Heinrich Lanz D 7006
Built: 1943–1945 · Series: HNO
More machines from model year 1943
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Heinrich Lanz D 7006 (HNO): water-cooled single-cylinder wood-fired tractor with 7,274 cc, 18.3 kW and 2,360 kg from the years 1943 to 1945
Heinrich Lanz was a tractor manufacturer based in Mannheim, whose single-cylinder hot-bulb engines, sold under the "Bulldog" name, could run on a range of different fuels. The HNO series was built in the final years of the war, when mineral oil in Germany was rationed and agricultural machinery was converted to domestic fuels.
Read on 3 more paragraphs
The D 7006 is powered by a water-cooled single-cylinder engine of 7,274 cc, producing 25 hp, or 18.3 kW, at 850 rpm, and runs on wood. At a weight of 2,360 kg, a length of 3,320 mm, a height of 2,060 mm, a width of 1,600 mm and a wheelbase of 1,690 mm, the machine reaches a top speed of 15.1 km/h.
The switch to wood as a fuel was a wartime measure: the engine burned solid domestic fuel instead of mineral oil or diesel, which limited output and smoothness compared with the oil-fired original, but kept motorised pulling power available to agriculture independent of imports. The design's low top speed of just over 15 km/h was more than adequate for field work.
When buying such an old wartime tractor, the condition of the cylinder and piston matters most, since wood-fired engines wore faster than oil-fired ones due to deposits. Also worth checking are the radiator and water pump for leaks, the gearbox for noise, and the frame for rust; spare parts for this rare wartime series are now practically only available from collectors.
Sources: SpecCodex-Register: Kennwerte des Modells Heinrich Lanz D 7006
Technical data
Engine
| Fuel | Holzcorrect |
|---|---|
| Power | 25 hp (18.3 kW)correct |
| Rated speed | 850 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 7,274 cm³correct |
| Bore | 210 mmcorrect |
| Stroke | 210 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,320 mmcorrect |
|---|---|
| Width | 1,600 mmcorrect |
| Height | 2,060 mmcorrect |
| Wheelbase | 1,690 mmcorrect |
| Ground clearance | 330 mmcorrect |
| Unladen weight | 2,360 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 6V/2Rcorrect |
| Front tyres | 6.00-20correct |
| Rear tyres | 11, 25-24correct |
| Top speed | 15.1 km/hcorrect |
Origin and approval
| Construction | unit construction (no separate frame)correct |
|---|---|
| Units built | 1,435correct |
Where this model stands
Power-to-weight ratio: 7.8 kW/t (18 kW / 2.4 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 7006 have?
The Heinrich Lanz D 7006 delivers 25 hp.
How much does the Heinrich Lanz D 7006 weigh?
The unladen weight is 2,360 kg.
What engine does the Heinrich Lanz D 7006 have?
1 cylinders, 7,274 cm³ displacement, Holz.
How fast does the Heinrich Lanz D 7006 go?
Top speed is 15.1 km/h.
What are the dimensions of the Heinrich Lanz D 7006?
3,320 mm × 1,600 mm × 2,060 mm.
When was the Heinrich Lanz D 7006 built?
Production years: 1943–1945.
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 22 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: [1]
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.
