Deutz FL 712
4 models in this series
Deutz FL 712 (D 25 / D 40) – 1950s small tractors from Cologne: air-cooled two- and three-cylinders, 14.6 to 27.8 kW, 20 to 38 hp for smaller farms
The D 25 and D 40 models are among the small tractors with which Deutz reached smaller and mid-sized farms from Cologne in the 1950s, farms that did not yet need the brand's large field tractors. They are driven by air-cooled Deutz diesel engines with two to three cylinders, the brand's characteristic drive without coolant or radiator. The S suffix marks the more powerful engine version within each type.
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The register lists here four versions with 14.6 to 27.8 kW (20 to 38 hp) from two- to three-cylinder engines of 1,700 to 2,550 cm3 displacement. Unladen weight ranges from 1,320 to 2,050 kg, overall length from 2,940 to 3,420 mm, width from 1,552 to 1,740 mm and height from 1,520 to 1,840 mm. Rated speed sits between 1,800 and 2,300 rpm.
Small tractors like the D 25 and D 40 served the market of small farming operations in the 1950s that needed pulling power for field and transport work but could not or would not afford a large, expensive field tractor, competing with comparable small tractors from Fendt, Normag and Holder of the period.
On these now decades-old machines, what counts is the condition of the cooling fins and fan of the air cooling, the tightness of the injection pump and injectors, wear on the clutch and gearbox, and rust on the sheet metal and frame. Parts for the small Deutz engines are available through specialist vintage-tractor dealers and Deutz-Fahr clubs, no longer consistently through regular factory distribution.
Sources: SpecCodex register, model data: Deutz FL 712, Deutz (manufacturer)
Models compared
4 of 4 models.
| D 251959 | D 25 S1959 | D 401958–1959 | D 40 S1957–1959 | |
|---|---|---|---|---|
| Power | 14.6 kW | 18.3 kW | 25.6 kW | 27.8 kW |
| Rated speed | 1,800 rpm | 2,250 rpm | 2,150 rpm | 2,300 rpm |
| Linkage category | Cat I | Cat I | Cat I | Cat II |
| Cylinders | 2 | 2 | 3 | 3 |
| Displacement | 1,700 cm³ | 1,700 cm³ | 2,550 cm³ | 2,550 cm³ |
| Fuel tank capacity | 30 l | 30 l | 54 l | 54 l |
| Forward gears | 5 | 10 | – | – |
| Reverse gears | 1 | 2 | – | – |
| Top speed | 20 km/h | 20 km/h | 20 km/h | 20 km/h |
| Wheelbase | 1,780 mm | 1,780 mm | 2,109 mm | 2,109 mm |
| Length | 2,940 mm | 2,940 mm | 3,350 mm | 3,420 mm |
| Width | 1,590 mm | 1,590 mm | 1,552 mm | 1,740 mm |
| Height | 1,520 mm | 1,520 mm | 1,680 mm | 1,840 mm |
| Unladen weight | 1,325 kg | 1,320 kg | 1,750 kg | 2,050 kg |
Models
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
D 25
With the D 25, Deutz offers a model from the FL 712 series. Production: 1959. The engine delivers 20 hp (14.6 kW),...
D 25 S
The D 25 S from Deutz is part of the FL 712 series. Production: 1959. The engine delivers 25 hp (18.3 kW), has 2...
D 40
The D 40 from Deutz is part of the FL 712 series. Production: 1958–1959. The engine delivers 35 hp (25.6 kW), has 3...
D 40 S
The D 40 S from Deutz is part of the FL 712 series. Production: 1957–1959. The engine delivers 38 hp (27.8 kW), has...