Heinrich Lanz HR 8
8 models in this series
Lanz Bulldog HR 8 – the hot-bulb Bulldogs from Mannheim: D 9506 to D 9550 and D 1500/1506, the last digits as hp class, single-cylinder two-stroke with hot bulb, multi-fuel operation, 540 to 750 rpm, 22 to 40 kW
The Lanz Bulldog is the tractor that became a generic name in Germany: Heinrich Lanz of Mannheim built from 1921, to the design of Fritz Huber, tractors with a single horizontal cylinder working as a two-stroke hot-bulb engine – no carburettor, no spark plug, a bulb heated with a blowlamp before starting, and the ability to burn crude oil, heavy oil, tar oil, diesel and vegetable oil: multi-fuel, as the register notes. The HR 8 range denotes the Bulldog generation of the 1930s to 1950s; the type logic: D stands for the version with pneumatic tyres and gearbox, the four-digit number orders the size, the last two digits give the hp class – D 9506 about 25 hp in the post-war grading, D 9511 about 35 hp, D 9550 about 55 hp – the D 1500 and D 1506 are the small post-war Bulldogs. Rated speeds lie at 540 to 750 rpm – the Bulldog runs so slowly that you can count the firing strokes.
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The register lists 8 versions with 22 to 40.3 kW from single-cylinders, unladen weights from 3,600 to 4,400 kg, lengths from 3,000 to 3,455 mm, widths from 1,780 to 1,865 mm and heights from 1,860 to 2,320 mm.
More than 200,000 Bulldogs were built up to the takeover of Lanz by John Deere in 1956; the hot-bulb layout ended in 1955 with the semi-diesel. The Bulldog is today Germany's most-collected tractor with its own club and rally culture.
On used tractors, originality, the condition of cylinder, piston and hot bulb, crankshaft and bearings, gearbox and clutch, the steering-wheel start (the steering wheel serves as the starting crank), sheet metal and wheels count; Bulldog specialists supply parts and reproductions.
Sources: SpecCodex register, model data: Lanz Bulldog HR 8, Lanz Bulldog (Wikipedia)
Models compared
8 of 8 models.
| D 15001937–1940 | D 15061937–1955 | D 95061939–1944 | D 95111934 | D 95211934–1936 | D 95311934–1944 | D 95391934–1944 | D 95501935–1936 | |
|---|---|---|---|---|---|---|---|---|
| Power | 36.6 kW | 40.3 kW | 22 kW | 22 kW | 22 kW | 22 kW | 22 kW | 22 kW |
| Rated speed | 750 rpm | 750 rpm | 540/630 rpm | 540/630 rpm | 540/630 rpm | 540/630 rpm | 540/630 rpm | 540/630 rpm |
| Cylinders | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Top speed | 7.5 km/h | 20 km/h | 16.7 km/h | 15.9 km/h | 17 km/h | 25.2 km/h | 25.2 km/h | 7.5 km/h |
| Wheelbase | 2,036 mm | 2,036 mm | 2,036 mm | 2,036 mm | 1,940 mm | 1,940 mm | 1,940 mm | – |
| Length | 3,440 mm | 3,455 mm | 3,455 mm | 3,455 mm | 3,300 mm | 3,300 mm | 3,300 mm | 3,000 mm |
| Width | 1,820 mm | 1,780 mm | 1,780 mm | 1,780 mm | 1,800 mm | 1,800 mm | 1,800 mm | 1,865 mm |
| Height | 2,315 mm | 2,185 mm | 2,185 mm | 2,185 mm | 1,860 mm | 1,860 mm | 2,090 mm | 2,320 mm |
| Unladen weight | 3,600 kg | 3,950 kg | 3,800 kg | 3,800 kg | 3,850 kg | 3,800 kg | 4,080 kg | 4,400 kg |
Models
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
D 1500
The Heinrich Lanz D 1500 belongs to the HR 8 series. Production: 1937–1940. The engine delivers 50 hp (36.6 kW), has...
D 1506
The Heinrich Lanz D 1506 is a model in the HR 8 series. Production: 1937–1955. The engine delivers 55 hp (40.3 kW),...
D 9506
The D 9506 from Heinrich Lanz is part of the HR 8 series. Production: 1939–1944. The engine delivers 30 hp (22 kW),...
D 9511
The HR 8 series from Heinrich Lanz includes the D 9511. Production: 1934. The engine delivers 30 hp (22 kW), has 1...
D 9521
The Heinrich Lanz D 9521 belongs to the HR 8 series. Production: 1934–1936. The engine delivers 30 hp (22 kW), has 1...
D 9531
The Heinrich Lanz D 9531 is a model in the HR 8 series. Production: 1934–1944. The engine delivers 30 hp (22 kW),...
D 9539
With the D 9539, Heinrich Lanz offers a model from the HR 8 series. Production: 1934–1944. The engine delivers 30 hp...
D 9550
The D 9550 from Heinrich Lanz is part of the HR 8 series. Production: 1935–1936. The engine delivers 30 hp (22 kW),...
