Explanation:
The slow action of a digger is a slow or incapable phenomenon of a machine running or turning when operating or operating a rotary operation.
Fault classification:
1 excavator single action slow
2 excavator full vehicle / vehicle movement slow
The 3 excavator is slow in the morning.
The slow motion of the 4 excavator
The reason for the slow motion of the excavator is:
1 the slow motion of a single excavator is a slow phenomenon in the single operation of a excavator, such as walking, turning, lifting the size arm, and recovering the bucket. Common reasons are:
(1) the overflow pressure of the related components of the excavator is too low.
Pump pressure sensor failure.
(3) the malfunction of the solenoid valve.
2 the slow speed of the whole excavator / vehicle is that no matter what action the excavator does, the speed of the whole car is very slow.
(1) the engine speed is not too low or the engine power and power are insufficient.
The output flow of the hydraulic pump in the excavator is small.
3. Excavator CPU, high and low pressure sensor, solenoid valve and line abnormal.
4. Abnormal hydraulic components of excavators, abnormal oil flow or loss of flow.
The pressure value of the excavator pump is too small, which is lower than the normal value, resulting in the slow action of the whole excavator.
The component of the pump is worn, which is often used or used for a long time. Check the method to see if there is iron or other impurities in the oil. If there is a magazine of iron, it shows that the pump assembly is worn.
Insufficient pilot pressure or PC-EPC solenoid valve failure.
Circuit problems. (this problem is often associated with Kobelco excavator, Kobelco excavator circuit problems).
The 3 excavator is slow in the morning.
In general, the slow motion of the cold car is caused by the pressure flow of the pump valve group below the standard value, so it is necessary to use the pressure gauge to measure the pressure value of the pump valve group. If the pressure value is lower than the standard, it needs to be debugged, and the measurement flow needs to use the professional maintenance equipment.
The slow motion of the 4 excavator
The common causes of failure are:
The hydraulic oil is too dirty, need to change oil, check the oil filter screen when changing the oil, check whether there is copper chip, if there are copper chips that indicate the main pump of the excavator is worn, it needs to be dismantled.
2. Pilot filter element, oil return filter element and oil absorption filter block.
Oil and filter core can not be replaced.
4. There is oily sludge on the servo piston of the main pump regulator, and the swashplate can not be adjusted. The main pump works in small displacement and the flow is insufficient.
