Allis Chalmers 15-30/18-30
Built: 1918–1921 · Series: Baureihe-E
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Allis-Chalmers Series E, types 15-30/18-30 to 25-40 – early four-cylinder tractors from Milwaukee with kerosene and petrol engines, 7,556 to 8,361 cm³ displacement
Allis-Chalmers of Milwaukee, Wisconsin, was among the major US tractor makers of the 1920s. As was customary for other brands of the time, the double name of the early types 15-30/18-30, 20-25 and 25-40 states the drawbar and belt horsepower, the standard measure of a tractor's performance at the time. Such models with an open steel frame and driver's seat without a cab were the industry-standard design of the 1920s, before enclosed cabs became widespread.
Read on 3 more paragraphs
The register lists 3 versions with 13.1 to 25.2 kW from four-cylinder engines of 7,556 to 8,361 cm³ displacement, run on kerosene or petrol blends. Unladen weights range from 2,722 to 3,266 kg, lengths from 3,429 to 3,861 mm, widths from 1,676 to 1,905 mm, at a height of 1,727 mm.
The large-displacement, low-revving kerosene and petrol engines were typical of the transitional period before diesel became widespread in agricultural machinery; such tractors pulled multi-bottom ploughs and drove stationary threshers via the belt pulley. The cleated iron wheels fitted to these early tractors were intended for field use and were not approved for road travel.
When buying used from this early series, what counts above all is preservation and originality, the condition of cylinders and carburettor, the cooling system and belt pulley, and corrosion on panels and frame; parts run exclusively through specialist vintage tractor restorers.
Sources: SpecCodex register, model data: Allis-Chalmers Baureihe E
Technical data
Engine
| Fuel | Kerosin/Benzincorrect |
|---|---|
| Power | 17.8 hp (13.1 kW)correct |
| Rated speed | 830/930 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 7,556 cm³correct |
| Bore | 120.7 mmcorrect |
| Stroke | 165.1 mmcorrect |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,429 mmcorrect |
|---|---|
| Width | 1,676 mmcorrect |
| Height | 1,727 mmcorrect |
| Wheelbase | 2,438 mmcorrect |
| Unladen weight | 2,722 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 2 V/1 Rcorrect |
| Forward gears | 2correct |
| Reverse gears | 1correct |
| Front tyres | 914 x 152correct |
| Rear tyres | 1.270 x 305correct |
| Top speed | 5 km/hcorrect |
Working data
| Fuel tank capacity | 114 lcorrect |
|---|
Origin and approval
| Construction | frame constructioncorrect |
|---|---|
| Units built | 1.161 beidecorrect |
Where this model stands
Power-to-weight ratio: 4.8 kW/t (13 kW / 2.7 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 Allis Chalmers 15-30/18-30 have?
The Allis Chalmers 15-30/18-30 delivers 17.8 hp.
How much does the Allis Chalmers 15-30/18-30 weigh?
The unladen weight is 2,722 kg.
What engine does the Allis Chalmers 15-30/18-30 have?
4 cylinders, 7,556 cm³ displacement, Kerosin/Benzin.
How fast does the Allis Chalmers 15-30/18-30 go?
Top speed is 5 km/h.
What are the dimensions of the Allis Chalmers 15-30/18-30?
3,429 mm × 1,676 mm × 1,727 mm.
When was the Allis Chalmers 15-30/18-30 built?
Production years: 1918–1921.
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
Turn the model, look inside and click an assembly — each one is explained.