What are the reasons for the slow action of excavator

If the excavator moves slowly, we need to find out the reason according to the specific situation. Next, I will tell you several reasons for the slow action of the excavator:

The slow action of excavator refers to the phenomenon that the speed of moving or turning of the excavator is slow and powerless when it operates walking or turning.

Fault classification of excavator slow motion:

Slow single action

If it is a single operation, such as walking, turning, lifting the big and small arms, retracting the bucket, the speed is relatively slow. There are generally three reasons for this situation, as follows:

1. Component failure

That is to say, the performance of the action parts is poor or the performance is poor during the implementation process, or the pressure of the safety valve of the relevant components is too low. The excavator hand can remove and wash the parts to see whether there is stagnation or oil leakage, or carry out pressure test to see whether the pressure is normal. After the failure point is determined, carry out maintenance.

2. Conduction process failure

That is to say, there is a fault in the process of command transmission, which hinders the transmission of command signal. At this time, it is important to check the condition of pump, pressure sensor and multi way valve to see if there is any fault.

3. Operating system failure

That is to say, the command sending system of excavator fails, resulting in the failure of signal sending. This situation is generally complex and requires professional maintenance guidance. The operator or maintainer can carefully check whether the relevant pilot oil circuit and solenoid valve oil circuit are faulty.
The excavator moves slowly

If the excavator moves slowly, you need to check:

1. Hydraulic system

The hydraulic system is one of the power systems of the excavator. If the excavator moves slowly, check whether the hydraulic system is maintained on time and whether the hydraulic oil is replaced regularly. Expired hydraulic oil will not only affect the working effect of the excavator, but also corrode the hydraulic oil circuit and hydraulic components of the excavator. At the same time, check whether the hydraulic oil circuit and return filter element are blocked. If any, the oil circuit shall be cleaned, and parts shall be replaced in case of serious problems.

2. Engine power too low

The engine is also one of the power systems of the excavator. The output power of the engine is too low, and the lack of power will lead to the low output power, and then the excavator will hold the car, making the whole excavator move slowly. In addition, check whether there is black smoke in the motor. If the nozzle is seriously worn, the engine power will be reduced and the excavator will move slowly.

3. Hydraulic pump

Insufficient output of the hydraulic pump will also cause the excavator to move slowly. This is one of the conduction faults of the hydraulic system. The manipulator can enter the service diagnosis system for relevant pressure test to see if the excavator moves slowly due to the insufficient output flow of the hydraulic pump.
The cold engine is working and the hot engine moves slowly

When the excavator works well when it is cold and the heat engine moves slowly, it needs to check:

1. Check oil products

Check whether the fuel used meets the requirements of the excavator. If the fuel has not been replaced for too long, or the oil is dirty, the fuel needs to be replaced. At the same time, if the oil inlet screen is attached with copper scraps, the main pump will be scratched to form wear, at this time, the screen should be cleaned.

2. Clogged filter element

If the filter element is blocked, the oil circuit will not be smooth. Therefore, check whether the pilot filter element, return filter element and suction filter element are blocked. If the filter element is blocked, it is necessary to clean up the blocked substance and replace the filter element if it is serious.

3. Main pump regulator

Because the excavator works with soil most of the time, the piston of the main pump regulator is easy to be stained with oil, which causes the piston to block, reduces the pump pressure of the main pump, reduces the output power, and makes the excavator move slowly. Therefore, when the excavator is in daily maintenance, it is necessary to clean up the oil stains on all parts.

In fact, the slow action of excavator is also a signal to the manipulator and the owner. When the action is slow, you must carefully check the excavator's fault, and repair from these aspects, so that your excavator can return to "young" as soon as possible.