If you have no other way to move it, you can use come-alongs on the tops of the tracks to "winch" the tracks backwards so you can move it into the shed. Just this past weekend, my buddy and I went to pick up a D2 he bought. The seller's brother was helping to load it and when he was about to push on the radiator with his blade, I stopped him and he threw the funniest tantrum and refused to continue loading. So, we loaded that D2 onto my gooseneck using nothing but two twitches, one link at a time. Took two hours to load it but saved over four hours of a round trip. Going back next week but this time with a winch : ) Anyhoo, just an option if you don't have a better one. But for sure, the sequence I'd follow is:
- check why the pony won't start - fuel and spark?
- tow start with another machine or push it in with another machine. Typically you need a machine at least as big but it all depends on what you're rolling on. If you were on asphalt, you could pull it with a pickup. If you're on soft plowed ground, you'd need a D7 or D8 likely. If you need to turn it, it a helper to pull the steering clutches or typing them back will make turns easier
- winch or comealong, preferably to an anchor but if none available, winch the top of the track to the blade mounts or similar

Let us know how you get on

The good news is the pony is a very simple engine and will tolerate quite a lot of degradation in compression and wear. It's the mag and carb that are the go-no/go parts mainly. But it's also fairly straightforward to refurbish them back to good condition. I'm looking forward to seeing how you get on