MAN B 45 A (2930 kg)
Built: 1955–1957 · Series: B
More machines from model year 1955
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MAN B – Ackerdiesel tractors from Nuremberg, B 18 A to B 45 A, two- to four-cylinder engines from 1.3 to 3.2 litres, 13.2 to 32.9 kW at 1,800 to 2,000 rpm
MAN built tractors in Nuremberg in the 1950s under the Ackerdiesel name; the B Series listed here comprises the models B 18 A/0, B 18 A/1 and B 45 A twice, in different versions. While the smaller B 18 models ran MAN's own engines, one version used an engine sourced from Güldner. Compared with the smaller K Series, the B Series covered a wider power range for mid-sized farms.
Read on 3 more paragraphs
The register lists here 4 versions with 13.2 to 32.9 kW (18 to 45 hp) rated output from two- to four-cylinder engines displacing 1,304 to 3,185 cc at 1,800 to 2,000 rpm. Unladen weights range from 1,540 to 3,000 kg, hydraulic lift capacity reaches 1,600 kg. Length, width and height range from 2,800 to 3,510 mm, 1,670 to 1,790 mm and 1,680 to 2,640 mm.
Spanning small two-cylinders to more powerful four-cylinders, the MAN B Series covered a broader field of the Nuremberg Ackerdiesel tractors than the smaller K Series and targeted mid-sized farms. After ending its own tractor production, MAN refocused on trucks and diesel engines for other applications.
When buying these early post-war tractors used, check the condition of the engine and injection pump depending on cylinder count, the tightness of the cooling and fuel systems, the clutch and gearbox, and rust on the frame and bodywork; parts are now only obtainable through collectors and vintage-vehicle specialists. as well as the function of the generator and the simple electrical system.
Sources: SpecCodex register, model data: MAN B
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 45 hp (32.9 kW)correct |
| Rated speed | 2000/1900 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 3,185 cm³correct |
| Bore | 96 mmcorrect |
| Stroke | 110 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,510 mmcorrect |
|---|---|
| Width | 1,790 mmcorrect |
| Height | 1,880 mmcorrect |
| Wheelbase | 2,140 mmcorrect |
| Ground clearance | 400 mmcorrect |
| Unladen weight | 2,930 kgcorrect |
Drivetrain and chassis
| Drive | four-wheel drivecorrect |
|---|---|
| Gearbox | 7/1-Getriebecorrect |
| Front tyres | 6.50-20correct |
| Rear tyres | 13-30, 11-28correct |
| Top speed | 21 km/hcorrect |
Working data
| Fuel tank capacity | 75 lcorrect |
|---|
Origin and approval
| Construction | frameless unit constructioncorrect |
|---|---|
| Units built | 781correct |
Where this model stands
Power-to-weight ratio: 11.2 kW/t (33 kW / 2.9 t)
Power class: Universal (40–100 hp)
Stronger than 28% 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 MAN B 45 A have?
The MAN B 45 A delivers 45 hp.
How much does the MAN B 45 A weigh?
The unladen weight is 2,930 kg.
What engine does the MAN B 45 A have?
4 cylinders, 3,185 cm³ displacement, Diesel.
How fast does the MAN B 45 A go?
Top speed is 21 km/h.
What are the dimensions of the MAN B 45 A?
3,510 mm × 1,790 mm × 1,880 mm.
When was the MAN B 45 A built?
Production years: 1955–1957.
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 24 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: [1]
Tractor in 3D section
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