Heinrich Lanz D 7506 Allzweck
Built: 1939–1942 · Series: HN 4
More machines from model year 1939
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Heinrich Lanz D 7506 Allzweck: water-cooled multi-fuel single-cylinder Bulldog, 4,767 cc, 25 hp/18.3 kW and 2,880 kg weight, from 1939 to 1942
The D 7506 Allzweck belongs to the HN 4 series from Heinrich Lanz of Mannheim from the period shortly before and during the Second World War, and is one of the manufacturer's well-known Bulldog field tractors with the characteristic horizontal single-cylinder engine and hot-bulb ignition.
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The D 7506 Allzweck is powered by a water-cooled multi-fuel single-cylinder engine of 4,767 cc, producing 25 hp, or 18.3 kW, at 850 rpm. At a weight of 2,880 kg, a length of 2,980 mm, a height of 2,177 mm and a width of 1,670 mm, with a wheelbase of 1,755 mm, the machine is a medium-weight tractor whose top speed of 17.7 km/h also allowed for shorter road journeys.
The multi-fuel hot-bulb engine could run, depending on availability, on crude oil, diesel fuel and similar heavy fuels, which made the Lanz Bulldog especially practical in times of scarce or changing fuel supply. A tractor of this design was built for tillage, driving mounted implements through the pto shaft and versatile all-purpose use, as the model name suggests.
When buying a D 7506 Allzweck, the condition of the hot bulb and its preheating device matters, along with the radiator and coolant hoses of the single-cylinder engine. Also worth checking are the clutch and gearbox for wear noises and the brakes; parts for this widely produced Lanz Bulldog of these years are still readily available from specialist suppliers.
Sources: SpecCodex-Register: Kennwerte des Modells Heinrich Lanz D 7506 Allzweck
Technical data
Engine
| Fuel | Vielstoffcorrect |
|---|---|
| Power | 25 hp (18.3 kW)correct |
| Rated speed | 850 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 4,767 cm³correct |
| Bore | 170 mmcorrect |
| Stroke | 210 mmcorrect |
| Injection pressure | 80 barcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 2,980 mmcorrect |
|---|---|
| Width | 1,670 mmcorrect |
| Height | 2,177 mmcorrect |
| Wheelbase | 1,755 mmcorrect |
| Ground clearance | 470 mmcorrect |
| Unladen weight | 2,880 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 6V/2Rcorrect |
| Front tyres | 6.00-20correct |
| Rear tyres | 9.00-40correct |
| Top speed | 17.7 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|---|
| Units built | 6correct |
Where this model stands
Power-to-weight ratio: 6.4 kW/t (18 kW / 2.9 t)
Power class: Compact (< 40 hp)
Stronger than 12% 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 7506 Allzweck have?
The Heinrich Lanz D 7506 Allzweck delivers 25 hp.
How much does the Heinrich Lanz D 7506 Allzweck weigh?
The unladen weight is 2,880 kg.
What engine does the Heinrich Lanz D 7506 Allzweck have?
1 cylinders, 4,767 cm³ displacement, Vielstoff.
How fast does the Heinrich Lanz D 7506 Allzweck go?
Top speed is 17.7 km/h.
What are the dimensions of the Heinrich Lanz D 7506 Allzweck?
2,980 mm × 1,670 mm × 2,177 mm.
When was the Heinrich Lanz D 7506 Allzweck built?
Production years: 1939–1942.
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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Sources: Wikibooks Traktorenlexikon (CC BY-SA 4.0) (retrieved August 2026) · Values adopted and presented in our own form; changes from the source are possible. · How we check the data
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
