I recently purchased a 2600 and was told by the owner that the tractor had to be entirely shut down in order to engage the PTO because it grinds in if you don't. Yesterday was my first opportunity to put the PTO to use and I confirmed that it did indeed have to be shut down in order to engage it which means cranking it over with whatever the PTO load is. Also, the clutch doesn't disengage the PTO during any stage of clutch travel. Assuming that it came from the factory with a 2-stage clutch, my questions are: Are these two problems related? Does full repair require splitting the tractor? How much can I expect to shell out for this at a dealer's shop? I bought it "right" so I son't mind spending the money to get it running correctly. It's a 1978, SN C561300. Transmission 7M19B.