Allis Chalmers D12: all source data
All 69 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.
Overview
Production| Manufacturer | Allis Chalmers |
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| (no label) | Row-Crop tractor |
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| (no label) | Built in West Allis, Wisconsin, USA |
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| Original price | $3,522 (1968) |
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Engine| (no label) | Allis-Chalmers 2.3L 4-cyl gasoline |
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| (no label) | Allis-Chalmers 2.4L 4-cyl gasoline |
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| Fuel tank | 12.5 gal | 47.3 L |
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Transmission| (no label) | 4-speed sliding gear |
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Power| Engine | 31 hp | 23.1 kW |
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| Drawbar (claimed) | 25.75 hp | 19.2 kW |
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| PTO (claimed) | 30 hp | 22.4 kW |
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| Drawbar (tested) | 29.43 hp | 21.9 kW |
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| PTO (tested) | 33.32 hp | 24.8 kW |
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Mechanical| (no label) | Two-wheel drive |
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| (no label) | Open operator station. |
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Hydraulics| Type | live |
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| Valves | 1 or 2 |
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Hitch| Rear Type | I |
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| Type | Snap-Couple |
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Dimensions| Wheelbase | 78.75 inches | 200 cm |
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| Weight | 2,800 lbs | 1270 kg |
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| Front tire | 5.00x15 |
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| Rear tire | 10x24 |
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Serial location| (no label) | Serial number stamped into the flange where the engine and transmission meet on the left side of the tractor. |
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Belt pulley| RPM | 1220 |
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| Speed | 2556 ft/min | 779.07 meters/min |
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Engine
Engine options| (no label) | Allis-Chalmers 2.3L 4-cyl gasoline |
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| (no label) | Allis-Chalmers 2.4L 4-cyl gasoline |
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Engine detail| (no label) | Allis-Chalmers |
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| (no label) | gasoline |
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| (no label) | 4-cylinder |
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| (no label) | liquid-cooled vertical L-head |
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| (no label) | Original engine, used until 149 ci engine appeared in 1961. |
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| Displacement | 138.7 ci | 2.3 L |
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| Bore/Stroke | 3.375x3.875 inches | 86 x 98 mm |
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| Power | 31 hp | 23.1 kW |
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| Air cleaner | oil bath |
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| Compression | 7.75:1 |
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| Rated RPM | 1650 |
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| Starter volts | 6 |
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| Oil capacity | 4 qts | 3.8 L |
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| Coolant capacity (Coolant) | 8 qts | 7.6 L |
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| (no label) | Allis-Chalmers |
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| (no label) | gasoline |
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| (no label) | 4-cylinder |
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| (no label) | liquid-cooled |
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| (no label) | The larger, 149 cubic inch, engine was introduced on the D12 at serial number 3001 in 1961. |
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| Displacement | 149 ci | 2.4 L |
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| Bore/Stroke | 3.50x3.875 inches | 89 x 98 mm |
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| Air cleaner | oil bath |
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| Compression | 7.5:1 |
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| Rated RPM | 1650 |
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| Firing order | 1-2-4-3 |
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Transmission
Transmission| Type | sliding gear |
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| Gears | 4 forward and 1 reverse |
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Dimensions
Tires| Ag front | 5.00x15 |
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| Ag rear | 10x24 |
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| Ag rear | 11x24 |
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Dimensions| Wheelbase | 78.75 inches | 200 cm |
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| Length | 121 inches | 307 cm |
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| Height (hood) | 52.5 inches | 133 cm |
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| Height (exhaust) | 76.5 inches | 194 cm |
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| Shipping weight | 2,800 lbs | 1270 kg |
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| Ballasted weight | 5,630 lbs | 2553 kg |
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| Clearance (front axle) | 20.25 inches | 51 cm |
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| Clearance (rear axle) | 22.25 inches | 56 cm |
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| Front tread | 49.3 to 80 inches | 125 to 203 cm |
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| Rear tread | 52 to 79.25 inches | 132 to 201 cm |
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