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Larry, as near as I can tell from your post you are looking for a clutch plate and a pressure plate, is that right? The shaft that drives off the engine clutch plate is called a "clutch shaft" and sometimes a "engine pto shaft". It is splined at the clutch plate and on the other end (transmission end) just aft of the clutch shaft bearing at the hand clutch pack on your tractor. It appears the vendor is trying to ID the clutch shaft so they can provide a 9-1/4" clutch plate with a spline count & diameter that matches your clutch shaft. The clutch shaft for the 300B series is p/n G10365 before s/n 6097696 and p/n G17201 s/n 6097696 and after. I think the 9-1/4" single clutch plate (standard p/n G11077 or heavy duty p/n G11079)is the same for both but if the vendor can't figure it out from the shaft p/n's go somewhere else. The least expensive repair is to reline if your existing plate is in decent shape. The pressure plate is a different animal, it is splined to accommodate the hydraulic pump drive shaft. I wouldn’t try to do any generic matchup there. Joe
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