What are the hazards of using fake air filters in excavators?

Because the air filter has a simple manufacturing process and low production cost, it is extremely easy to be counterfeited. It is understood that currently, over 80% of the air filters in the market are counterfeit. The fake filter elements are either made of cheap and low-quality non-woven fabric or low-quality or even counterfeit activated carbon, with a cost of less than 10 yuan. This type of filter element not only fails to provide good protection for the machine, but also has the problem of shedding debris during use. These residues can directly enter the engine and cause damage to it.