International Harvester A-786
The International Harvester A-786 is a tractor produced by International Harvester. It is equipped with a 310 ci 5.1 L engine. The listed engine power is Diesel (listed): 100 hp / 74.6 kW. Transmission: Torque Amplifier. Operating weight: 10350 lbs 4694 kg.
Engine Power
Diesel (listed): 100 hp / 74.6 kW
Fuel & Capacities
Diesel
Transmission
Torque Amplifier
Operating Weight
10350 lbs
4694 kg
Overview
 | 1978 - 1980
86A SeriesRow-Crop tractor
86A Series
Row-Crop tractor |
|---|
Production | |
|---|---|
Manufacturer | International Harvester |
Row-Crop tractor | |
Built in Geelong, Australia | |
Total built | 997 |
International Harvester A-786 Engine | |
|---|---|
International Harvester 5.1L 6-cyl diesel | |
Engine details ...  |
International Harvester A-786 Transmission | |
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16-speed two-speed power shift | |
Transmission details ...  |
International Harvester A-786 Power | |
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Engine | 100 hp
74.6 kW |
Drawbar (claimed) | 72 hp
53.7 kW |
PTO (claimed) | 81 hp
60.4 kW |
Mechanical | |
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Two-wheel drive | |
Final drives | bull gear |
Differential lock | electro-hydraulic rear |
Power steering | |
Hydraulic disc brakes | |
Cab standard with air-conditioning. | |
Dimensions & Tires | |
|---|---|
Wheelbase | 105 inches
266 cm |
Weight | 10350 lbs
4694 kg |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Batteries | 2 |
Battery volts | 12 |
References | |
|---|---|
 | |
International Harvester Australia: Geelong Works by Sarah Tomac* | |
International Harvester Tractors & Equipment in Australia & New Zealand by Graeme Quick | |
Technical Annual published in 1981, by Power Farming | |
*Publication contains known errors. |
Engine
Engine Detail — 310 ci / 5.1 L Diesel
Manufacturer | International Harvester D-310 |
Fuel Type | Diesel |
Configuration | 6-cylinder, liquid-cooled inline |
Displacement | 310 ci
5.1 L |
Bore/Stroke | 3.875x4.375 inches
98 x 111 mm |
Power | 100 hp
74.6 kW |
Rated RPM | 2400 |
Torque | 221 lb-ft
299.7 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 8 reverse |
Clutch | 305mm cerametallic disc |
Dimensions
International Harvester A-786 Tires |
|---|
Dimensions | |
|---|---|
Wheelbase | 105 inches
266 cm |
Length | 156 inches
396 cm |
Width | 102 inches
259 cm |
Height (cab) | 112.4 inches
285 cm |
Shipping weight | 10350 lbs
4694 kg |
Ground clearance | 14 inches
35 cm |
Recommended Implements & Sizing Guide
Engineering recommendations for International Harvester A-786 based on its 100 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 International Harvester A-786.
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-786 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for International Harvester A-786.
Converted Equivalents:
Horsepower (HP)100 hp
Kilowatts (kW)74.6 kW
Metric Horsepower (PS / CV)101.4 PS
Direct Competitor Comparison
Compare International Harvester A-786 against same-era industry alternatives in the same horsepower class.
Current Model
International Harvester
International Harvester A-786
Engine Power:Diesel (listed): 100 hp / 74.6 kW
★ Baseline Reference
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