The Ferguson-Brown Company was a British agricultural machinery manufacturing company formed by Harry Ferguson in partnership with David Brown. Ferguson-Brown produced the Model A Ferguson-Brown tractor incorporating a Ferguson-designed hydraulic three-point linkage hitch. Of the 1,356 produced 400 of the tractors were sold in Scandinavia. The early tractors were fitted with the Coventry Climax model E engine which was a descendant of the American Hercules engine as fitted to the prototype "Black tractor" later the engine manufacture was taken on by David Brown Ltd. who made a number of improvements such as a deeper sump, some of the earlier tractors suffered from oil starvation on hillside work. It has been narrowed down by surviving examples that the engine change from the Coventry Climax to the David Brown took place around tractors serial numbers 525 to 528. Harry Ferguson surmised that the tractor hitch was the key to having a better plough and designed a simpler tractor attachment for it. Agreement with Ford In 1938 Ferguson made a handshake agreement with Henry Ford to produce Ferguson System Ford-Ferguson tractors using Ferguson's own self-regulating three-point hitch system, beginning with the Ford-Ferguson 9N tractor. This tractor is recognizable by the blue Ford emblem on the front of the hood and the Ferguson System emblem on the grill. The three-point hitch soon became the favourite hitch attachment system among farmers in North America and around the world. This tractor model also included a rear Power Take Off (PTO) shaft that could be used to power three-point hitch mounted implements such as sickle-bar mowers. This PTO location set the standard for future tractor developments. Agreement with Standard In December 1945 Standard Motor Company Limited announced that an arrangement had been made to manufacture Ferguson's tractors. Standard's newly acquired factory at Banner Lane in Coventry would be used for the project. These tractors would be for the Eastern hemisphere, with Ferguson tractors built by Ford in America for the Western hemisphere. Production was expected to start in 1946. Following conversion of the former WW2 aircraft factory. Implements would be sourced and sold separately by Ferguson. Split with Ford In 1946 the Ford Motor Company parted from Ferguson, following several disagreements and a protracted lawsuit followed, involving Ford's continued use of Ferguson's patents. Ford altered the hydraulic design of its postwar tractors to avoid Ferguson's hydraulic system patent, but continued to produce machines equipped with the basic