O&K T18A
Built: 1950–1954 · Series: T18
More machines from model year 1950
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O&K T18A: single-cylinder diesel tractor from Orenstein & Koppel with 1.66 litres of displacement and 13.2 kW output, built between 1950 and 1954
Orenstein & Koppel, known as O&K, is a German engineering group focused on excavators, cranes and rail equipment; in the post-war years it also built small farm tractors alongside its main business.
Read on 3 more paragraphs
The T18A is powered by a single-cylinder diesel engine of 1.66 litres, delivering 13.2 kW at 1,500 rpm, roughly 18 hp. At an unladen weight of 1,400 kg, a height of 1,530 mm, a length of 2,550 mm, a width of 1,570 mm and a wheelbase of 1,600 mm, the machine has a design top speed of 19.8 km/h.
Single-cylinder diesel tractors of this power class were used on smaller and medium holdings in the 1950s for tillage, transport and light power-take-off work. A large displacement of 1.66 litres in a single cylinder gave high torque at low speed, typical of the rugged slow-running engines of the period; the build quality O&K was known for in excavators carried over to these small tractors, even though they were only a minor part of the company's line-up.
When buying a single-cylinder tractor like this, check the injection pump, the tightness of the cooling system and wear on clutch and gearbox. The drive belt and cooling fins are also worth checking on an engine this old; rust on load-bearing panels is common after decades of use. The condition of the fuel tank and its mounts is also worth checking, since corrosion there is common on tractors of this age.
Sources: SpecCodex-Register: Kennwerte des Modells O&K T18A, Orenstein & Koppel (Wikipedia)
Technical data
Engine
| Fuel | dieselcorrect |
|---|---|
| Power | 18 hp (13.2 kW)correct |
| Rated speed | 1,500 rpmcorrect |
| Cylinders | 1correct |
| Displacement | 1,662 cm³correct |
Dimensions and weights
| Length | 2,550 mmcorrect |
|---|---|
| Width | 1,570 mmcorrect |
| Height | 1,530 mmcorrect |
| Wheelbase | 1,600 mmcorrect |
| Ground clearance | 300 mmcorrect |
| Unladen weight | 1,400 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 5/1-manual gearbox gearboxcorrect |
| Forward gears | 5correct |
| Front tyres | 5, 5x16correct |
| Rear tyres | 8, 3x32correct |
| Top speed | 19.8 km/hcorrect |
Origin and approval
| Construction | frameless unit constructioncorrect |
|---|
Where this model stands
Power-to-weight ratio: 9.4 kW/t (13 kW / 1.4 t)
Power class: Compact (< 40 hp)
Stronger than 6% 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 O&K T18A have?
The O&K T18A delivers 18 hp.
How much does the O&K T18A weigh?
The unladen weight is 1,400 kg.
What engine does the O&K T18A have?
1 cylinders, 1,662 cm³ displacement, Diesel.
How fast does the O&K T18A go?
Top speed is 19.8 km/h.
What are the dimensions of the O&K T18A?
2,550 mm × 1,570 mm × 1,530 mm.
When was the O&K T18A built?
Production years: 1950–1954.
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 20 individual figures for this model. They come from 2 recorded sources; 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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Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.