Old D6 Question

Hello everyone, just found this forum and hoping you all could provide a heavy equipment novice with some advice. We have an old D6 at our farm that my grandfather purchased used in the 1980's. It was used on and off until the mid 2000's and has sat parked since 2006. It was running when he parked it but I seemed to recall that he was in the process of replacing the flywheel between the main engine and pony motor because it has some chipped teeth. Shortly after he tore into it he got...

Old D6 Question

Old D6 Question