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| info | |
| The Massey-Harris Pacemaker replaced the Wallis 12/20 in Massey's line. The Twin Power feature increased engine rpms to provide additional horsepower for belt work. The Pacemaker was a standard (wide) front tractor, while the Challenger was the row-crop version. |
| Production | |
| Manufacturer: | Massey-Harris |
| Factory: | Racine, Wisconsin, USA |
| Capacity | |
| Fuel: | 18 gal [68.1 L] |
| Aux. fuel: | 1.6 gal [6.1 L] |
| Dimensions & Tires | |
| Wheelbase: | 78 inches [198 cm] |
| Weight: | 3700 lbs [1678 kg] |
| Front tire: | 28x5 |
| Rear tire: | 44x10 |
| Pacemaker Serial Numbers | |
| Location: | On rear-left portion of tractor frame. |
| Massey-Harris Pacemaker Power | |
| Drawbar (claimed): | 16 hp [11.9 kW] |
| Belt (claimed): | 27 hp [20.1 kW] |
| Drawbar (tested): | 30.58 hp [22.8 kW] |
| Belt (tested): | 42.13 hp [31.4 kW] |
| Mechanical | |
| Chassis: | 4x2 2WD |
| Steering: | manual |
| Cab: | Open operator station. |
| Belt Pulley | |
| Diameter: | 12 inches [30 cm] |
| Width: | 6.25 inches [15 cm] |
| RPM: | 832 |
| info | |
| Bore/Stroke: | 3.875x5.25 inches [98 x 133 mm] |
| Rated RPM: | 1200, 1400*Twin Power option |
| Coolant capacity: | 20 qts [18.9 L] |
| Engine Detail | |
| Massey-Harris, gasoline, 4-cylinder, liquid-cooled vertical I-head, 247.7 ci [4.1 L] |
| Transmission | |
| Type: | gear |
| Gears: | 4 forward and 1 reverse |
| Clutch: | mechanical dry disc |
| Dimensions | |
| Weight: | 3700 lbs [1678 kg] |
| Wheelbase: | 78 inches [198 cm] |
| Length: | 122 inches [309 cm] |
| Height: | 53 inches [134 cm] |
| Massey-Harris Pacemaker Tires | |
| Ag front: | 6.00x16 |
| Ag rear: | 11.25x24 |