I have a couple John Deere's around that size, so I feel your pain. First thought is what in the hell are you doing with all that iron out in a cornfield? Is there a Wal mart on one side of that photo we missed? Digging missile silo's? Running an oil pipe line to Canada?
If you were the operator,never mind this comment, but the guy running the machine probably tracked and pushed and poked around a bit much, busted the crust, and then came liqufaction, so to speak, where all is lost. Whenever I get to the idlers I shut it down and take a few days off for things to dry off and plan an escape.
Great photos that might save a guy some pain in the future. You should post on the excavation forum which is like this one.
Better check your turntable grease housing for muck inside.