Row Crop tractorsSpec sheet
Allis Chalmers D21 Series II
The Allis Chalmers D21 Series II is a powerful row crop tractor made from 1965 to 1969. It has a strong 6-cylinder diesel engine that makes 121 horsepower. This engine is bigger than most other tractors, which helps it work hard in the fields. The tractor has two-wheel drive and power steering, making it easy to control. This tractor is built for serious farm work. It has a three-point hitch in the back for attaching tools. The hitch can handle big equipment, which is great for large farms. The D21 Series II also has a separate PTO that spins at 1000 rpm. This lets farmers use many different kinds of tools. The tractor is pretty heavy, weighing 9,502 pounds. It's big too, measuring over 13 feet long and almost 9 feet tall. Despite its size, it has an open operator station, so farmers can easily see around them while working.
ManufacturerAllis ChalmersPower121 hp(90.2 kW)Class100–150 HP tractors →Engine6-cylinderTransmissionSliding gear with dry disc clutch
Key specifications
- Category
- Row Crop
- Engine power
- 121hp
- Operating weight
- 9,502 lb
- Transmission
- Sliding gear with dry disc clutch
Category comparison
D21 Series II compared with its category
vs. Row Crop medianDistribution
Engine Power (hp)
All recorded Row Crop tractors
121 hp · 40th
This model
12
Median 138 hp
283
This modelRow Crop tractorsMediann = 1,206
The D21 Series II ranks at the 40th percentile for engine power among recorded row crop tractors.
Overview
About the Allis Chalmers D21 Series II
The Allis Chalmers D21 Series II is a powerful row crop tractor made from 1965 to 1969. It has a strong 6-cylinder diesel engine that makes 121 horsepower. This engine is bigger than most other tractors, which helps it work hard in the fields. The tractor has two-wheel drive and power steering, making it easy to control. This tractor is built for serious farm work. It has a three-point hitch in the back for attaching tools. The hitch can handle big equipment, which is great for large farms. The D21 Series II also has a separate PTO that spins at 1000 rpm. This lets farmers use many different kinds of tools. The tractor is pretty heavy, weighing 9,502 pounds. It's big too, measuring over 13 feet long and almost 9 feet tall. Despite its size, it has an open operator station, so farmers can easily see around them while working.
Full specifications
Recorded specifications
General
| Manufacturer | Allis Chalmers |
|---|---|
| Model | D21 Series II |
| Category | Row Crop tractor |
| Type | 4x2 2WD |
| Years built | 1965–1969 |
| Operating weight | 9,502lb(4,310 kg) |
Engine
| Make | Allis Chalmers |
|---|---|
| Model | 3500 |
| Power | 121hp(90.23 kW) |
| Cylinders | 6 |
| Displacement | 426ci(6.98 L) |
| Bore | 4.25in(107.9 mm) |
| Stroke | 5in(127 mm) |
Transmission
| Type | Sliding gear with dry disc clutch |
|---|---|
| Forward gears | 8 |
| Reverse gears | 2 |
Chassis & drive
| Chassis | 4x2 2WD |
|---|---|
| Drive | 2WD |
| Steering | Power |
| Brakes | Band actuated disc |
| Cab | Open |
Power take-off
| Rear PTO | Independent |
|---|---|
| PTO speed | 1,000rpm |
Dimensions
| Length | 160.2in(4,069 mm) |
|---|---|
| Width | 91.3in(2,319 mm) |
| Height | 106.3in(2,700 mm) |
| Operating weight | 9,502lb(4,310 kg) |
Capacities
| Cooling system | 7.75gal(29.34 L) |
|---|
Closest alternatives
D21 Series II compared with the nearest models by horsepower
Among row crop tractors, the Massey Ferguson 1135 and the International Harvester A-866 are closest to the Allis Chalmers D21 Series II in rated horsepower. The Massey Ferguson 1135 matches it on rated power and weighs 4,050 lb more, at 112 lb per horsepower against 79 lb. It entered production in 1973, 8 years after the D21 Series II. The International Harvester A-866 matches it on rated power.
| Spec | Allis Chalmers D21 Series II | Massey Ferguson 1135 | International Harvester A-866 |
|---|---|---|---|
| Engine power | 121 hp90.2 kW | 121 hp90.2 kW | 121 hp90.2 kW |
| Operating weight | 9,502 lb4,310 kg | 13,550 lb6,146 kg | - |
| Weight per hp | 79 lb/hp48 kg/kW | 112 lb/hp68 kg/kW | - |
| Displacement | 426 ci6.98 L | 354 ci5.8 L | 358 ci5.87 L |
| Cylinders | 6 | 6 | 6 |
| Transmission | Sliding gear with dry disc clutch | Two-speed power shift | Two-speed power shift |
| Drive | 2WD | 2WD | 2WD |
| Years built | 1965-1969 | 1973-1978 | - |
Calculators
Calculators for the D21 Series II
PTO power
About 100 to 109 PTO hp
Estimated from the 121 hp engine rating. The calculator also estimates drawbar power by surface.
