This article is in response to confusion often arising over the fitting of these dry liners. All early David Brown engines, until the introduction of the three cylinder engines in 1965 were fitted with wet liners. This includes the 4/47 engine as used in the 990 Implematic, which carried over into the 990 Selectamatic until 1968. Two versions of the three-cylinder engine were introduced in 1965, both using dry liners with a bore of 3 13/16 inches (3.8125 inches; 96.83 mm). The AD3/30, fitted...

Note – this article is only relevant to tractors supplied within the U.K. although some cabs mentioned may have been fitted to exports. Broadly speaking, tractor cabs fall into three categories; Weather cabs just protected the driver from the elements to a varying degree. Many were simply a light metal frame supporting canvas, the only glass being in the doors and the windscreen. Others were of metal and/or fibreglass construction. Safety cabs became a legal requirement on new tractors in...

1966 is generally recognised in the UK as the beginning of white David Browns, as this is when they began to appear on British farms. However, the evolution of this is rather more complicated than it initially appears! As we will see, it wasn’t precisely aligned with the introduction of the Selectamatic hydraulic system. Canada was a good market for David Brown in the 1950’s, but they had yet to reach over the border into the USA, except in a small way during the early 1960’s. As the size of...