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An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
During the 1950s and 1960s, farmers often would have to purchase the same brand implements as their tractor to be able to hook up the implement correctly or to best effect. If a farmer needed to use a different brand of implement, an adaptation kit—which were typically clumsy, ill-fitting, or unsafe—was sometimes needed.
Most major tractor implement manufacturers make box blades, including Cammond, Woods, Gannon, & BushHog. Commercial laser guided models are coming into use which automatically level the blade via reference to an external laser. Three point road graders can be viewed as a specific type of box blade, and are used to grade and maintain dirt and ...
An orchard version, the BO, and an industrial tractor version, the BI, were also produced. The BR and BO ended production in 1947, with the BI ending production in 1941. Meanwhile the John Deere AR and AO continued until 1952. For compatibility with Model A cultivation accessories, the frame was extended in 1937, referred to as "long-frame" Bs.
Some tractor operators have raised concerns about using ROPS in low-clearance environments, such as in orchards and buildings. In response, NIOSH developed an Automatically Deploying Rollover Protective Structure (AutoROPS) which stays in a lowered position until a rollover condition is determined, at which time it deploys to a fully extended and locked position.
A Thornycroft steam tractor with articulated trailer competed in the 1898 heavy vehicle trials in Liverpool which took place from May 24 to May 28. [1] Built by the Steam Carriage and Wagon Company of Chiswick, the trailer and tractor unit were connected by a turntable though the details of the coupling are not revealed apart from a schematic.