Three, generally equipped with air filter plastic box above the clamp fixed, just gently off the two metal clips, the entire air filter can be lifted on the cover. There will also be some models that use screws to fix the air filter. At this time, it is necessary to select the appropriate screwdriver to unscrew the screws on the air filter box. Then you can see the air filter inside and take out the air filter by hand.
　　4. After removing the air filter element, check whether there is more dust, gently pat the end face of the filter element, or use compressed air to clean the dust on the filter element from inside to outside, do not rinse with tap water. If the air filter is checked for blackening and blockage, a new filter should be replaced.