Allis Chalmers 170

The Allis Chalmers 170 was manufactured from 1968 to 1973, and about 9,300 were released. The AC 170 was produced in order to replace the D17, however a few components were transferred to the new 170, including the Power Director, transmission, and Traction Booster.

The 170 came in two fuel-types: diesel and gasoline. The diesel model engine came from English manufacturer Perkins. It was liquid-cooled, had four cylinders, a bore and stroke of 3.875×5 inches, displacement of 236ci, and a compression ratio or 16:1. The Allis Chalmers gasoline model was also four-cylinders, but the outputs were quite different. The gasoline engine had a bore and stroke of 4×4.50 inches, displacement of 226ci, and a compression ratio of 8:1. When the engines were tested, the diesel model had a PTO power of 54.04 horsepower and a maximum drawbar power of 47.39 horsepower. The gasoline engine, however, had a PTO power of 54.12 horsepower and a maximum drawbar power of 46.93 horsepower.
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Allis Chalmers D10

Allis Chalmers introduced their Model D10 farming/agriculture tractor in 1959. The D10 was produced for eight years, with a total of about 9,100 being manufactured. The D10 was a two-wheel drive tractor with a four-speed sliding gear transmission. At the D10’s start, it produced about 24HP. After three series updates, however, the horsepower had been increased to 31HP.
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Allis Chalmers G

Allis-Chalmers had more than just the many-acre farmer in mind when coming up with tractors to produce and market. In 1948, they released the “G” model, which was a very small tractor designed for small farms and large gardens. Weighing in at only 1,285 pounds, the two-wheel drive G had a rear-mounted four-cylinder Continental N62 engine. It tested at a max belt power of just 10.33hp and a max drawbar power of 9.04hp.

Because the G was designed with the small farming jobs in mind, it had an appropriate line of implements available for the farmers’ use. These implements included cultivators, planters, and plows, as well as a front-mounted windrower and hay rake that were produced beginning in the early 1950s. Because of the engine being rear-mounted, the implements were easily viewed by the operator as they were working.
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Allis Chalmers D21

Allis Chalmers released its first D21 tractor in 1963, and it sold for about $12,300. For the first two years, a regular, six cylinder diesel engine ran this machine. This model was referred to as the Series I. Starting in 1965, a six-cylinder turbo-charged diesel engine was used, and it was called the Series II. A major difference in the two engines was the horsepower output. In 1963, the Series I D21 had a max PTO power measure of 103.1 horsepower, and a max drawbar power of 93.1 hp. Once the turbo-charger was installed, the PTO horsepower jumped up to 127.8 hp, and the drawbar power topped out at 116.4.

The transmission used on the D21 was an eight-geared sliding gear tranny. It had eight forward speeds and two in reverse. It was controlled by a range control knob and gear shift lever. The range control knob was near the steering wheel, allowing the farmer to have the tractor in either high or low range. The gear shifter then was used to select the desired gear. All of this had to be done while the tractor was stopped. With 18.4×34 rear tires, the D21 could move anywhere from 1.6mph to 16.2mph.
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