Featured as the Cover of the 20th anniversary edition, the 2009 Classic Farm Tractors Calendar showcased Jon Kinzenbaw with some notable items from his collection.
In the 1970s, farm prices were booming, coupled with the trend to fewer farmers with larger acreages, the stage was set for bigger tractors with increased horsepower. Jon Kinzenbaw, an Iowa farm boy and mechanical genius, had established Kinze Manufacturing Company, repowering John Deere tractors with Detroit Diesel engines, such as the John Deere 4520 shown. Depending on inject used, it could be boosted to between 250 to 300 hp.
This tractor, equipped with a Detroit Diesel 8/V-71 engine, was repowered for Deere and underwent trials at its test farm near Coal Valley, Illinois—the kind of experimentation that led to today’s high-horsepower tractors.
The blue 30’ folding disk was hand-built by Kinzenbaw in 1970. The 4520 pulled it easily at 7 mph.
Note the original (18,000 miles) 1970 Chevrolet pickup with Craftsman toolbox. The white corn crib in the background is an original building on his farm. (scroll down for photo)
The world-famous Classic Farm Tractor Calendar from Classic Tractor Fever is in its 21st year of publication with the 2010 calendar available now. They have calendars, videos, books, and much, much, more. Click here to visit their online shop.