When the excavator is weak, the handle sinks, and the construction efficiency is low. Generally, if the pressure is abnormal, replace the hydraulic oil return filter element, clean or replace the pilot filter element and oil suction filter element. The oil absorption filter element is mainly used to filter out the impurities in the hydraulic oil. Because of the long service time, there will be impurities and metal chips in the hydraulic oil pipe or oil tank. This article will summarize the cleaning or replacement process of oil absorption filter element. As each brand has different requirements for this, it is only for reference.
1. How long should it be replaced
Generally, unless it is an old excavator, the oil suction filter element does not need to be replaced frequently. Unless it can be observed that large wear damage has occurred on the surface of the oil absorption filter element. Otherwise, clean it thoroughly with clean oil and continue to use it.
2. Cleaning or replacement process
1) Park the excavator on a hard and flat ground in the hydraulic oil level check position.
2) Before cleaning the oil suction filter element, make sure that the engine is turned off and the safety lock is down. Try not to operate in dusty weather, otherwise impurities will enter.
3) Clean the circumference of the fuel tank cover to prevent foreign matters from falling into the fuel tank. Remove the air vent cap and press and hold the hydraulic tank vent valve 5-7 times to release the pressure in the hydraulic oil.
4) Remove the bolts and cover on the oil tank and take out the oil suction filter element.
5) Clean the oil absorption filter element with clean diesel oil or detergent. Check the filter element after it is completely dried. If the surface has great damage, it should be replaced with a new one.
6) Check the two O-rings at the bottom of the oil suction filter element. If it is worn, please replace it.
7) Install the oil absorption filter element in sequence, and then install the guard plate.
8) Start the engine and run it at low speed for 5-7 minutes. Retract and rotate each oil cylinder. Then return to the standard posture of checking the hydraulic oil. Shut down the engine and check the hydraulic oil volume. If it is insufficient, it should be supplemented.
