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 - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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