As there is no filter on the LF200, I really can't speak ingrish like the so-called manual, what is that manual ?! Anyhow, when you change the oil you remove the 24mm oil nut, as you remove it you'll see there is a spring and then under it is  a screen "thimble". This is what I believe the manual calls the gauze filter...When I drop the oil I take the screen and wash it out and dry it in a parts washer.