The 50-series large tractors introduced at the end of 1982 were manufactured only in the USA, unlike their predecessors. All models had a turbocharged 7.6-liter engine, and the power had been increased again. The number of Power Shift transmission steps was increased to 15. The lifting capacities were significantly higher than before. The weight of the tractors was also considerably higher than earlier models. The cab noise was reduced to 76-80 decibels. The four-wheel drive was mechanical, and the driveshaft was now positioned in the center. In some European countries, starting from 1986, instead of the 4250 model, a 140-horsepower 4350 was sold, which was equipped with a traditional gearbox and had slightly reduced other features as well.

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