1. Analyze the temperature of the working environment of the small excavator and also analyze the maximum load that the working object of the small excavator can bear.
2. After making an accurate judgment, select the appropriate brand of hydraulic oil based on the ambient temperature of the small excavator's operating area and the load conditions of the small excavator's working object.
3. Replace and maintain the filter element regularly, and pay attention to purchasing genuine hydraulic oil.
4. When the boom phenomenon occurs during operation, you can first reduce the pressure of the boom (less than the normal pressure) and observe whether the boom will fall quickly?
5. If the falling speed is very fast, it is recommended to replace the boom oil seal.
6. If the fault still exists after replacing the oil seal, you need to check the boom oil return safety valve.
7. Check the pressure value of the excavator pump valve group.
