Thanks guys for the support and the diagrams! I found out that item number 7 is obsolete from Kubota, so I’ll just google some Japanese tractor salvage yards. A friend has had success with West Kentucky Tractor Parts, any other suggestions that cater to Kubotas? Maybe a Donaldson cyclone-type or paper-type element precleaner retrofit? I would rather stay away from oil-type elements because of the dust and maintenance. I bush hog our pasture regularly and the cyclone-type precleaner performs well. Is changing the oil in the oil bath air cleaner when I change the engine oil acceptable? I use the tractor about 80 hours a year, so I change the oil annually with Rotella 15W40. Thoughts? Thanks again!