Experimentation is the answer. I run 4" twisted chisels on my 9 shank Unverferth. The two front ones are 30" apart. If you turn them towards the center, they can actually ball up a wad of tough residue in the right conditions. If you turn them out, they are throwing dirt right on the tires/rims. They will build a big cone of dirt right out on the wheel, then dump it right where you don't want it- like in the road or driveway. The two outboard rear ones are shown turned out. But I turn them in because I don't want to be throwing dirt off the edge of a field onto a lane, into a ditch, etc. But I still get ribbons of sod thown out here and there along grassy edges. To me the biggest issue is trash. The coulters behind the tractor tires are useless as all those tires do a better job of crushing and breaking up stalks, etc. than anything. So the machine ought to be made with all the chopping action concentrated in the middle. Good luck.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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