Implement sizing
Implements a 121 hp tractor can run
Maximum size is about a 14.5 ft rotary cutter or a 12.5 ft tiller. The calculator also sizes discs, plows and balers.
Ballast
91 lb per PTO hp as listed
Heavy draft work calls for 130 to 150 lb/hp. The calculator gives the ballast to add.
Units
121 hp is 90.2 kW
The converter gives kW and metric PS values, as used on European spec sheets.
Parts and manuals
Parts and manuals for the Allis Chalmers D21 Series II
Each link opens a retailer search keyed to the fields recorded for this model. Confirm fitment against the serial plate before ordering.
Filters
- Oil filter for the Allis Chalmers 3500Amazon
Fits the Allis Chalmers 3500 6-cylinder diesel engine listed for this model. Confirm the part number against the engine serial plate.
- Air filter for the Allis Chalmers 3500Amazon
Fits the Allis Chalmers 3500 6-cylinder diesel engine listed for this model. Confirm the part number against the engine serial plate.
- Fuel filter for the Allis Chalmers 3500Amazon
Fits the Allis Chalmers 3500 6-cylinder diesel engine listed for this model. Confirm the part number against the engine serial plate.
- Hydraulic filter for the Allis Chalmers 3500Amazon
Fits the Allis Chalmers 3500 6-cylinder diesel engine listed for this model. Confirm the part number against the engine serial plate.
Manuals
- Allis Chalmers D21 Series II service and repair manualseManualOnline
Digital manuals. Built 1965 to 1969. Check the serial number range on the listing.
- Allis Chalmers D21 Series II operator's manualAmazon
Printed and reprint manuals. Built 1965 to 1969. Check the serial number range on the listing.
- Allis Chalmers D21 Series II service manualAmazon
Shop and repair manuals for this model.
Links in this section go to retailers. A purchase through them earns this site a commission at no extra cost to the buyer. As an Amazon Associate, Heavy Equipment Specs earns from qualifying purchases. Affiliate disclosure
Category medians
D21 Series II vs. Row Crop median
Allis Chalmers D21 Series II compared with other Row Crop tractors
| Spec | This model | Row Crop median | Difference | Percentile |
|---|---|---|---|---|
| Engine Power | 121 hp | 138 hp | -12% | 40th |
| Engine Displacement | 426 ci | 391 ci | +9% | 72nd |
| Cylinders | 6 | 6 | at median | 50th |
| Forward Gears | 8 | 16 | -50% | 16th |
| Operating Weight | 9,502 lb | 12,307 lb | -23% | 28th |
| Length | 160 in | 180 in | -11% | 25th |
| Width | 91.3 in | 91.2 in | 0% | 50th |
| Height | 106 in | 114 in | -6% | 27th |
Medians and percentiles are calculated from the row crop tractors in the database that have a recorded value for each specification (sample size 806–1,417 models).
Same manufacturer
Other Allis Chalmers models
Other manufacturers
Models with similar horsepower
Gallery
Allis Chalmers D21 Series II photos
FAQ
Frequently asked questions
What years was the Allis Chalmers D21 Series II manufactured?
Production of the Allis Chalmers D21 Series II ran from 1965 through 1969.
What type of transmission does the Allis Chalmers D21 Series II have?
The Allis Chalmers D21 Series II uses a Sliding gear with dry disc clutch transmission offering 8 forward gears.
What three-point hitch category does the Allis Chalmers D21 Series II use?
The Allis Chalmers D21 Series II has a Category III/II three-point hitch.
How powerful is the Allis Chalmers D21 Series II?
The Allis Chalmers D21 Series II has an engine power output of 121 hp. It is powered by a 6-cylinder engine displacing 426 ci.
What is the working weight of the Allis Chalmers D21 Series II?
The operating weight of the Allis Chalmers D21 Series II is approximately 9,502 lb.
What routine service does the Allis Chalmers D21 Series II need?
Regular maintenance for the Allis Chalmers D21 Series II includes checking and changing engine oil, hydraulic fluid, and filters, plus routine inspections as recommended in the owner's manual. Always follow the manufacturer's maintenance schedule for specific intervals and procedures.