Allis Chalmers D21 Series II

Allis Chalmers D21 Series IIThe 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 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.)
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
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