Wool or no wool for a Farmall B Air cleaner?

J Huff · Nov 7, 2009

Hello again,

I found 2 inches of water in the oil bowl of a Farmall B's Air Cleaner, there was a thick sludge there too and am not sure if it was rust deposits from somewhere else or from metal"wool" packing.

I also noticed that this website sells wool for B's stating that "some air cleaners use it". How do I tell if mine is one that uses it?

Thanks in advance.

ScottyHOMeY · Nov 7, 2009

About the only place for any rust in the oil cup to have come from is from the walls of the air cleaner, the intake pipe down the center, or from the "wool." The latter two are more likely.

If yours is the typical Donaldson air cleaner, resembling a muffler with a cup at the bottom and a narrow intake at the top, it will use the "wool," which would remind you of one of those copper- or steel-colored kitchen pot scratchers, though not as tightly woven or packed.

I hadn't seen the stuff offered, and I expect it would be quite a tedious job picking out the old and getting the new in densely enough to do its job. I've got my doubts, but if it works, great. As long as the existing "wool" isn't crumbling or flaking apart and you have adequate oil in the cup to be drawn into it by the engine vacuum, slightly rusted/pitted wool might actually be marginally more effective than clean and new, by virtue of having an increased surface area to hold oil and trap dust.

rustyfarmall · Nov 7, 2009

Wool? In a Donaldson air cleaner? I've never seen anything in them but multiple layers of screen wire.

gene bender · Nov 7, 2009

Nothing in the oil cup but oil. Hard to tell what someone put in there. Just clean and refill with same oil you use in the crank case just fill to the level markes on the cup.

Wool or no wool for a Farmall B Air cleaner?

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