Heinrich Lanz D 3506
Built: 1936–1952 · Series: HN 5
More machines from model year 1936
Not the right version? The data comes from vehicle registers holding many near-identical versions side by side. Photograph the data plate — we read make and type from it. Open the scanner e-mail address required
Heinrich Lanz HN 5 – the single-cylinder Bulldogs D 3500, D 3506 and D 3506 A from Mannheim: 4.8 litres displacement, 760 rpm, multi-fuel operation
The HN 5 belongs to the classic Lanz Bulldog ranges from Mannheim, where Heinrich Lanz built farm machinery from 1859 and, from 1921, the Bulldog with its characteristic single-cylinder two-stroke hot-bulb engine. The types listed here, the D 3500, D 3506 and D 3506 A, share the large horizontal single-cylinder of 4,767 cm³ displacement and the low speed typical of the Bulldog.
Read on 3 more paragraphs
The register lists here 3 versions with 12.4 to 14.6 kW from the uniform single-cylinder of 4,767 cm³ displacement at a uniform rated speed of 760 rpm. Unladen weights range from 1,850 to 2,140 kg, lengths from 2,540 to 2,840 mm, widths from 1,416 to 1,505 mm and heights from 1,950 to 2,055 mm; all versions run on multiple fuels.
The Bulldog's multi-fuel engine could burn crude oil, tar oil and other cheap fuels besides diesel, which made it attractive to farmers in times of scarce and expensive fuel; the HN 5 thus stood in the post-war years for simple, robust drive technology on mid-size farms.
On a used example, the condition of the hot bulb and cylinder liner, tightness of the cooling, condition of the large flywheel and the starting crank, and rust on mudguards and bonnet count; parts for the single-cylinder Bulldog engine are available through specialist Lanz Bulldog mechanics and vintage-machinery dealers.
Sources: SpecCodex register, model data: Heinrich Lanz HN 5
Technical data
Engine
| Fuel | Vielstoffcorrect |
|---|---|
| Power | 20 hp (14.6 kW)correct |
| Rated speed | 760 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 4,767 cm³correct |
| Bore | 170 mmcorrect |
| Stroke | 210 mmcorrect |
| Injection pressure | 80 barcorrect |
| Cooling | circulating coolingcorrect |
Dimensions and weights
| Length | 2,540 mmcorrect |
|---|---|
| Width | 1,425 mmcorrect |
| Height | 1,950 mmcorrect |
| Wheelbase | 1,680 mmcorrect |
| Ground clearance | 235 mmcorrect |
| Unladen weight | 2,140 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 6V/2Rcorrect |
| Front tyres | 5.50-16correct |
| Rear tyres | 9.00-24correct |
| Top speed | 18.5 km/hcorrect |
Origin and approval
| Construction | Block-Konstruktioncorrect |
|---|---|
| Units built | 17000 alle Versionencorrect |
Where this model stands
Power-to-weight ratio: 6.8 kW/t (15 kW / 2.1 t)
Power class: Compact (< 40 hp)
Stronger than 7% of the tractors in the register — out of 15,663 models with a stated power figure.
Calculated from the documented figures above — not a rating.
Frequently asked questions
How much power does the Heinrich Lanz D 3506 have?
The Heinrich Lanz D 3506 delivers 20 hp.
How much does the Heinrich Lanz D 3506 weigh?
The unladen weight is 2,140 kg.
What engine does the Heinrich Lanz D 3506 have?
1 cylinders, 4,767 cm³ displacement, Vielstoff.
How fast does the Heinrich Lanz D 3506 go?
Top speed is 18.5 km/h.
What are the dimensions of the Heinrich Lanz D 3506?
2,540 mm × 1,425 mm × 1,950 mm.
When was the Heinrich Lanz D 3506 built?
Production years: 1936–1952.
What to check before buying
- Check the hour meter against the service records — a replaced instrument is the most common gap.
- Compare the data plate and chassis number with the papers.
- Check the weights in the papers against the figures here — attachments change them.
- Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
- Shift the gearbox cold and warm — jumps only show up at temperature.
- Load the hydraulics and watch for sag.
- Ask about parts availability for this build year — the running costs hang on it.
A general list for this type of machine — no substitute for an inspection or an appraiser.
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This page carries 23 individual figures for this model. They come from 1 recorded source; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.
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Other models in this series
Sources: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · How we check the data
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