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Alternatively, the term "power tiller" or "rotary tiller" as is understood in Asia and elsewhere is the rubber- or iron-wheeled, self-propelled machines of 5–18 hp (3.7–13.4 kW) usually powered by heavy-duty single-cylinder diesel engines (and many Asian countries historically have had to pay a high luxury tax on petrol/gasoline).
Prior to 1964, tires were all made to a 90% aspect ratio. Tire size was specified as the tire width in inches and the diameter in inches – for example, 6.50-15. [24] From 1965 to the early 1970s, tires were made to an 80% aspect ratio. Tire size was again specified by width in inches and diameter in inches.
F210 Honda tiller 1949 Farmall C with C-254-A two-row cultivator A tractor-mounted tiller Tines close-up A cultivator pulled by a tractor in Canada in 1943. A cultivator (also known as a rotavator) is a piece of agricultural equipment used for secondary tillage.
Modern road tires have several measurements associated with their size as specified by tire codes like 225/70R14. The first number in the code (e.g., "225") represents the nominal tire width in millimeters. This is followed by the aspect ratio (e.g.,"70"), which is the height of the sidewall expressed as a percentage of the nominal tire width.
Heavy-duty tire changers can work with some wheels up to 56 inches (1.4 m) in diameter and tires up to 90.5 inches (2.30 m) in diameter and 43 inches (1.1 m) wide. [5] Heavy-duty tire changers are used for agricultural, off-road and construction vehicles.
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.
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The Ford N-series tractors were a line of farm tractors produced by the Ford Motor Company between 1939 and 1952, spanning the 9N, 2N, and 8N models. [1]The 9N was the first American-made production-model tractor to incorporate Harry Ferguson's three-point hitch system, a design still used on most modern tractors today.