Big Four Tractor Restorations: A Global Endeavor

Minnesota machinist plays role in restoration of 11 Big Four tractors.

When Al Severson needed to make the steering chain spring assembly for the Big Four, it required a lot of searching to find the correct spring to match the original. “I was able to obtain it from John Deere,” he says. “I told John Deere that at one time they marketed the Big Four, so they should have parts in stock.”
Photo courtesy Harriet Severson