International Harvester 1566
The International Harvester 1566 is a tractor produced by International Harvester. It is equipped with a 436 ci 7.1 L engine. The listed engine power is Diesel (listed): 183 hp / 136.5 kW. Transmission: Torque Amplifier. Operating weight: 13200 to 15195 pounds.
Engine Power
Diesel (listed): 183 hp / 136.5 kW
Fuel & Capacities
42 gal
159.0 L
Transmission
Torque Amplifier
Operating Weight
13200 to 15195 pounds
Overview
 | 1974 - 1976
66 SeriesRow-Crop tractor
66 Series
Row-Crop tractor |
|---|
Production | |
|---|---|
Manufacturer | International Harvester |
Row-Crop tractor | |
Built in Rock Island, Illinois, USA | |
Total built | 7,417 |
Original price was $26,250 in 1976 | |
International Harvester 1566 Engine | |
|---|---|
International Harvester 7.1L 6-cyl diesel | |
Fuel tank | 42 gal
159.0 L |
82 galOptOptional
310.4 L | |
Engine details ...  | |
International Harvester 1566 Transmission | |
|---|---|
12-speed two-speed power shift | |
Transmission details ...  |
International Harvester 1566 Power | |
|---|---|
Engine | 183 hp
136.5 kW |
PTO (claimed) | 160 hp
119.3 kW |
Drawbar (tested) | 137.00 hp
102.2 kW |
PTO (tested) | 161.01 hp
120.1 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two-wheel drive | |
Final drives | planetary |
Power steering | |
Hydraulic wet disc brakes | |
Open operator station. Cab available with air-conditioning. | |
Hydraulics | |
|---|---|
Type | open center |
Rear valves | 2 OptOptional |
Front valves | 2 OptOptional |
Pump flow | 12 gpm
45.4 lpm |
Tractor hitch | |
|---|---|
Rear Type | III/II |
Control | lower-link draft sensing |
Power Take-off (PTO) | |
|---|---|
Rear PTO | independent |
Rear PTO Type | 1000 |
Engine RPM | 1000@2300 |
Dimensions & Tires | |
|---|---|
Wheelbase | 105 inches
266 cm |
Weight | 13200 to 15195 pounds |
Front tire | 11L-15 |
Rear tire | 20.8-38 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Charging system | alternator |
References | |
|---|---|
 | |
Elwood Front Wheel Drive published in 1963, by International Harvester | |
Farm Equipment Reference Catalog published in 1975, by International Harvester |
Engine
Engine Detail — 436 ci / 7.1 L Diesel
Manufacturer | International Harvester DT-436 |
Configuration | turbocharged diesel, 6-cylinder, liquid-cooled |
Displacement | 436 ci
7.1 L |
Bore/Stroke | 4.30x5.00 inches
109 x 127 mm |
Power | 183 hp
136.5 kW |
Compression | 16:1 |
Rated RPM | 2600 |
Idle RPM | 900-2600 |
Oil capacity | 20 qts
18.9 L |
Coolant capacity | 26 qts
24.6 L |
Transmission
Transmission — Torque Amplifier
Transmission | Torque Amplifier |
Type | two-speed power shift |
Gears | 12 forward and 6 reverse |
With 20.8-38 rear tires. | |
 | |
Dimensions
International Harvester 1566 Tires | |
|---|---|
Ag front | 11L-15 |
Ag rear | 20.8-38 |
Dimensions | |
|---|---|
Wheelbase | 105 inches
266 cm |
Length | 168 inches
426 cm |
Width | 112 inches*Width over axle ends.
284 cm |
Height (cab) | 117 inches
297 cm |
Height (exhaust) | 125 inches
317 cm |
Clearance (drawbar) | 17 inches
43 cm |
Front tread | 62 to 86 inches
157 to 218 cm |
Front tread | 56 to 80 inches
142 to 203 cm (optional) |
Rear tread | 66 to 120 inches
167 to 304 cm |
International Harvester 1566 Weight | |
|---|---|
Shipping | 13200 lbs
5987 kg |
Operating | 15195 lbs
6892 kg |
Ballasted | 18260 lbs
8282 kg |
Tests
Nebraska Tractor Test 1174 | |
|---|---|
Diesel Torque Amplifier 2WD
May 3 - 15, 1975
Link: Nebraska Tractor Test 1174 file | |
PTO performance | |
Power at rated engine speed | 161.01 hp
120.1 kW |
Fuel use | 11.1 gal/hour
42.0 l/hour |
Power at rated PTO speed | 162.31 hp
121.0 kW |
Fuel use | 10.0 gal/hour
37.9 l/hour |
Drawbar performance | |
Max power | 137.00 hp
102.2 kW |
Fuel use | 10.9 gal/hour
41.3 l/hour |
Max pull | 15774 lbs
7155 kg |
Photos
Open station black stripe International 1566, right side.
International 1566 with cab and duals, front-left view.
Recommended Implements & Sizing Guide
Engineering recommendations for International Harvester 1566 based on its 183 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 5 to 7 Bottom (18")5 - 7 铧 (45 cm) | Commercial / Field Scale | Large acreage tillage; requires front ballast weights. |
Rotary Cutter / MowerMowing & Clearing | 15 to 20 ft Batwing4.6 - 6.1 m 宽幅折叠翼 | Commercial / Field Scale | Large commercial field and roadside mowing operations. |
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 | Large Square Baler (3x4 or 4x4)大方捆商用打捆机 (1.2x1.2 m) | Commercial / Field Scale | High-capacity commercial forage harvesting (1000 RPM PTO). |
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 1566.
Estimated Continuous Field Runtime: 4.4 hrs
Approximately 4.4 hours of continuous field operation at ~75% rated power on a full tank (42 gal / 159 L).
Estimated 75% Load Fuel Burn~9.5 gal/hr (36 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 1566 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for International Harvester 1566.
Converted Equivalents:
Horsepower (HP)183 hp
Kilowatts (kW)136.5 kW
Metric Horsepower (PS / CV)185.5 PS
Direct Competitor Comparison
Compare International Harvester 1566 against same-era industry alternatives in the same horsepower class.
Current Model
International Harvester
International Harvester 1566
Engine Power:Diesel (listed): 183 hp / 136.5 kW
★ Baseline Reference
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