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 - Women and Tractors - Tractor Engine Repair - by Teri Burkholder. One of the great things about working on a tractor engine with your other half is that you know what he is thinking of at all times and can anticipate his every move and his next thought of what he will do. With Ben, anyway, I can tell! He'll be busy working and I’m handing him tools and he says, "give me that..." and I’ve already got it in his hand or "hand me that....."and I’ve got the portable light right where he needed it placed to see. "Run in the house and get me a...."as I open th
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