Both excavator owners and operators hope that their excavators have full power when working. But some people say that after working for a period of time, their excavator's movements become very slow, which not only affects the operator's work mood, but also delays the construction period and affects profits. The excavator moves slowly, so we need to find the reason based on the detailed situation. Below, Liugong excavator parts suppliers will notify you of several reasons that contribute to the slow movement of excavators:
Slow movement of an excavator refers to the phenomenon of slow walking or turning speed and powerlessness exhibited by the machine during operations such as walking or turning.
Classification of the disadvantages of slow excavator movement:
I. Slow single action
Assuming that the speed is relatively slow when performing single operations such as walking, turning, lifting large and small arms, and retrieving digging buckets. There are generally three reasons for this situation, which are detailed as follows:
1. Disadvantages of the component itself
If the performance of the moving components themselves is poor or caused by poor performance during implementation, or if the safety valve pressure of the related components is too low, the excavator operator can disassemble and wash the components to see if there is any jamming or oil leakage, or suspend the pressure test to see if the pressure is normal. After identifying the shortcomings, the maintenance and disposal can be suspended.
2. Disadvantages of conduction process
Defects occur during the command transmission process, hindering the transmission of command signals. At this point, it is important to focus on checking the condition of the pump, pressure sensor, and multi way valve to see if there are any defects.
3. Disadvantages of operating system
The instruction system of the excavator is flawed, resulting in the inability to send signals. This situation is usually quite complex and requires professional maintenance guidance. Operators or maintenance personnel can carefully inspect the relevant pilot oil circuit and solenoid valve oil circuit for any defects.
II. The excavator's overall movement is slow
Assuming that the entire excavator (vehicle) is moving slowly, the LiuGong excavator parts supplier thinks you need to check:
1. Hydraulic system
The hydraulic system is one of the power systems of the excavator. Assuming that the excavator moves slowly, it is necessary to check whether the hydraulic system can be maintained on time and whether the hydraulic oil can be changed when necessary. Outdated hydraulic oil not only affects the working efficiency of excavators, but also corrodes the hydraulic oil circuit and hydraulic components of excavators. At the same time, it is also necessary to check whether there is any blockage in the hydraulic oil circuit and return oil filter element. If there is, the oil circuit should be cleared, and in severe cases, components should be replaced.
2. The power of the initiator is too low
The initiator is also one of the power systems of excavators. The output power of the initiator is too low, and a lack of power can lead to low output power, which in turn causes the excavator to stall and slow down the entire vehicle. In addition, check if there is any black smoke present in the engine. If the fuel injector is severely worn, it will also cause a decrease in engine power and slow excavator movement.
3. Hydraulic pump
Lack of hydraulic pump output can also result in slow excavator operation. This is one of the transmission disadvantages of hydraulic systems. The operator can enter the service diagnostic system to suspend relevant pressure tests and see if the lack of output flow from the hydraulic pump can cause slow excavator movement.
III. The refrigeration unit is normal, but the operation of the heating unit is slow
When the excavator's cooling machine is working normally, but the heating machine is moving slowly, it is necessary to check:
1. Check the oil quality
Check if the fuel used meets the requirements of the excavator. Assuming that the fuel has not been changed for too long or the oil is too dirty, it is necessary to change the fuel. Meanwhile, assuming there are copper shavings attached to the oil inlet filter screen, which may scratch the main pump and cause wear, the filter screen should be cleaned at this time.
2. Filter blockage
Blockage of the filter element can cause poor oil flow, so it is necessary to check whether the pilot filter element, return filter element, and suction filter element can be blocked during inspection. If the filter element is clogged, the clogged material needs to be cleared, and in severe cases, the filter element needs to be replaced.
3. Main pump regulator
Due to the fact that excavators spend most of their daily work time dealing with soil, the pistons of the main pump regulator are prone to oil stains, causing piston blockage and resulting in a decrease in pump pressure and output power of the main pump, causing the excavator to move slowly. Therefore, during the daily maintenance of excavators, it is necessary to clean up the oil stains in various parts.
The slow movement of the excavator is actually a signal to the operator and owner. When the movement is slow, it is necessary to carefully inspect the shortcomings of the excavator and repair it from these aspects, so that your excavator can return to "youthfulness" as soon as possible.
Liugong excavator parts supplier summarizes the reasons for slow excavator movement:
1. Slow single action of excavator refers to the phenomenon of slow speed exhibited by the excavator during single operations such as walking, turning, lifting large and small arms, and retrieving buckets. Common reasons include:
① The overflow pressure of excavator related components is too low.
② Disadvantages of pump pressure sensor.
③ Disadvantages of solenoid valves.
2. Slow overall movement of excavator refers to the slow and powerless speed of the entire vehicle no matter what action the excavator takes. Common reasons include:
① The engine speed is not low enough or the engine power is lacking.
② The output flow rate of the excavator hydraulic pump is too low.
③ The excavator CPU, up and down pressure sensors, solenoid valves, and wiring are abnormal.
④ The hydraulic components of the excavator are abnormal, the oil circuit is abnormal, or there is a loss of flow.
⑤ The pressure value of the excavator pump is too low, lower than the normal value, resulting in slow operation of the excavator as a whole.
⑥ The wear and tear of excavator pump components usually occurs on second-hand or long used excavators. The inspection method is to drain the oil and check if there are iron filings or other impurities in the oil. If there are iron filings, it indicates that the pump components are worn.
⑦ Lack of pilot pressure or shortcomings of PC-EPC solenoid valve.
⑧ Circuit issues. (This issue is commonly associated with the Shengang excavator, which has many circuit problems.).
3. The excavator's heating action is slow in the morning
Under normal circumstances, the slow operation of the cold truck is due to the pressure and flow rate of the excavator pump valve group being lower than the standard value. Therefore, after this disadvantage occurs, it is necessary to measure the pressure value of the pump valve group with a pressure gauge. Assuming that the pressure value is lower than the standard, debugging is required, while measuring the flow rate requires professional maintenance equipment.
4. Slow operation of excavator's thermal engine
Common reasons for disadvantages include:
① The hydraulic oil is too dirty and needs to be changed. When changing the oil, check the inlet filter screen for copper shavings. If there are copper shavings, it indicates that the excavator main pump is worn and needs to be disassembled for inspection.
② The pilot filter element, return oil filter element, and suction filter element are blocked.
③ If the oil and filter are not working, replace them.
④ There is oil sludge on the servo piston of the main pump regulator, and the inclined plate cannot be adjusted. The main pump always works at a small displacement and lacks flow.
More information about excavator accessories can be found on Chuanna Industrial (www.kscna. cn). We hope this article "Liugong Excavator Accessories Tell You What Causes Slow Excavator Movement" will be helpful to everyone. If you still have any questions, please feel free to leave a message or consult Chuanna Hydraulic's national service hotline at 15850333149. We will answer your questions as soon as possible!
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Contact: Mr. Chen
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