XCMG XP203 Diesel Filter Assembly.The flter element removes a small amount of solid particles in the liquid or air, which can protect the normal operation of the equipment or the cleanliness of the air. When the fluid enters the filter element with a certain filter screen, its impurities are blocked, and the clean fluid flows out through the filter element.BFU 700X filter.XCMG XP203 Diesel Filter Assembly.XCMG XS142J Diesel Filter.