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| info | |
| 1916 - 1924, Standard-tread tractor | |
| Next model: | Heider C 15-27 |
| Production | |
| Manufacturer: | Rock Island |
| Factory: | Rock Island, Illinois, USA |
| Capacity | |
| Fuel: | 21 gal [79.5 L] |
| Rear Hitch | |
| Type: | Heider Plow Lift |
| Dimensions & Tires | |
| Wheelbase: | 96 inches [243 cm] |
| Weight: | 6,000 lbs [2721 kg] |
| Front tire: | 30x5 |
| Rear tire: | 57x10 |
| C 12-20 Serial Numbers | |
| - Serial numbers unknown -, |
| Links | |
| Heider C: information at RIPC site |
| Heider C 12-20 Power | |
| Drawbar (claimed): | 9 hp [6.7 kW] |
| Belt (claimed): | 16 hp [11.9 kW] |
| Plows: | 4 |
| Drawbar (tested): | 13.43 hp [10.0 kW] |
| Belt (tested): | 24.24 hp [18.1 kW] |
| Mechanical | |
| Chassis: | 4x2 2WD |
| Steering: | manual |
| Cab: | Four-post canopy. |
| info | |
| Bore/Stroke: | 4.50x6.75 inches [114 x 171 mm] |
| Rated RPM: | 900 |
| Coolant capacity: | 36 qts [34.1 L] |
| Engine Detail | |
| Waukesha, kerosene, 4-cylinder, liquid-cooled, 429 ci [7.0 L] |
| info | |
| Next model: | Heider C 15-27 |
| Transmission | |
| Type: | friction drive |
| Gears: | 7 forward and reverse |
| info | |
| Next model: | Heider C 15-27 |
| Dimensions | |
| Weight: | 6,000 lbs [2721 kg] |
| Wheelbase: | 96 inches [243 cm] |
| Length: | 144 inches [365 cm] |
| Width: | 74 inches [187 cm] |
| Height: | 96 inches [243 cm] |
| Heider C 12-20 Tires | |
| Ag front: | 30x5 steel |
| Ag rear: | 57x10 steel |