Schlüter SL 15
Built: 4/1959–2/1962 · Series: SL
More machines from model year 1959
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Schlüter SL 15: air-cooled single-cylinder tractor rated at 11 kW, 1,256 cc displacement and 1,150 kg weight from the late-1950s SL range
Schlüter was a German tractor manufacturer based in Freising in Bavaria, building a wide power range from the 1930s until it ceased tractor production in 1993, from compact single-cylinders to the high-output large tractors it later became known for. The SL range counted among the company's simple, light models of the late 1950s.
Read on 3 more paragraphs
The SL 15 is powered by an air-cooled single-cylinder engine of 1,256 cc, producing 11 kW (15 hp) at 1,500 rpm. At a weight of 1,150 kg, a wheelbase of 1,717 mm and a width of 1,580 mm, the tractor reaches a design top speed of 20 km/h. Height stands at 1,500 mm and length at 2,610 mm. The engine runs on diesel.
An air-cooled single-cylinder of just over a litre marks one of the lightest field tractors of its time, the kind used on smaller farms, in orchards and for grassland upkeep. The 20 km/h top speed falls within the L driving licence category, and the power take-off on tractors of this era usually ran at 540 rpm, with no three-point hitch to today's standard yet fitted.
Buying a used single-cylinder this light and this old, the air cooling with its fan and cooling fins, along with the function of the injection pump, deserve particular attention. Also worth checking at inspection are the sheet metal for rust damage and tyre condition after decades of possible idle storage.
Sources: SpecCodex-Register: Kennwerte des Modells SL 15
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 15 hp (11 kW)correct |
| Rated speed | 1,500 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 1,256 cm³correct |
| Cooling | air-cooledcorrect |
Dimensions and weights
| Length | 2,610 mmcorrect |
|---|---|
| Width | 1,580 mmcorrect |
| Height | 1,500 mmcorrect |
| Wheelbase | 1,717 mmcorrect |
| Ground clearance | 325 mmcorrect |
| Unladen weight | 1,150 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 6/1-manual gearbox gearboxcorrect |
| Forward gears | 6correct |
| Front tyres | 4.50-16correct |
| Rear tyres | 8-24, 8-28, 9-24, 10-24correct |
| Top speed | 20 km/hcorrect |
Working data
| Fuel tank capacity | 20 lcorrect |
|---|
Origin and approval
| Construction | frameless unit constructioncorrect |
|---|---|
| Units built | 310correct |
Where this model stands
Power-to-weight ratio: 9.6 kW/t (11 kW / 1.1 t)
Power class: Compact (< 40 hp)
Stronger than 3% 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 Schlüter SL 15 have?
The Schlüter SL 15 delivers 15 hp.
How much does the Schlüter SL 15 weigh?
The unladen weight is 1,150 kg.
What engine does the Schlüter SL 15 have?
1 cylinders, 1,256 cm³ displacement, Diesel.
How fast does the Schlüter SL 15 go?
Top speed is 20 km/h.
What are the dimensions of the Schlüter SL 15?
2,610 mm × 1,580 mm × 1,500 mm.
When was the Schlüter SL 15 built?
Production years: 4/1959–2/1962.
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.