudgment of circuit and electrical faults at the beginning, and it takes a detour. 6. Because the pressure is zero, it is suspected that the main safety valve is faulty, and the main safety valve is removed and the valve core is found to be stuck, but it is not stuck, and there is a very fine metal foam inside.

After cleaning and grinding the valve core of the relief valve and re-installing it, there was no failure for more than half an hour of test time.

Excavator failure pro, hello! Excavator is the main construction machinery in earthwork engineering, which is widely used in construction, road construction, water conservancy, open-pit mining and national defense engineering. If the excavator is not maintained in time, there may be a variety of failures, I based on my own practical experience, the following analysis of the common faults of the excavator, for reference only.

1 The excavator cannot be started or it is difficult to start the electrical system failure The battery is insufficient, at this time, the battery should be charged in time, the liquid level of the battery should be checked, and the electrolyte should be replenished to the specified height in time. If it is found that the battery is aging and poorly charged, the battery should be replaced, and at the same time pay attention to the daily maintenance of the battery, and do not let the battery often be in a state of power loss. Starter Failure Repair or replace the starter.

Generator Failure Repair or replace the generator. Line Failure Check the line and fix it. Engine oil circuit failure Low pressure oil circuit air resistance Under the suction action of the fuel transfer pump or fuel injection pump, the fuel is sent from the fuel tank to the high-pressure pump through the low-pressure oil circuit.

If the low-pressure oil circuit is not tightly closed, or the oil level in the fuel tank is too low, and the vehicle is parked and driven at an angle, the air will take the opportunity to enter the oil circuit; If the temperature is high and the fuel evaporates, it will also form air resistance in the low-pressure oil circuit, resulting in unstable engine operation, automatic shutdown or engine failure. Oil circuit blockage The common parts of oil circuit blockage mainly include the suction pipe in the fuel tank, the filter screen, the diesel filter, the fuel tank cover vent, etc. The main problem with the blockage of the oil circuit is the injection of substandard diesel or the mixing of impurities during the refueling process.

The key to prevention is to ensure that the diesel is clean and the oil circuit is sealed, the oil circuit is regularly maintained, the cleaning and maintenance of the diesel filter is strengthened, the filter element is cleaned or replaced in time, the fuel tank is cleaned in time according to the operating environmental conditions, and the oil sludge and water at the bottom of the fuel tank are completely removed. Failure of the fuel injection pump The plunger and the oil outlet valve of the fuel injection pump are seriously worn, which makes it difficult to start the engine. At this time, the plunger and the oil outlet valve should be replaced in time.

2 The excavator is weak The engine has enough power and runs normally, while the excavator works slowly and digs weakly. The hydraulic pump of the excavator is mostly a variable piston pump, after working for a certain time, the internal parts of the pump are inevitably worn, and the internal leakage is caused by the argument, and the parameter data are not coordinated, resulting in insufficient flow, the oil temperature is too high, the speed is slow, and the high pressure can not be established, so the action is slow and weak. For this kind of problem, the hydraulic pump must be removed for data measurement, the problem is confirmed, the accessories that can not continue to be used are replaced, or the accessories that can continue to be used are repaired, and the calibration bench is debugged after reassembly, and the parameters of each circuit (pressure, flow, power and variables, etc.) are matched.

An important hydraulic component on the excavator is the multi-way distribution valve, which has the main safety valve, the secondary valve, the relief valve, the oil filling valve, etc. If the pressure set by these valves does not reach the standard pressure, the excavation will not be effective. Hope it helps!

How much do you know about excavators?

Do you know the following questions about excavators?

How to judge the size of an excavator? What are the indicators of liquid posture? What are the working devices of the excavator? What does the performance of the excavator depend on? What are the working characteristics of an excavator?

After reading the following, you will be able to understand the above questions about excavators!

Search for images. Please click to enter a description (up to 18 words).

First, the main indicators of the size of the excavator.

