Contrary to popular belief, none of the air passes through the pool of oil in the bottom of the air cleaner. This concept is often misunderstood(me included when I was younger). Incoming air comes down the inner tube of the air cleaner and then makes a 180 degree turn upward through the wire mesh of the outer large tube of the air cleaner and thence to the carburetor. Larger and heavier dirt particles coming down the inner pipe with the air are too heavy to make the 180 degree turn and go straight down where they are trapped in the oil at the bottom. Lighter particles do make the turn but the suction and turbulence of the air changing direction pulls up an oily mist from the pool of oil which adheres to the mesh screen where they are trapped. As the oily mist gets heavier it turns into droplets which drips back to the pool in the bottom taking the lighter particles with them. Most of my students had a misconception of the process.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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