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| info | |
| 1937 - 1942, Agricultural Crawler tractor |
| Production | |
| Manufacturer: | Allis Chalmers |
| Factory: | Springfield, Illinois, USA |
| Total built: | 1,225 |
| Variants | |
| S: | gasoline |
| SO: | spark-ignition diesel |
| WS: | wide |
| Capacity | |
| Fuel: | 64 gal [242.2 L] |
| Dimensions & Tires | |
| Weight: | 20,100 lbs [9117 kg] |
| Front tire: | tracks |
| Rear tire: | tracks |
| S Serial Numbers | |
| Location: | transmission case or instrument panel |
| Allis Chalmers S Power | |
| Drawbar (claimed): | 48 hp [35.8 kW] |
| Belt (claimed): | 66 hp [49.2 kW] |
| Drawbar (tested): | 68.9 hp [51.4 kW] |
| PTO (tested): | 84.3 hp [62.9 kW] |
| Belt (tested): | 74.82 hp [55.8 kW] |
| Mechanical | |
| Chassis: | crawler |
| Cab: | Open operator station. |
| Battery | |
| Volts: | 6 |
| info | |
| Bore/Stroke: | 5.75x6.50 inches [146 x 165 mm] |
| Fuel system: | mechancal injection |
| Air cleaner: | oil bath |
| Compression: | 6.5:1 |
| Rated RPM: | 1050 |
| Starter volts: | 6 |
| Coolant capacity: | 50 qts [47.3 L] |
| Engine Detail | |
| Oil engine, burned diesel with fuel injection and spark ignition, used on the SO model, Allis Chalmers, diesel, 4-cylinder, liquid-cooled vertical I-head, 675.1 ci [11.1 L] |
| Transmission | |
| Type: | gear |
| Gears: | 5 forward and 1 reverse |
| Clutch: | dry disc |
| Dimensions | |
| Weight: | 20,100 lbs [9117 kg] |
| Length: | 146 inches [370 cm] |
| Width: | 97 inches [246 cm] |
| Height: | 74 inches [187 cm] |
| Allis Chalmers S Tires | |
| Ag front: | tracks |
| Ag rear: | tracks |