Replacement method
preparation:
Turn off the engine and ensure that all operations are carried out in a safe and stress free environment. If the device has just finished working, it is necessary to wait for a period of time for the system to cool down to avoid burns.
Prepare a new hydraulic oil filter and any necessary tools such as a wrench.
Release stress:
If it is an excavator or other equipment, due to residual pressure after operation, the pressure should be relieved before changing the oil to ensure that there is no oil spray during oil change.
Find the position of the filter element:
Hydraulic oil filters are usually located at the inlet or outlet of the hydraulic oil tank, and may also be installed at the pump inlet, outlet, and other positions. The specific location may vary depending on the device, please refer to the device's user manual.
Disassemble the old filter element:
If it is a vertical filter element, simply loosen the fixing bolts and remove the old filter element.
If it is another type of filter element, such as a return oil filter element, it may need to be disassembled according to specific steps, such as first releasing the pressure in the hydraulic oil tank, holding down the exhaust valve until no gas is discharged, and then opening the upper cover of the hydraulic oil tank to remove the filter element.
Install a new filter element:
Place the new filter element into the filter holder, ensuring proper installation, tight connection, and good sealing.
For filter cartridges with special requirements, such as those with sensors, ensure that the sensor is connected properly.
Check and start:
After installation, check if the filter element is securely installed and if there are any leaks or other issues. Then restart the equipment and check if the hydraulic system is working properly.
Cleaning method
Kerosene immersion cleaning method:
If the material of the hydraulic oil filter is metal mesh or copper mesh, it can be soaked in kerosene for a period of time to soften and dissolve the stains.
After soaking, use a hair dryer to wash and blow clean the clogged stains inside. But pay attention to the temperature and distance of the hair dryer to avoid damaging the filter element.
Ultrasonic cleaning method:
Ultrasonic cleaning machines can be used to clean hydraulic oil filters. Place the filter element into the cleaning tank of the ultrasonic cleaning machine and add an appropriate amount of specialized cleaning solution.
Set the parameters such as cleaning time and temperature, and start the cleaning machine. The vibration effect of ultrasound can effectively remove dirt and impurities on the filter element.
After cleaning, rinse with clean water and then air dry or blow dry with compressed air.
It should be noted that not all types of hydraulic oil filters are suitable for continued use after cleaning. If the filter material is fiberglass or filter paper, cleaning may damage its structure, resulting in a decrease in filtration efficiency. In this case, it is recommended to replace the filter directly with a new one.
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