How often should the hydraulic oil of a small excavator be changed?

[DIG-DOG]

1. Working environment

High temperature environment: In hot areas or under high temperature conditions for a long time, the hydraulic oil temperature is continuously high. This will accelerate the oxidation of hydraulic oil, reduce its viscosity, deteriorate its performance, and make the additives lose their effectiveness faster. For example, in open-pit mines in summer, the ambient temperature exceeds 40°C, and the hydraulic oil is easy to deteriorate and may need to be replaced every 500 hours.

Dusty environment: There is a lot of dust on the construction site, and dust can easily invade the hydraulic system. Once mixed with hydraulic oil, it will aggravate the wear of internal components and block the filter and oil circuit. Like urban demolition sites, dust is flying, and the risk of hydraulic oil contamination is high, and it may need to be replaced every 500-700 hours.

Humid environment: In high humidity or underwater working scenes, moisture can easily enter the hydraulic oil. This will cause the hydraulic oil to emulsify, reduce lubrication performance, and corrode metal parts. For example, in swamp construction, the hydraulic oil is greatly affected by moisture, and the replacement cycle should be shortened to 500-700 hours.

Replacement filter element for small excavator

2. Working intensity

High-intensity operation: If the small excavator operates continuously for a long time and at a high load, the hydraulic system will frequently be subjected to high-pressure shocks. For example, in water conservancy projects, when excavating earth continuously, the hydraulic oil will decline rapidly under such harsh working conditions. To ensure the stable operation of the system, it may need to be replaced every 500-700 hours.

Frequent start and stop: Frequent start and stop of the excavator will cause large pressure fluctuations in the hydraulic system and drastic changes in oil temperature, which will accelerate the aging of the hydraulic oil. For example, when frequent loading and unloading operations are carried out in a narrow space, the replacement cycle of the hydraulic oil should also be biased towards 500-700 hours.

Replacement filter element for small excavator

3. Hydraulic oil quality

High-quality hydraulic oil: High-quality hydraulic oil additives are well formulated and have strong anti-oxidation, anti-wear and anti-pollution capabilities. Using this type of hydraulic oil, under normal working conditions, the replacement cycle can be extended to 800-1000 hours.

Ordinary hydraulic oil: Hydraulic oil of average quality with slightly poor performance stability. Under the same working conditions, it deteriorates relatively quickly and the replacement period may be 500 - 800 hours.

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