Allis Chalmers HD21: all source data
All 30 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) | Agricultural Crawler tractor |
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| (no label) | Built in Springfield, Illinois, USA |
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Engine| (no label) | Allis-Chalmers 13.8L 6-cyl diesel |
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| Fuel tank | 135 gal | 511.0 L |
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Transmission| (no label) | 2-speed torque converter |
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Power| Engine | 225 hp | 167.8 kW |
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| Drawbar (tested) | 135.12 hp | 100.8 kW |
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Mechanical| Drive | crawler |
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| (no label) | Contracting band brakes |
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| (no label) | Open operator station. |
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Dimensions| Weight | 45500 lbs | 20638 kg |
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| (no label) | Tracks |
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Engine
Engine detail| (no label) | Allis-Chalmers |
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| (no label) | supercharged diesel |
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| (no label) | 6-cylinder |
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| (no label) | liquid-cooled vertical I-head |
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| Displacement | 844 ci | 13.8 L |
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| Bore/Stroke | 5.25x6.50 inches | 133 x 165 mm |
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| Power | 225 hp | 167.8 kW |
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| Air cleaner | oil bath |
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| Compression | 13.3:1 |
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| Rated RPM | 1800 |
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| Starter volts | 24 |
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| Coolant capacity (Coolant) | 80 qts | 75.7 L |
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Transmission
Transmission| Type | torque converter |
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| Gears | 2 forward and 1 reverse |
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Dimensions
Dimensions| Length | 198 inches | 502 cm |
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| Height | 99 inches | 251 cm |
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| Weight | 45500 lbs | 20638 kg |
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