Allis Chalmers D21
Power
119 hp
Production
1963-1969
Engine
6-cylinder
Transmission
Power Director
Weight
11700 lbs [5307 kg]
Drive
2WD
Introduction
Allis Chalmers D21 Row-Crop Tractor
The Allis Chalmers D21 is a row-crop tractor produced between 1963 and 1969 in West Allis, Wisconsin, USA. It holds historical significance as the first Allis Chalmers tractor model to exceed 100 horsepower, marking a shift toward higher-capacity agricultural machinery during the 1960s.
Engine and Performance
The tractor is powered by a 426 cubic-inch (7.0-liter) 6-cylinder liquid-cooled engine. It produces 119 horsepower (88.7 kW) at a rated speed of 2200 RPM. The engine features a 16.0:1 compression ratio and uses a dry-type air cleaner. Maintenance specifications include an oil capacity of 12 quarts (11.4 liters) and a coolant capacity of 21 quarts (19.9 liters).
Transmission and Drivetrain
The D21 utilizes a sliding gear transmission with the 'Power Director' system, providing 8 forward gears and 2 reverse gears. The system employs a dry disc clutch. Gear selection and range control are managed via a range control knob located beneath the steering wheel and a primary gear shift lever. The tractor operates in a two-wheel-drive configuration.
Hydraulics and Power Take-Off
The machine is equipped with an independent rear power take-off (PTO) operating at a standard 1000 RPM. The rear hitch is compatible with Category II and III implements, allowing for the operation of a wide range of heavy-duty agricultural equipment.
Dimensions and Chassis
With a wheelbase of 96.1 inches (244 cm) and a total length of 160.6 inches (407 cm), the D21 provides a stable platform for field work. The shipping weight is 9,500 lbs (4,309 kg), which can be increased to a ballasted weight of 11,700 lbs (5,307 kg). The tractor features power steering and band-actuated disc brakes.
Conclusion
The Allis Chalmers D21 is engineered for demanding row-crop applications where significant power and traction are required. Its historical status and mechanical robustness make it a notable machine for both heavy field operations and agricultural history enthusiasts.
Production Information of Allis Chalmers, D21
- Original price was $5,700 in 1964
- Row-Crop tractor
- The D21 was the first Allis Chalmers tractor to have over 100 horsepower. The upgraded D21 II began at serial number 2201 in 1965.
- Built in West Allis, Wisconsin, USA
| Manufacturer | Allis Chalmers |
|---|---|
| Total built | 1,129 |
Dimension and Tires Information of Allis Chalmers, D21
| Clearance (rear axle) | 26.75 inches [67 cm] |
|---|---|
| Wheelbase | 96.1 inches [244 cm] |
| Ballasted weight | 11700 lbs [5307 kg] |
| Shipping weight | 9500 lbs [4309 kg] |
| Length | 160.6 inches [407 cm] |
| Clearance (front axle) | 21.3 inches [54 cm] |
| Width | 91.6 inches [232 cm] |
| Ag front | 7.50x20 |
|---|---|
| Ag rear | 24.5x32 |
| Ag rear | 18.4x34 |
| Ag front | 11.00x16 |
Engine Specifications of Allis Chalmers, D21
- Liquid-cooled
- 6-cylinder
| Air cleaner | Dry |
|---|---|
| Firing order | 1-5-3-6-2-4 |
| Oil capacity | 12 qts [11.4 L] |
| Displacement | 426 ci [7.0 L] |
| Bore/Stroke | 4.25x5.00 inches [108 x 127 mm] |
| Power | 119 hp [88.7 kW] |
| Rated RPM | 2200 |
| Compression | 16.0:1 |
| Exhaust valve clearance | 0.015 inches [0.381 mm] |
| Intake valve clearance | 0.015 inches [0.381 mm] |
| Coolant capacity | 21 qts [19.9 L] |
Hot
Hot
Transmission Information of Allis Chalmers, D21
Transmission variants 1
- 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.
| Transmission | Power Director |
|---|---|
| Oil capacity | 68 qts [64.4 L] |
| Clutch | Dry disc |
| Type | Sliding gear |
| Type(optional) | 92 qts [87.1 L] |
| Gears | 8 forward and 2 reverse |
No PTO or hydraulics
Mechanical Specs of Allis Chalmers, D21
- Two-wheel drive
- Open operator station.
- Power steering
- Band actuated disc brakes
Power Information of Allis Chalmers, D21
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 1000 |
Three-Point Hitch of Allis Chalmers, D21
| Rear Type | III/II |
|---|
Electrical System of Allis Chalmers, D21
| Battery AH | 95 |
|---|---|
| Ground | Negative |
| Ground(optional) | 4 |
| Batteries | 2 |
| Charging system | Delco-Remy generator |
| Battery volts | 12 |
| Charging amps | 32 |
Where it sits
With 119 HP, the Allis Chalmers D21 sits between 7010 (118 HP) and HD11AG Series B (126 HP) in Allis Chalmers's range. Its power puts it in the 91th percentile of 1960s models in our database (709 machines).
Frequently asked questions
How much horsepower does the Allis Chalmers D21 have?
The Allis Chalmers D21 delivers 119 HP.
What years was the Allis Chalmers D21 produced?
The Allis Chalmers D21 was produced in 1963-1969.
What engine does the Allis Chalmers D21 have?
The Allis Chalmers D21 is powered by a 6-cylinder engine.
What transmission does the Allis Chalmers D21 use?
The Allis Chalmers D21 uses a Power Director transmission.
How much does the Allis Chalmers D21 weigh?
The Allis Chalmers D21 weighs 11700 lbs [5307 kg].
Is the Allis Chalmers D21 4WD?
The Allis Chalmers D21 is available in 2WD.