The David Brown 900 was built for two years, but suffered teething problems (fuel pump and steering), but did have some new features. These features were added over the subsequent tractors, the David Brown 950 (1958-61), 950 Implematic and 990. The power take off shaft (PTO) and hydraulics were live, meaning that they would work even thought the tractor was stationary. The hydraulics had variable depth control, draft control, which was far better than merely up or down. The PTO was now two speed. A differential lock (diff lock) was added to the back wheels, aiding grip. This tractor produces a maximum 42.5bhp, 40hp at the PTO, and 36 hp at the drawbar with a top speed on nearly 12mph.
Ref: Farm Classics, Volume One. David Brown Tractors 1936-1964 by Alan Earnshaw
This is a David Brown 950 Implematic, built in about 1960. A classic little tractor, ideal for road runs, with a great top speed and plenty of grunt. It can still be used for work, and I would love to see how it copes with a three furrow Ransome plough that we have. I know that there wouldn't be a problem with the two furrow David Brown plough that we have. There is no V5 registration document with this 950 Implematic, but we are looking into getting it on the road.