International Harvester A-866
The International Harvester A-866 is a tractor produced by International Harvester. It is equipped with a 358 ci 5.9 L engine. The listed engine power is Diesel (listed): 121 hp / 90.2 kW. Transmission: Torque Amplifier. Operating weight: 10803 lbs 4900 kg.
Engine Power
Diesel (listed): 121 hp / 90.2 kW
Fuel & Capacities
42 gal
159.0 L
Transmission
Torque Amplifier
Operating Weight
10803 lbs
4900 kg
Overview
 | 1973 - 1978
66A SeriesRow-Crop tractor
66A Series
Row-Crop tractor |
|---|
Production | |
|---|---|
Manufacturer | International Harvester |
Row-Crop tractor | |
Built in Geelong, Australia | |
International Harvester A-866 Engine | |
|---|---|
International Harvester 5.9L 6-cyl diesel | |
Fuel tank | 42 gal
159.0 L |
Engine details ...  | |
International Harvester A-866 Transmission | |
|---|---|
16-speed two-speed power shift | |
Transmission details ...  |
International Harvester A-866 Power | |
|---|---|
Engine | 121 hp
90.2 kW |
Drawbar (claimed) | 87 hp
64.9 kW |
PTO (claimed) | 90 hp
67.1 kW |
Mechanical | |
|---|---|
Two-wheel drive | |
Final drives | bull gear |
Power steering | |
Hydraulic disc brakes | |
Open operator station. Cab optional. | |
Hydraulics | |
|---|---|
Type | open center |
Tractor hitch | |
|---|---|
Rear Type | II |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 540/1000 (1.375) |
Engine RPM | 540@2300 |
1000@2300 | |
Dimensions & Tires | |
|---|---|
Wheelbase | 104.7 inches
265 cm |
Weight | 10803 lbs
4900 kg |
Front tire | 11.00-16 |
Rear tire | 23.1-34 |
Full dimensions and tires ...  | |
References | |
|---|---|
 | |
International Harvester Australia: Geelong Works by Sarah Tomac* | |
International Harvester Tractors & Equipment in Australia & New Zealand by Graeme Quick | |
Technical Annual published in 1977, by Power Farming | |
*Publication contains known errors. |
Engine
Engine Detail — 358 ci / 5.9 L Diesel
Manufacturer | International Harvester D-358 |
Fuel Type | Diesel |
Configuration | 6-cylinder, liquid-cooled inline |
Displacement | 358 ci
5.9 L |
Bore/Stroke | 3.875x5.0625 inches
98 x 129 mm |
Power | 121 hp
90.2 kW |
Fuel system | direct injection |
Compression | 16:1 |
Rated RPM | 2500 |
Torque | 265 lb-ft
359.3 Nm |
Torque RPM | 1600 |
Starter | electric |
Starter volts | 12 |
Transmission
Transmission — Torque Amplifier
Transmission | Torque Amplifier |
Type | two-speed power shift |
Gears | 16 forward and 4 reverse |
Dimensions
International Harvester A-866 Tires | |
|---|---|
Ag front | 11.00-16 |
Ag rear | 23.1-34 |
Ag rear | 23.1-30 |
18.4-34 | |
18.4-38 | |
Dimensions | |
|---|---|
Wheelbase | 104.7 inches
265 cm |
Length | 159.8 inches
405 cm |
Width | 90.9 inches
230 cm |
Height (steering wheel) | 87 inches
220 cm |
Weight | 10803 lbs
4900 kg |
Front tread | 59.8 to 83.9 inches
151 to 213 cm |
Rear tread | 68.1 to 105.9 inches
172 to 268 cm |
Photos
International Harvester A-866
Recommended Implements & Sizing Guide
Engineering recommendations for International Harvester A-866 based on its 121 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 | 15 to 22 ft Folding Disc4.5 - 6.7 m 折叠式圆盘耙 | Commercial / Field Scale | Wide commercial field leveling; requires hydraulic remotes. |
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 International Harvester A-866.
Estimated Continuous Field Runtime: 6.7 hrs
Approximately 6.7 hours of continuous field operation at ~75% rated power on a full tank (42 gal / 159 L).
Estimated 75% Load Fuel Burn~6.3 gal/hr (23.8 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
International Harvester A-866 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for International Harvester A-866.
Converted Equivalents:
Horsepower (HP)121 hp
Kilowatts (kW)90.2 kW
Metric Horsepower (PS / CV)122.7 PS
Direct Competitor Comparison
Compare International Harvester A-866 against same-era industry alternatives in the same horsepower class.
Current Model
International Harvester
International Harvester A-866
Engine Power:Diesel (listed): 121 hp / 90.2 kW
★ Baseline Reference
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