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Allis Chalmers

Allis Chalmers D21 Series I

The Allis Chalmers D21 Series I was produced from 1963 to 1969 as a row-crop tractor built in West Allis, Wisconsin, USA. It was the first Allis Chalmers tractor to exceed 100 horsepower, featuring a 7.0L 6-cylinder diesel engine producing 119 hp. The tractor has an 8-speed sliding gear transmission with Power Director, two-wheel drive, power steering, and band actuated disc brakes. It has an open operator station and a rear Type III/II hitch. The rear PTO is independent with a 1000 rpm type. The D21 Series I has a wheelbase of 96.1 inches, weighs 9500 lbs shipping weight, and features various tire options. Electrical system includes a Delco-Remy generator and 12-volt batteries. Total production was 1,129 units with an original price of $5,700 in 1964.
Power-
Founded-
ModelD21 Series I
Allis Chalmers D21 Series I tractor
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Technical Specifications

Detailed specifications and technical data for Allis Chalmers D21 Series I

Power
Plows7
Engine power119 hp (88.7 kW)
PTO (tested)103.06 hp (76.9 kW)
PTO (claimed)103 hp (76.8 kW)
Drawbar (tested)93.09 hp (69.4 kW)
Drawbar (claimed)93 hp (69.4 kW)
Engine
Typediesel
ModelAllis Chalmers 3400
Power119 hp (88.7 kW)
Coolingliquid-cooled
Cylinders6-cylinder
Fuel tank52 gal (196.8 L)
Rated RPM2200
Air cleanerdry
Bore/Stroke4.25x5.00 inches (108 x 127 mm)
Displacement426 ci (7.0 L)
Firing order1-5-3-6-2-4
Oil capacity12 qts (11.4 L)
Coolant capacity21 qts (19.9 L)
Compression ratio16.0:1
Intake valve clearance0.015 inches (0.381 mm) Hot
Exhaust valve clearance0.015 inches (0.381 mm) Hot
Electrical
Groundnegative
Batteries2 (4 Optional)
Battery AH95
Battery volts12
Charging amps32
Charging systemDelco-Remy generator
Mechanical
DriveTwo-wheel drive
BrakesBand actuated disc brakes
SteeringPower steering
Operator stationOpen operator station
Production
TypeRow-Crop tractor
NotesThe D21 was the first Allis Chalmers tractor to have over 100 horsepower. The upgraded D21 II began at serial number 2201 in 1965.
Built inWest Allis, Wisconsin, USA
Total built1,129
ManufacturerAllis Chalmers
Original price$5,700 in 1964
Years produced1963 - 1969
Transmission
TypePower Director sliding gear
Gears8 forward and 2 reverse
Clutchdry disc
ControlsRange control knob below steering wheel; gear shift lever selects one of four forward gears or reverse; tractor must be stopped and clutch used to change gears or range
Oil capacity68 qts (64.4 L) No PTO or hydraulics, 92 qts (87.1 L) with PTO/hydraulics
Tractor hitch
Rear TypeIII/II
Serial Numbers
1963100 (Series I)
19641417 (Series I)
19652079 (Series I)
19662408 (Series II)
19672863 (Series II)
19683777 (Series II)
19694498 (Series II)
LocationSerial number on the left side of the Allis-Chalmers D21, stamped into the flange near the starter mounting.
1965 Series II2130
Final Series I2129
Final Series II4609
Dimensions & Tires
Width91.6 inches (232 cm)
Length160.6 inches (407 cm)
Rear tire18.4x34, 24.5x32
Wheelbase96.1 inches (244 cm)
Front tire7.50x20, 11.00x16
Hood height71.75 inches (182 cm)
Exhaust height106.6 inches (270 cm)
Shipping weight9500 lbs (4309 kg)
Ballasted weight11700 lbs (5307 kg)
Clearance (rear axle)26.75 inches (67 cm)
Steering wheel height90.3 inches (229 cm)
Clearance (front axle)21.3 inches (54 cm)
Power Take-off (PTO)
Rear PTOindependent
Rear PTO Type1000

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