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John Deere Model 60 (1955) John Deere Model 530 (1959) John Deere Model 430S (circa 1960) After years of testing, Deere & Company released its first proper diesel engined tractor in 1949, the Model R. The R was also the first John Deere tractor with a live independent power take-off (PTO) equipped with its own clutch. The R also incorporated ...
The Model D was John Deere's first mass-produced tractor, and was released to the public in 1923. It was a standard tread tractor with fixed wheel widths, as opposed to the adjustable wheels of a row-crop tractor. The D was initially equipped with a two-cylinder side-by-side 30-horsepower (22 kW) engine, of 465-cubic-inch (7,620 cc ...
The R-790 Whirlwind began as the Lawrance J-1, a nine-cylinder air-cooled radial developed in 1921 by the Lawrance Aero Engine Company for the U.S. Navy. The Navy was very enthusiastic about air-cooled engines, which it considered better suited for naval use than liquid-cooled ones. [1]
Wright's J-1 was the first engine in its nine-cylinder R-790 Whirlwind series and was quickly followed by the J-3, J-4, J-4A, J-4B, and finally the popular and successful J-5 of 1925. In 1928, Wright replaced the R-790 series with the J-6 Whirlwind family, in which a supercharger was added to boost engine power and the cylinders were enlarged ...
The piston stroke of 5.5 in (14.0 cm) was unchanged, but the cylinder bore was expanded to 5.0 in (12.7 cm) from the R-790's bore of 4.5 in (11.4 cm). While the R-790 was naturally aspirated , the R-760, like the other J-6 engines, had a gear-driven supercharger to boost its power output.
The John Deere Model R tractor was John Deere's first diesel tractor. A large, heavy tractor, it had fixed wheel widths and was not produced as a row-crop tractor with adjustable axles. The R was followed in the John Deere numbered model series by the John Deere 80, 820 and 830 tractors, which represented evolutionary upgrades to the basic R.
The John Deere Model B tractor was a two-plow row-crop tractor produced by John Deere from 1935 to 1952, with direct successors produced until 1960. The B was a scaled-down, less expensive version of the John Deere Model A. It was followed by the updated 50, 520 and 530 models.
The John Deere Model M tractor was a two-cylinder row-crop tractor produced by John Deere from 1947 to 1952, with successor models produced until 1960. It was succeeded by the updated 40, 420 and 430 models, as well as the 320 and 330 models that occupied the market positions left vacant by the more powerful 400 series models.