Allis Chalmers D21 Series I
The Allis Chalmers D21 Series I is a tractor produced by Allis Chalmers. It is equipped with a 426 ci 7.0 L engine. The listed engine power is Diesel (listed): 119 hp / 88.7 kW. Transmission: Power Director. Operating weight: 9500 lbs 4309 kg.
Engine Power
Diesel (listed): 119 hp / 88.7 kW
Fuel & Capacities
52 gal
196.8 L
Transmission
Power Director
Operating Weight
9500 lbs
4309 kg
Overview
 | 1963 - 1969
Model year 1963-19651965-1969
D SeriesRow-Crop tractor
D Series
Row-Crop tractor |
|---|
Production | |
|---|---|
Manufacturer | Allis Chalmers |
Row-Crop tractor | |
Built in West Allis, Wisconsin, USA | |
Total built | 1,129 |
Original price was $5,700 in 1964 | |
The D21 was the first Allis Chalmers tractor to have over 100 horsepower. The upgraded D21 II began at serial number 2201 in 1965. | |
Allis Chalmers D21 Engine | |
|---|---|
Allis Chalmers 7.0L 6-cyl diesel | |
Fuel tank | 52 gal
196.8 L |
Engine details ...  | |
Allis Chalmers D21 Transmission | |
|---|---|
8-speed sliding gear | |
Transmission details ...  |
Allis Chalmers D21 Power | |
|---|---|
Engine | 119 hp
88.7 kW |
Drawbar (claimed) | 93 hp
69.4 kW |
PTO (claimed) | 103 hp
76.8 kW |
Plows | 7 |
Drawbar (tested) | 93.09 hp
69.4 kW |
PTO (tested) | 103.06 hp
76.9 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two-wheel drive | |
Power steering | |
Band actuated disc brakes | |
Open operator station. |
Tractor hitch | |
|---|---|
Rear Type | III/II |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 1000 |
Dimensions & Tires | |
|---|---|
Wheelbase | 96.1 inches
244 cm |
Weight | 9500 lbs
4309 kg |
Front tire | 7.50x20 |
Rear tire | 18.4x34 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Charging system | Delco-Remy generator |
Charging amps | 32 |
Batteries | 2 |
4 OptOptional | |
Battery volts | 12 |
Battery AH | 95 |
References | |
|---|---|
 | |
New D21 Tractor (FE-131/637) published in 1963 | |
Operating Instructions Model D21 Tractor (TM-346A) published in 1963 |
Engine
Engine Detail — 426 ci / 7.0 L Diesel
Manufacturer | Allis Chalmers 3400 |
Fuel Type | Diesel |
Configuration | 6-cylinder, liquid-cooled |
Displacement | 426 ci
7.0 L |
Bore/Stroke | 4.25x5.00 inches
108 x 127 mm |
Power | 119 hp
88.7 kW |
Air cleaner | dry |
Compression | 16.0:1 |
Rated RPM | 2200 |
Firing order | 1-5-3-6-2-4 |
Coolant capacity | 21 qts
19.9 L |
Intake valve clearance | 0.015 inches*Hot
0.381 mm |
Exhaust valve clearance | 0.015 inches*Hot
0.381 mm |
Oil capacity | 12 qts
11.4 L |
Transmission
Transmission — Power Director
Transmission | Power Director |
Type | sliding gear |
Gears | 8 forward and 2 reverse |
Clutch | dry disc |
Oil capacity | 68 qts*No PTO or hydraulics
64.4 L |
92 qts
87.1 L | |
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. | |
With 18.4x34 rear tires. | |
 | |
Dimensions
Allis Chalmers D21 Tires | |
|---|---|
Ag front | 7.50x20 |
Ag rear | 18.4x34 |
Ag front | 11.00x16 |
Ag rear | 24.5x32 |
Dimensions | |
|---|---|
Wheelbase | 96.1 inches
244 cm |
Length | 160.6 inches
407 cm |
Width | 91.6 inches
232 cm |
Shipping weight | 9500 lbs
4309 kg |
Ballasted weight | 11700 lbs
5307 kg |
Clearance (front axle) | 21.3 inches
54 cm |
Clearance (rear axle) | 26.75 inches
67 cm |
Allis Chalmers D21 Height | |
|---|---|
Steering wheel | 90.3 inches
229 cm |
Hood | 71.75 inches
182 cm |
Exhaust | 106.6 inches
270 cm |
Tests
Nebraska Tractor Test 855 | |
|---|---|
Diesel 8-speed 2WD
October 15, 1963 - October 21, 1953
Link: Nebraska Tractor Test 855 file | |
PTO performance | |
Power at rated engine speed | 103.06 hp
76.9 kW |
Fuel use | 7.1 gal/hour
26.9 l/hour |
Drawbar performance | |
Max power | 93.09 hp
69.4 kW |
Fuel use | 7.1 gal/hour
26.9 l/hour |
Gear 4 used for power test. | |
Max pull | 14840 lbs
6731 kg |
Gear 2 used for pull test. | |
Photos
Allis Chalmers D21 Series I
Allis-Chalmers D21 Series I
Recommended Implements & Sizing Guide
Engineering recommendations for Allis Chalmers D21 Series I based on its 119 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 4 to 5 Bottom (16-18")4 - 5 铧 (40-45 cm) | Heavy Duty | Heavy primary tillage; semi-mounted hitch recommended. |
Rotary Cutter / MowerMowing & Clearing | 10 to 12 ft Flex-Wing3.0 - 3.6 m 折叠双翼 | Heavy Duty | Wide swath pasture and crop residue shredding. |
Rotary TillerSeedbed Prep | 90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机 | Commercial / Field Scale | Deep intensive seedbed preparation for commercial row crops. |
Disc HarrowSecondary Tillage | 10 to 14 ft Tandem / Offset3.0 - 4.2 m 重型交错耙 | Heavy Duty | Aggressive residue cutting in corn/cotton stubble. |
Hay BalerHay & Forage | 5x6 Round Baler or 3x3 Mid Square1.5x1.8 m 大圆捆或中型方捆机 | Heavy Duty | High density baling; requires minimum 85 PTO HP. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Allis Chalmers D21 Series I.
Estimated Continuous Field Runtime: 8.4 hrs
Approximately 8.4 hours of continuous field operation at ~75% rated power on a full tank (52 gal / 196.8 L).
Estimated 75% Load Fuel Burn~6.2 gal/hr (23.4 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Allis Chalmers D21 Series I Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Allis Chalmers D21 Series I.
Converted Equivalents:
Horsepower (HP)119 hp
Kilowatts (kW)88.7 kW
Metric Horsepower (PS / CV)120.7 PS
Direct Competitor Comparison
Compare Allis Chalmers D21 Series I against same-era industry alternatives in the same horsepower class.
Current Model
Allis Chalmers
Allis Chalmers D21 Series I
Engine Power:Diesel (listed): 119 hp / 88.7 kW
★ Baseline Reference
International HarvesterMarket Competitor
International Harvester 1046
Engine Power:108.5
Production Years:1971 - 1978
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