Heinrich Lanz HR 6
4 models in this series
Heinrich Lanz HR 6 – Bulldog tractors from Mannheim, D 6506 to D 6550, horizontal single-cylinder rated at 16.1 kW, multi-fuel operation at 540/630 rpm
Heinrich Lanz built the HR 6 Series at its Mannheim plant; the four models D 6506, D 6511, D 6520 and D 6550 all carry the same horizontal single-cylinder engine rated at 16.1 kW. Like the classic Lanz Bulldog tractors, the engine ran on multiple fuels, including lower-grade ones. In 1956, John Deere took over the Mannheim works, which continue to this day as a John Deere plant.
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The register lists here 4 versions with 16.1 kW rated output from the single-cylinder at a rated speed of 540/630 rpm. Unladen weights range from 3,000 to 4,400 kg, length, width and height from 3,000 to 3,370 mm, 1,670 to 2,280 mm and 1,575 to 2,320 mm.
The Lanz Bulldog, with its distinctive slow-running single-cylinder, shaped the image of German agriculture for decades and, thanks to its robustness and simple maintenance, was especially widespread on smaller and mid-sized farms. Parts and technical knowledge for the Bulldog models are still maintained today by an active collector and club scene.
When buying these Bulldog models used, check the condition of the single-cylinder and its ignition system, the tightness of the cooling and fuel systems, the clutch and gearbox, and rust on the frame and bodywork; parts are supplied by specialist Bulldog dealers. Rust and leaks at the radiator usually reveal themselves already during a test run.
Sources: SpecCodex register, model data: Heinrich Lanz HR 6
Models compared
4 of 4 models.
| D 65061931–1935 | D 65111931–1935 | D 65201931–1935 | D 65501933–1934 | |
|---|---|---|---|---|
| Power | 16.1 kW | 16.1 kW | 16.1 kW | 16.1 kW |
| Rated speed | 540/630 rpm | 540/630 rpm | 540/630 rpm | 540/630 rpm |
| Cylinders | 1 | 1 | 1 | 1 |
| Top speed | 8 km/h | 13.4 km/h | 16.6 km/h | 7.28 km/h |
| Wheelbase | 1,964 mm | 1,864 mm | 1,864 mm | – |
| Length | 3,370 mm | 3,090 mm | 3,050 mm | 3,000 mm |
| Width | 1,670 mm | 1,912 mm | 2,280 mm | 1,865 mm |
| Height | 2,300 mm | 2,150 mm | 1,575 mm | 2,320 mm |
| Unladen weight | 3,000 kg | 3,950 kg | 3,700 kg | 4,400 kg |
Models
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
D 6506
The Heinrich Lanz D 6506 belongs to the HR 6 series. Production: 1931–1935. The engine delivers 22 hp (16.1 kW), has...
D 6511
With the D 6511, Heinrich Lanz offers a model from the HR 6 series. Production: 1931–1935. The engine delivers 22 hp...
D 6520
The Heinrich Lanz D 6520 is a model in the HR 6 series. Production: 1931–1935. The engine delivers 22 hp (16.1 kW),...
D 6550
With the D 6550, Heinrich Lanz offers a model from the HR 6 series. Production: 1933–1934. The engine delivers 22 hp...
