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 rated power output is 183 hp 136.5 kW. Transmission: Torque Amplifier. Operating weight: 13200 to 15195 pounds.

Overview

	1974 - 1976 66 SeriesRow-Crop tractor
1974 - 1976
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.