1. Drain the old oil: Unscrew the drain nut at the bottom of the hydraulic oil tank, collect the old oil in a container, and ensure it is completely drained. You can start the engine and let it idle, turning the steering wheel left and right to help drain any remaining oil.
2. Clean the tank: Thoroughly clean the inside of the tank with diesel fuel or a special cleaning agent, especially in corners and crevices. You can use dough to absorb any remaining impurities to ensure the tank is clean.
3. Replace the filter: Unscrew the filter bottle counterclockwise, remove the old filter, and check for impurities. When installing the new filter, ensure a tight seal to prevent leaks.
4. Add new oil: Slowly add new oil to three-quarters of the tank using an oil filter machine, avoiding overfilling. Use the hydraulic oil specified for the equipment (e.g., 32 for winter, 46 for summer).
5. Bleed and test: Start the engine and let it idle, moving all hydraulic components (such as the boom and stick) to bleed air from the lines. Check for oil leaks at the connections and observe whether the oil level is stable.
Key Precautions
Oil Selection: Never mix different brands or models of hydraulic oil. Select the appropriate type based on the season and equipment requirements (e.g., No. 32 is suitable for low-temperature environments, No. 46 is suitable for high-temperature heavy-duty environments).
Safe Operation: Hydraulic oil is corrosive; if it comes into contact with skin, rinse immediately. Ensure the equipment is completely stopped before changing the oil to avoid environmental contamination.
Recommended Change Frequency: Change the hydraulic oil every 500-1000 hours or annually. For complex equipment, it is recommended to change the oil in stages, component by component.
