Kris, Mine is 1982. I had lots of issues when I first got mine, that's what you get for $150.(search 680 project, go back a few pages). I found the hydro issue was from the fluid muck clogging the pickup tube also the gasket between the pump halfs is bad. I found a complete rear from a 682 to swap out. The electrical problem is the PTO sw. the melted connector was rust buildup on the key sw. I have many things planned for this tractor, almost done collecting pieces/parts. Hope to start fabricating soon.
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Clay
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