JI Case 311
Built: 1956–1958 · Series: Hunderter-Baureihe
More machines from model year 1956
J.I. Case hundred series (1953–1958) – the tractors from Racine between the letters and the 30s: 300 to 600, the hundreds number as size class, the 500 as first Case diesel, petrol, LPG and diesel
The hundred series replaced at J.I. Case of Racine, Wisconsin, the letter tractors of the pre-war period – the models S, D and LA that had run since 1939. The start was made in 1953 by the Case 500, the company's first diesel tractor, with a six-cylinder of 6.2 litres (377 cubic inches) and PTO; in 1955 the 400 followed as the medium and in 1956 the 300 as the small model, in 1957 the 600 as successor to the 500. The type logic: the hundreds number orders the size class in ascending order, the sub-variants 301, 311, 401 and 411 mark versions with a different layout or fuel type – petrol, LPG or diesel – Case in this period assigning the extra digits by equipment and drive. The engines are Case's own four- and six-cylinders with low rated speeds of 1,350 to 1,750 rpm, as characterise the American standard tractors of the 1950s.
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The register lists 8 versions with 19.9 to 51.5 kW from engines of 2,420 to 6,178 cm³, unladen weights from 1,542 to 3,687 kg, lengths from 3,175 to 3,700 mm, widths from 1,692 to 2,170 mm and heights from 1,422 to 2,325 mm.
In 1958 the 30 series (430 to 930) followed with the Case-o-matic torque-converter transmission – the hundreds are thus the short transitional generation in which Case introduced the diesel, and today sought-after collectors' pieces in the Desert Sunset livery.
On used tractors, originality, engine condition and carburettor or injection, clutch, gearbox and hydraulics (Eagle Hitch), sheet metal and tyres count; parts run through collector dealers in North America.
Sources: SpecCodex register, model data: J.I. Case Hunderter-Baureihe, J. I. Case Company (Wikipedia)
Technical data
Engine
| Fuel | petrolcorrect |
|---|---|
| Power | 29 hp (21.3 kW)correct |
| Rated speed | 1,750 rpmcorrect |
| Cylinders | 4correct |
| Displacement | 2,420 cm³correct |
| Bore | 85.73 mmcorrect |
| Stroke | 104.8 mmcorrect |
| Compression ratio | 7.1correct |
| Cooling | water-cooledcorrect |
Dimensions and weights
| Length | 3,327 mmcorrect |
|---|---|
| Height | 1,549 mmcorrect |
| Wheelbase | 2,143 mmcorrect |
| Ground clearance | 530 mmcorrect |
| Unladen weight | 1,615 kgcorrect |
Drivetrain and chassis
| Drive | rear-wheel drivecorrect |
|---|---|
| Gearbox | 4 V/1 R or 12 V/3 Rcorrect |
| Front tyres | 5.50 x 16"correct |
| Rear tyres | 12 x 28"correct |
| Top speed | 20 km/hcorrect |
Origin and approval
| Construction | frame constructioncorrect |
|---|---|
| Units built | 8,465correct |
Where this model stands
Power-to-weight ratio: 13.2 kW/t (21 kW / 1.6 t)
Power class: Compact (< 40 hp)
Stronger than 16% 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 JI Case 311 have?
The JI Case 311 delivers 29 hp.
How much does the JI Case 311 weigh?
The unladen weight is 1,615 kg.
What engine does the JI Case 311 have?
4 cylinders, 2,420 cm³ displacement, Benzin.
How fast does the JI Case 311 go?
Top speed is 20 km/h.
What are the dimensions of the JI Case 311?
3,327 mm × 1,549 mm.
When was the JI Case 311 built?
Production years: 1956–1958.
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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Other models in this series
Sources: [1]
Tractor in 3D section
Turn the model, look inside and click an assembly — each one is explained.