D2 3J Question about the tracks not turning

Are you sure the main clutch is working?

Are the brakes possibly locked on the drums?

I dragged one up on a trailer with seized brakes once, it took removing the adjustment covers and lots of liberal tapping on the bands to free them up!

As Dj says, could be seized/ rusted brakes or the tracks are just rusted solid , maybe pulling a little both ways would give a clue. They are easy enough to slide on a hard surface, especially if it is wet. v

If it's that the tracks are seized with rust, then set them in water (dig a ditch or make a basin that you can sit the track in) - yes, really. The water softens up the rust and works better than any technique other than dismantling. Since you can't get the whole track in the water, run a soaker hose across the top of the tracks so that you soak the tracks that are on the top. Leave it there for a few days, then try it by jerking the tractor to-and-fro. You're trying to initiate any movement and the to-and-fro will rapidly magnify it. Once the tracks are free, then pull it around for a couple of hours to really grind that rust out of there and then if you have to let it sit again, see if you can flush the rust sludge out of the links - might not work but could be worth a try.
If it's not the tracks, then make a note of this and move on : )

Try hooking a chain to the top rear of each chain and pull on the tracks.
Chuck C

+1 on Chuck's comment and agree with loosening the brake linkage and thumping the bands as you can.