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
ModelAllis Chalmers D21
Length4,070 mm (160.2 in)
Width2,320 mm (91.3 in)
Height2,700 mm (106.3 in)
Wheel base2,440 mm (96.1 in)
Weight4,310 kg (9,502 lbs)
Fuel tank capacity196.8 liters (52 US gal.; 43.3 Imp. gal)
BatteryTwo or four 12V, 95Ah
Cabin typeOpen operator station
Engine modelAllis Chalmers 3500
Engine typeFour-stroke, liquid-cooled, inline
Fuel typeDiesel
Displacement7.0 L, 6,980 cm2, (426.0 cu·in)
Bore and stroke108.0 mm X 127.0 mm (4.25 in X 5 in)
Compression ratio16.0:1
Horsepower122.7 PS (90.2 kW; 121.0 HP) at 2,200 rpm
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
Chassis4×2 2WD
Steering typePower
BrakesBand actuated disc
Transmission modelPower Director
Transmission typeSliding gear with dry disc clutch
Gears8 forward and 2 reverse
Speed Forward: 26.0 kmh (16.2 mph) Reverse: 11.0 (6.8 mph)
Transmission oil capacity64.4 L (17 US. gal, 14.2 Imp. gal.)
Front tiresAg: 7.50×20
Rear tiresAg: 18.4×34
Three-Point Hitch
Control type
Lift capacity (at ends)
PTO (Power take-off shaft)
Rear PTO typeIndependent
Rear PTO speed1,000 rpm
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