1.Standard bucket capacity: unit, cubic meters.

2.Machine weight: unit: tons.

3.Engine rated power: single command: kw.

Second, the excavator working device.

The working device is an important part of the excavator, and the common types of work are as follows:

1.Backhoe excavator - mainly excavates underground.

2.Front shovel – mainly digging above the ground.

3.Loading - Mainly loading loose materials above the ground.

4.Grab-deep well operation, loading and unloading materials.

5.Lifting device - mainly used for loading and unloading, that is, laying pipelines.

3. Excavator performance and excavation force.

1.The performance of the excavator depends on the actual digging force, productivity and working size of the bucket teeth.

2.As far as the working device is concerned, it boils down to three aspects: digging force, working speed, and working size.

3.Excavation force and excavation speed are a pair of contradictions unified under pure excavation force, and excavation force is the main aspect of the contradiction.

Search for images. Please click to enter **Description (up to 18 words) four. Working characteristics of the excavator.

1.Multi-DOF working machine.

2.Using the lever principle, the hydraulic cylinder pushes the boom, bucket, and bucket to produce relative rotation between parts to realize manual excavation and unloading.

3.The upper rotating platform rotates around a vertical axis.

4.Long-distance cantilever excavation and unloading.

5.Rely on the track belt to transfer or move the working surface of the whole machine.

Opening an excavator involves a lot of technical actions, and the excavator is also one of the most functional parts of all construction machinery, so an excellent excavator driver must master a variety of operating skills, loading, digging trenches, brushing slopes, throwing soil, picking up leveling, trimming, etc.

Although the excavator is a technical job, but if the emotional intelligence is too low, not good at communicating, it is difficult to gain a foothold in the industry, a mature excavator driver must have the ability to expand contacts, because in the excavator industry, personnel changes are relatively large, today with the engineering team to work, tomorrow may go to work with another boss, so in the industry, technology is important, but communication is also essential.

Excavator driving is a technical work, so, if you do not operate for a long time, it is easy to cause technical regression, some drivers rely on their own good technology, work fast, often do a period of time to play for a few months, in this way, no matter how good the technology is difficult to progress, and even will be degraded, in the long run, will be surpassed by others or even replaced.

Although driving an excavator is a relatively free job, it does not mean that you can rest at any time, even if the level is high, you must practice from time to time, otherwise no matter how good the technology will be degraded, no matter how good the reputation will be gradually forgotten.

The main performance of slow excavator action is roughly divided into: slow single action, slow action of the whole vehicle, slow action of the heat engine. We will make a specific analysis of the above three issues.

Analyze the causes. 1. Check whether the pressure of the relief valve of the relevant components of the excavator is too low;

2. Check whether the pump, low-pressure sensor and multi-way valve are faulty;

3. Whether there is a fault in the relevant solenoid valve and valve core.

Hunter drivers share solutions.

1. First of all, check whether the whole machine is maintained on time and whether the hydraulic oil is replaced on time; Whether the hydraulic oil circuit is blocked, please check the system pressure at idle speed, and check whether the oil return filter element is blocked;

2. The output power of the engine is too low, and the power is insufficient, please combine the DX data to analyze the output of the engine, and whether all cylinders can work at the same time; Check whether there is black smoke in the engine, if the fuel injector is seriously worn, it will also cause the engine power to decrease;

3. If the output of the hydraulic pump is insufficient, the relevant pressure test can be carried out when entering the service diagnosis system;

4. Insufficient pilot pressure causes insufficient pressure to open the valve core, resulting in insufficient flow and slow action;

5. Eliminate whether there is a circuit problem, and check the excavator CPU, high and low voltage sensor, solenoid valve and line faults.

6. Check the oil in time to check whether the oil is clean, and replace it immediately if there is dirt; The oil is too dirty and needs to be replaced; Check whether there are copper chips on the oil inlet filter, which causes the main pump to wear, and it is necessary to disassemble the chain car to check.