Deutz Raupe
1 model in this series
Deutz DK 90: air-cooled six-cylinder crawler tractor with 7,984 cm³ displacement, 90 hp (66 kW), 8,950 kg weight and 11.3 km/h top speed
Deutz of Cologne built crawler tractors alongside wheeled ones for tasks where wheeled vehicles reach their limits on soft or uneven ground. The DK 90 belongs to this class of tracked tractors, used for heavy drawbar work in forestry, construction and agriculture.
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The six-cylinder diesel engine with 7,984 cm³ displacement is air-cooled and produces 90 hp, or 66 kW, at 1,650 rpm. At 8,950 kg weight, 2,130 mm width and 2,462 mm height, the DK 90 ranks among the heavy crawler tractors of its time; the top speed of 11.3 km/h shows the machine was designed for pulling power rather than travel speed.
At 11.3 km/h, the DK 90 sits well below the 40 km/h limit of driving licence category L. The tracked undercarriage spreads the high weight over a large ground-contact area, allowing drawbar work on ground where a wheeled tractor of equal output would sink in. The air-cooled six-cylinder engine needs no cooling water and stays robust even under sustained load on construction sites or in forestry work.
When buying a crawler tractor this old, check the condition of the tracks, track rollers, and drive and idler wheels, whose wear strongly affects performance. Also check the six-cylinder engine's cooling fins, the injection pump and the tightness of the final drives, since renewing a complete track undercarriage is costly and labour-intensive.
Sources: SpecCodex-Register: Kennwerte des Modells Deutz DK 90, Deutz (manufacturer)
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