The Allis Chalmers D21 Series II is a 2WD row-crop tractor from the series. This tractor was manufactured by Allis Chalmers in West Allis, Wisconsin, USA from 1965 to 1969. The Allis Chalmers D21 is equipped with a 7.0 L (425.9 cu·in) six-cylinder diesel engine and a sliding gear with dry disc clutch transmission with 8 forward and 2 reverse gears.
The AC D21 Series II row-crop tractor used the Allis Chalmers 3500 engine. It is a 7.0 L, 6,980 cm2, (426.0 cu·in) six-cylinder natural aspirated diesel engine with 108.0 mm (4.25 in) of the cylinder bore and 127.0 mm (5 in) of the piston stroke. The compression ratio rating is 16.0:1. This engine produced 122.7 PS (90.2 kW; 121.0 HP) at 2,200 rpm of output power.
The Allis Chalmers D21 is equipped with power steering, band actuated disc brakes, open operator station, and 196.8 liters (52 US gal.; 43.3 Imp. gal) fuel tank.
Allis Chalmers D21 Specifications
| General Specifications | |
| Model | Allis Chalmers D21 |
| Length | 4,070 mm (160.2 in) |
| Width | 2,320 mm (91.3 in) |
| Height | 2,700 mm (106.3 in) |
| Wheel base | 2,440 mm (96.1 in) |
| Weight | 4,310 kg (9,502 lbs) |
| Fuel tank capacity | 196.8 liters (52 US gal.; 43.3 Imp. gal) |
| Battery | Two or four 12V, 95Ah |
| Cabin type | Open operator station |
| Engine | |
| Engine model | Allis Chalmers 3500 |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 6 |
| Fuel type | Diesel |
| Displacement | 7.0 L, 6,980 cm2, (426.0 cu·in) |
| Bore and stroke | 108.0 mm X 127.0 mm (4.25 in X 5 in) |
| Compression ratio | 16.0:1 |
| Horsepower | 122.7 PS (90.2 kW; 121.0 HP) at 2,200 rpm |
| Starter | Electric |
| Oil capacity: | 14.2 L (15 US. qt, 12.5 Imp. qt.) |
| Coolant capacity: | 29.3 L (31 US. qt, 25.8 Imp. qt.) |
| Transmission and chassis | |
| Chassis | 4×2 2WD |
| Steering type | Power |
| Brakes | Band actuated disc |
| Transmission model | Power Director |
| Transmission type | Sliding gear with dry disc clutch |
| Gears | 8 forward and 2 reverse |
| Speed | Forward: 26.0 kmh (16.2 mph) Reverse: 11.0 (6.8 mph) |
| Transmission oil capacity | 64.4 L (17 US. gal, 14.2 Imp. gal.) |
| Tires | |
| Front tires | Ag: 7.50×20 |
| Rear tires | Ag: 18.4×34 |
| Three-Point Hitch | |
| Caterogy | III/II |
| Control type | – |
| Lift capacity (at ends) | – |
| PTO (Power take-off shaft) | |
| Rear PTO type | Independent |
| Rear PTO speed | 1,000 rpm |