Oregon 30-430 Lawn Mower Air Filters Oregon 30-430 Replacement Onan Air Filter 8-1/4" OD, 6-3/8" ID, 2-1/4" Height Fits models NHC, T260, P218. Use on John Deere 318 & 420 tractors Use Oregon 30-953 Pre-cleaner Replaces Onan 140-1228, 140-2522, 140-2628, Grasshopper 100941, John Deere AM106953, HE140-2522, HE140-2628, Toro NN10774