Allis Chalmers D21 Series I tractor: review and specs

The Allis Chalmers D21 Series I is a 2WD row-crop tractor from the series. This tractor was manufactured by Allis Chalmers in West Allis, Wisconsin, USA from 1963 to 1965. 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 and 8 forward and 2 reverse gears.

The Allis Chalmers D21 row-crop tractor used the Allis Chalmers 3400 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 104.4 PS (76.8 kW; 103.0 HP) at 2,200 rpm of PTO output power.

The AC D21 Series I 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 Series I
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 3400
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	104.4 PS (76.8 kW; 103.0 HP) at 2,200 rpm
Starter	Electric
Oil capacity:	11.4 L (12 US. qt, 10 Imp. qt.)
Coolant capacity:	19.9 L (21 US. qt, 17.5 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) 87.1 L (23 US. gal, 19.2 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

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