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The new Model 721/722 was introduced in 1948. Deluxe versions became available in 1955. The Model 725 variant was later introduced in 1958. These models all share a common design differing only by features and may be collectively referred to within this article as the Model 721 unless otherwise noted. Model 721 production ended in 1961 with the ...
In engineering terms, three-point attachment is the simplest and the only statically determinate way of rigidly joining two bodies. A three-point hitch attaches the implement to the tractor so that the orientation of the implement is fixed with respect to the tractor and the arm position of the hitch.
In 1916 he incorporated and, after obtaining partners, began producing single-wheel tractors and attachments under the name Gravely Tractor. The Model "D" Gravely Power Plow, like the prototype, was a single-wheeled affair, with a 2 horsepower (1.5 kW) air-cooled engine. It wasn't until 1937 that Gravely would introduce the Model L two-wheeled ...
For 1941 the MD model was introduced as the first row crop diesel-powered tractor; over a decade later, IH's largest competitor, John Deere, introduced a diesel option on their row crop models. The letter series tractors were updated to the "super" series in 1953 (with the exception of the A, which had become a "super" in 1947, and the B and BN ...
A PTO at the rear end of a farm tractor A PTO (in the box at the bottom) in the center of the three-point hitch of a tractor. A power take-off or power takeoff (PTO) is one of several methods for taking power from a power source, such as a running engine, and transmitting it to an application such as an attached implement or separate machine.
1936 Case Model CC Tractor Preferred share of the J. I. Case Threshing Machine Company, issued 29. August 1911 A Case row-crop model, circa 1940s Case Model 830 Case Model 2090. The Case Corporation was a manufacturer of agricultural machinery and construction equipment.
Richard Hornsby & Sons grew into a major manufacturer of agricultural machinery at their Spittle Gate Works. [citation needed] The firm went on to produce steam engines used to drive threshing machines, and other equipment such as traction engines: their portable steam engine was one of their most important products and the market leader.
When mass production of buggy parts began in the early 19th century, fifth wheels were among the first products to be made. There were a number of patents awarded for fifth-wheel design. Edward and Charles Everett, Quincy, Illinois patented a type of fifth wheel in 1850, followed by Gutches' metallic head block and fifth wheel in 1870 and ...