AIR FILTER ASSEMBLY

The 8N Tractor air filter assembly needs to be thoroughly clean. Not just the oil cup, but the entire housing. Some people will try to tell you that the filter housing is "self-cleaning" and the dirt just falls back into the oil cup. But that is not what the Ford manual says. You don't have to do it every time, but the only way to thoroughly clean the air filter assembly, is to remove the oil cup. Above the oil cup is a retainer. Remove that and then there chould be a coiled metal filter screen up inside the filter body. You might need to make a tool (a bent piece of wire from a coat hanger works good) to reach up inside the housing and pull out the wire screen material. Thoroughly clean the inside of the filter housing and either clean or replace the metal filter screen. I simply unroll mine and clean it with air pressure.

For really nasty ones, or if you are planning to repaint it, you might find it easier to completly remove the air cleaner assembly from the tractor.

Once the filter body and screen are completly clean, reinstall the scrreen, the retainer, and fill the oil cup to the marked level with new motor oil. Use the same grade of motor oil that you are using in the engine.