Here is the English translation of the text:

The John Deere 20-series models had about 20% more power than the corresponding earlier models. Thus, there was room below the 420 for a smaller model, the 320. It had the engine from model 40 and the transmission previously used in model M. The first 20-series model to be introduced was the 420 at the end of 1955. The earliest 420 tractors were painted entirely green, with no yellow stripes. These appeared only in the summer of 1956, when the larger models made in Waterloo were moved to the 20-series. The steering shaft was no longer on top of the hood, but the steering wheel remained vertical until autumn 1957. The 420 was available in seven versions, with the utility version growing in popularity. The 320 was available in just two versions, both equipped with a wide front axle. The engine in the 420 was bored slightly larger than before, and it now had a water pump and thermostat in the cooling system. Alongside the 4-speed transmission, a 5-speed gearbox was available, which had one more gear for fieldwork. These smallest models still had a 6-volt electrical system.

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