Re: I\'m a Satoh. Mits dealer
John, seemed like my pumps, when they went out, sounded different. In fact, as I recall, the first time, the spline (or was it a key) stripped off of the input shaft, so there was no noise, since the pump wasn't even turning. That was really tough to determine since the block that couples the pump to the slightly flexible coupling on the crankshaft end, was still turning anyway. Really thought that whole pump and coupling setup was one of the only poorly designed features of the Satoh. It was a great economical tractor otherwise. Good luck to you.