few points:

1. The deflector plate of the air filter should be kept intact, and the tilt angle should be 30-45 degrees. The blade surface can not be painted to prevent oxidation of particles into the cylinder.
2. Air cleaner maintenance to clean up through the breathable mesh. On the dust collection cup, dust particles shall not exceed 1/3 height, otherwise it should be cleared in time.
3. Fine filter oil level should be consistent with the standard, too high lead to oil into the cylinder area of carbon, too low to reduce the role of the filter, so that wear faster.
4. Metal mesh filter used in the substitute, the hole diameter of the wire or only slightly smaller, can not be increased, otherwise it will reduce the filter effect.
5. The intake network may not have leakage phenomenon, filter cleaning should be carried out in the smoke dust place.