1. When we maintenance the air filter, the paper filter can not be cleaned in the oil. Otherwise it’s will inefficient and cause the accident happening. If the filter element is blocked by the dry ash, we should use the compressed air gently from the top to bottome blowing clean.

2. If the filter is blocked by fumes or soot, it should be used in the detergent and filter the filter, and then scrub with water.
3. As the price of the air filter element is cheap,  such as fouling serious, we can be replaced it directly.  In general, when the filter paper filter for the fourth maintenance, it should be replaced to a new one.