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Heinrich Lanz D 2539

Built: 1937–1954 · Series: HR 9

More machines from model year 1937

Source: https://en.wikipedia.org/wiki/File:Utilaje_agricole,_1939_La

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The D 2539 from Heinrich Lanz is part of the HR 9 series. Production: 1937–1954. The engine delivers 55 hp (40.3 kW), has 1 cylinder. Rated speed is 750 rpm. The machine is 3,920 mm long, 2,500 mm wide and 2,150 mm high. The unladen weight is 4,540 kg. The wheelbase measures 2,515 mm. Ground clearance is 275 mm. Top speed is 32.8 km/h. Transmission: 5/1-manual gearbox. The engine is water-cooled. Tyres: front 7,00-20, rear 10.50-24. The fuel is Gasöl. Braunkohlenteeröl. Dieselöl. Paraffinöl. Benzin usw,. The bore measures 225 mm. The stroke is 260 mm. Construction: frameless unit construction. Injection pressure is 80 bar. Rated output across the Heinrich Lanz range ranges from 12 to 60 hp; the D 2539 sits at the top of that range with 55 hp. Its immediate neighbours are the D 5016 below it with 50 hp and the D 5806 above it with 58 hp. Rated output across the Heinrich Lanz range ranges from 8.8 to 43.9 kW; here the D 2539 sits at the top of that range with 40.3 kW. 89 Heinrich Lanz models across 27 series are on record.

Heinrich Lanz HR 9: heavy single-cylinder Bulldog from Mannheim, D 2531 and D 2539, 40.3 kW at 750 rpm, running on gas oil, lignite tar oil, diesel oil, paraffin oil or petrol

Heinrich Lanz AG, with its plant in Mannheim, built the Bulldog, a single-cylinder hot-bulb tractor that ran at low revs with high torque and could run on simple, varying fuels. This page collects the HR 9, recorded here as the D 2531 and D 2539; hot-bulb technology dispensed with a spark plug and a classic injector, making the machine insensitive to fuel quality.

Read on 3 more paragraphs

The register lists 2 versions rated at 40.3 kW from the single-cylinder engine at 750 rpm. Kerb weights range from 4,300 to 4,540 kg, lengths from 3,900 to 3,920 mm, widths from 2,160 to 2,500 mm, with a height of 2,150 mm. Gas oil, raw lignite tar oil, diesel oil, paraffin oil and petrol are recorded as fuel.

This multi-fuel capability was the central selling point of the Bulldog line: in times of scarce or expensive diesel fuel, farmers could switch to cheaper substitutes without converting the engine. The heavy, low-slung build also delivered high pulling power for tillage work.

When buying a used example, check the condition of the hot bulb and cylinder liner, the tightness of the cooling system, the state of clutch and gearbox, and corrosion on frame and wings; given the great age of these machines, spare parts are mostly sourced through Bulldog collectors and specialist restoration workshops, and a solid understanding of hot-bulb technology is essential for operation.

Sources: SpecCodex register, model data: Heinrich Lanz HR 9

Technical data

Engine

Fuel	Gasöl, Braunkohlenteeröl, Dieselöl, Paraffinöl, Benzin usw.correct
Power	55 hp (40.3 kW)correct
Rated speed	750 rpmcorrect
Cylinders	1correct
Bore	225 mmcorrect
Stroke	260 mmcorrect
Injection pressure	80 barcorrect
Cooling	water-cooledcorrect

Dimensions and weights

Length	3,920 mmcorrect
Width	2,500 mmcorrect
Height	2,150 mmcorrect
Wheelbase	2,515 mmcorrect
Ground clearance	275 mmcorrect
Unladen weight	4,540 kgcorrect

Drivetrain and chassis

Drive	rear-wheel drivecorrect
Gearbox	5/1-manual gearbox gearboxcorrect
Front tyres	7, 00-20correct
Rear tyres	10.50-24correct
Top speed	32.8 km/hcorrect

Origin and approval

Construction	frameless unit constructioncorrect

Where this model stands

Power-to-weight ratio: 8.9 kW/t (40 kW / 4.5 t)

Power class: Universal (40–100 hp)

Stronger than 38% 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 2539 have?

The Heinrich Lanz D 2539 delivers 55 hp.

How much does the Heinrich Lanz D 2539 weigh?

The unladen weight is 4,540 kg.

What engine does the Heinrich Lanz D 2539 have?

1 cylinders, Gasöl, Braunkohlenteeröl, Dieselöl, Paraffinöl, Benzin usw..

How fast does the Heinrich Lanz D 2539 go?

Top speed is 32.8 km/h.

What are the dimensions of the Heinrich Lanz D 2539?

3,920 mm × 2,500 mm × 2,150 mm.

When was the Heinrich Lanz D 2539 built?

Production years: 1937–1954.

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 21 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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