Most farmall 300 tractors have a 2-1/2 inch diameter rear axle. Small percent of 300 tractors have whats called a heavy axle or 2-3/4 inch diameter axle. Thats the same size as a M axle and the cast centers will work on both axles. Depending on the type wheel installed if the bolt heads are cut on the axle clamp or clamps they will loosen on the axle but won't come out of the wheel. So then bolts have to be cut off agian after the wheel is removed from the axle to get the clamps out. Then there's the job of getting the cut bolts out of the clamps if reuseing. If the 300 has 8 spoke cast wheels the clamps will be different from a 6 spoke used on a M. Unless the 6 spoke wheel is a later replacement from IH then the 6 and 8 spoke wheels for a 2-3/4 inch axle use the same axle clamps. Thats not common though. You may already know the 6 and 8 spoke wheels use a different rim. Also if you mean the rim clamps, if the 6 spoke wheel is turned right on the axle just the nuts and clamps on one side need removed. On the 8 spoke wheel one nut and bolt per clamp.
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Today's Featured Article - Harvestin Corn in Southern Wisconsin: The Early Years - by Pat Browning. In this area of Wisconsin, most crops are raised to support livestock production or dairy herds in various forms. Corn products were harvested for grain, and for ensilage (we always just called it 'silage'). Silo Filling Time On dairy farms back in the 30's and into the first half of the 40's, making of corn silage was done with horses pulling a corn binder producing tied bundles of fresh, sweet-smelling corn plants, nice green leaves with ear; the
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