Does it run? How good are the tracks including sprockets? Remember parts for the larger older Hercules diesels are not real plentifull. What do you intend to do with it? How good are your welding skills and your diesel skills on antique diesels.  I have some Heil literature if interested. I would make you a copy. Landis wanted to sell a friend of mine a blade for an OC 12 for 1000. Nothing with it. John