I am going to pick up a MF-12 Hydro that I am buying from a local Massey dealer tomorrow the price is $75 its a starter/generator setup. All original aluminum dash and nose, good shape all together. I know a lot about the MF-10 gearshift setups but have no knowledge of the hydro transmissions and I am curious on what to look for in terms of problems if it has any? Either way I am buying this tractor which I can either run or use for parts. But If I do decide to eventually use this tractor and not for parts I want to know the ins and outs of the hydro transmission. Any comments would be great.