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| info | |
| 1930 - 1936, Standard-tread tractor | |
| Previous model: | Allis Chalmers 20-35 |
| Next model: | Allis Chalmers A |
| Production | |
| Manufacturer: | Allis Chalmers |
| Factory: | West Allis, Wisconsin, USA |
| Total built: | 2,426 |
| Capacity | |
| Fuel: | 30 gal [113.6 L] |
| Aux. fuel: | 1 gal [3.8 L] |
| Dimensions & Tires | |
| Weight: | 7,000 lbs [3175 kg] |
| Front tire: | 36x6 |
| Rear tire: | 50x12 |
| 25-40 Serial Numbers | |
| Location: | front of shifter on transmission case |
| Allis Chalmers 25-40 Power | |
| Drawbar (claimed): | 27 hp [20.1 kW] |
| Belt (claimed): | 42.6 hp [31.8 kW] |
| Drawbar (tested): | 33.82 hp [25.2 kW] |
| Belt (tested): | 47.00 hp [35.0 kW] |
| Mechanical | |
| Chassis: | 4x2 2WD |
| Steering: | manual |
| Cab: | Open operator station. |
| info | |
| Bore/Stroke: | 5.00x6.50 inches [127 x 165 mm] |
| Rated RPM: | 1000 |
| Coolant capacity: | 40 qts [37.9 L] |
| Engine Detail | |
| Allis Chalmers, gasoline, 4-cylinder, liquid-cooled vertical I-head, 510.5 ci [8.4 L] |
| info | |
| Previous model: | Allis Chalmers 20-35 |
| Next model: | Allis Chalmers A |
| Transmission | |
| Type: | gear |
| Gears: | 2 forward and 1 reverse |
| info | |
| Previous model: | Allis Chalmers 20-35 |
| Next model: | Allis Chalmers A |
| Dimensions | |
| Weight: | 7,000 lbs [3175 kg] |
| Length: | 152 inches [386 cm] |
| Width: | 76 inches [193 cm] |
| Height: | 65 inches [165 cm] |
| Allis Chalmers 25-40 Tires | |
| Ag front: | 36x6 steel |
| Ag rear: | 50x12 steel |