bc, the difference is the thickness of the mounting plate. The sn break is 13011 that used the 12 gal pump and 15 tooth pump gear, later used 17 gal pump and 21 tooth pump gear, this is with 540 pto tractors. I don't know the thickness of plate, but parts book shows 1 1/2 inch mounting bolts on older one and 1 7/8 on later. Only spacers I ever encountered were the different thickness mounting gaskets to adjust gear backlash. You do need a filter though as a lot of trash, like chips of gears and bearings from trans are always making their way through.
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Today's Featured Article - Harvestin Hay: The Early Years (Part 2) - by Pat Browning. The summer of 1950 was the start of a new era in farming for our family. I was thirteen, and Kathy (my oldest sister) was seven. At this age, I believed tractor farming was the only way, hot stuff -- and given a chance I probably would have used the tractor, Dad's first, a 1936 Model "A" John Deere, to go bring in the cows! And I think Dad was ready for some automation too. And so it was that we acquired a good, used J. I. Case, wire tie hay baler. In addition to a person to drive th
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