Air filters 6001821320, 600-182-1320, 6001819480, and 600-181-9480 are used in bulldozers D21A and D21P.

Air filters 6001821320, 600-182-1320, 6001819480, and 600-181-9480 are used in bulldozers D21A and D21P.

Excavator air filters are a key component of the engine intake system, primarily used to filter dust, sand, and other impurities from the air entering the engine, protecting internal engine parts from wear.

Impact on impurities: Prevents particulate matter from entering the cylinder, avoiding "cylinder scoring" damage between the piston and cylinder;

Improved combustion efficiency: Ensures thorough mixing of clean air and fuel, improving power response and reducing fuel consumption;

Extended engine life: Reduces abnormal wear of internal components; cylinder wear in engines without filters can be up to 7 times faster.

Main types:

 Filter type: Blocks impurities through filter paper or metal mesh; most widely used; Oil bath type: Uses airflow to separate impurities from engine oil; common in diesel engines; Inertial type: Separates denser particles through centrifugal force.