Jim - I pulled a 12 ft 4 inch Kewanee disk with 20 inch rippled blades all over our farms, up steep hills and down. Always 3rd gear in plowed ground with duals for traction and flotation, on old corn ground disking before plowing I could run in 4th gear in the level fields and third on hilly ground.
I have absolutely no idea how much weight I would had to have added to make that disk pull hard enough to drop into 2nd gear. 500#? 1000#? 2000#? More weight than the disk was built to carry for sure! Not sure there would be room on an 8 ft disk for enough weight to need to drop into 2nd gear. There are heavy offset disks made for primary tillage. They weigh 2-3 times what a typical tandem pull type disk weighs, and I could see an 8 ft disk of that type being all a good 450 could handle in 2nd.
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Today's Featured Article - The Mud Daubers and the Old John Deere - by Jon Zehnder. I have a 1941, John Deere Model A tractor I have owned for about a year and a half. This is my first (in case my wife reads this, "FIRST") tractor and it has been a learning experience. After considerable advise and assistance from local tractor nuts and the forums of Yesterday�s Tractors, I had finally got it running pretty well. I have tuned it up, overhauled the carburetor, installed a borrowed, rebuilt magneto, installed a new Power-Trol, patched the radiator, installed new front wheels a
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