I think the first set of wheels are from a John Deere Dump Rake. The cogs on the inside of the hub cause the tines of the rake to lift up and the hay to dump. You manually pull a lever (with some force) that engages another gear on a shaft on the tines that engages the wheel cogs. More or less that is the idea.
I used such a rake thirty years ago to rake about 34 acres, then the neighbour baled about 300 bales (square bales - about 60 lb + or - each) from the 34 acres.
Alex IV On The John Deere Dump Hay Rake, Alex V Driving "Tillie-The-Tractor" - Thirty Years Ago - Yikes! Thirty Years Ago! [How can that be? I thought I (Alex IV) was only 35 years old this year, and last year, ... ?]
btw If it is a John Deere, the spokes would have been yellow, and maybe the inside of the wheels green - not sure.
btw 2 We bought this dump rake for $15 CDN (equal to $11.62 USD at todays CDN/USD currency exchange rates) from a neighbour at Moberly Lake, BC, Canada in 1973. We hauled it to Vancouver, and then sold it to a very happy person for $115 CDN ($89 USD), in about 1984, when we moved.
Enjoy,
Alex