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| info | |
| The D21 was the first Allis Chalmers tractor to have over 100 horsepower. The upgraded D21 II began at serial number 2201 in 1965. |
| Production | |
| Manufacturer: | Allis Chalmers |
| Factory: | West Allis, Wisconsin, USA |
| Total built: | 1,129 |
| Original price (USD), $5,700 (1964 ), | |
| Capacity | |
| Fuel: | 52 gal [196.8 L] |
| 3-Point Hitch | |
| Rear Type: | III/II |
| Power Take-off (PTO) | |
| Rear PTO: | independent |
| Rear RPM: | 1000 |
| Dimensions & Tires | |
| Wheelbase: | 96.1 inches [244 cm] |
| Weight: | 9500 lbs [4309 kg] |
| Front tire: | 7.50x20 |
| Rear tire: | 18.4x34 |
| D21 Serial Numbers | |
| Location: | Serial number on the left side of the Allis-Chalmers D21, stamped into the flange near the starter mounting. |
| Allis Chalmers D21 Power | |
| Drawbar (claimed): | 93 hp [69.4 kW] |
| PTO (claimed): | 103 hp [76.8 kW] |
| Plows: | 7 |
| Drawbar (tested): | 93.09 hp [69.4 kW] |
| PTO (tested): | 103.06 hp [76.9 kW] |
| Mechanical | |
| Chassis: | 4x2 2WD |
| Steering: | power |
| Brakes: | band actuated disc |
| Cab: | Open operator station. |
| Steering flow: | 5.25 gpm [19.9 lpm] |
| Steering press.: | 1300 psi [89.6 bar] |
| Electrical | |
| Ground: | negative |
| Charging system: | Delco-Remy generator |
| Charging amps: | 32 |
| Battery | |
| Number: | 2, 4*Optional |
| Volts: | 12 |
| Amp-hours: | 95 |
| info | |
| Bore/Stroke: | 4.25x5.00 inches [108 x 127 mm] |
| Air cleaner: | dry |
| Compression: | 16.0:1 |
| Rated RPM: | 2200 |
| Firing order: | 1-5-3-6-2-4 |
| Oil capacity: | 12 qts [11.4 L] |
| Coolant capacity: | 21 qts [19.9 L] |
| Intake valve clearance: | 0.015 inches [0.381 mm] *Hot |
| Exhaust valve clearance: | 0.015 inches [0.381 mm] *Hot |
| Engine Detail | |
| Allis Chalmers 3400, diesel, 6-cylinder, liquid-cooled, 426 ci [7.0 L] |
| info | |
| Speeds: | With 18.4x34 rear tires. |
| Transmission | |
| Transmission: | Power Director |
| Type: | sliding gear |
| Gears: | 8 forward and 2 reverse |
| Clutch: | dry disc |
| Oil capacity: | 68 qts [64.4 L] *No PTO or hydraulics, 92 qts [87.1 L] |
| Transmission is controlled by means of a range control knob and a gear shift lever. The range knob is located below the steering wheel, pushing it forward puts the tractor in high range, pull it back engages low range. The gear shift selects one of four forward gears, or reverse. The tractor must be stopped and clutch used to change gears or range. | |
| Dimensions | |
| Weight (shipping): | 9500 lbs [4309 kg] |
| Weight (ballasted): | 11700 lbs [5307 kg] |
| Wheelbase: | 96.1 inches [244 cm] |
| Length: | 160.6 inches [407 cm] |
| Width: | 91.6 inches [232 cm] |
| Height (steering wheel): | 90.3 inches [229 cm] |
| Height (hood): | 71.75 inches [182 cm] |
| Height (exhaust): | 106.6 inches [270 cm] |
| Clearance (front axle): | 21.3 inches [54 cm] |
| Clearance (rear axle): | 26.75 inches [67 cm] |
| Allis Chalmers D21 Tires | |
| Ag front: | 11.00x16 |
| Ag rear: | 24.5x32 |