International Harvester 1568

The International Harvester 1568 is a tractor produced by International Harvester. It is equipped with a 548.7 ci 9.0 L engine. The rated power output is 172 hp 128.3 kW. Transmission: Torque Amplifier. Operating weight: 12,960 lbs 5878 kg.

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	862
Original price was $26,980 in 1976
The 1568 was a 1566 with a International V8 truck engine.

International Harvester 1568 Engine
International 9.0L 8-cyl diesel
Fuel tank	42 gal 159.0 L
Engine details ...

International Harvester 1568 Transmission
12-speed two-speed power shift
Transmission details ...

International Harvester 1568 Power
Engine (gross)	172 hp 128.3 kW
PTO (claimed)	150 hp 111.9 kW
Drawbar (tested)	130.17 hp 97.1 kW
PTO (tested)	150.70 hp 112.4 kW
Performance test details ...

Mechanical
Two-wheel drive
Final drives	planetary
Power steering
Hydraulic wet disc brakes
Cab standard with air-conditioning.

Hydraulics
Type	open center
Rear valves	1 or 2
Front valves	2 OptOptional
Pump flow	12 gpm 45.4 lpm
Total flow	21 gpm 79.5 lpm

Tractor hitch
Rear Type	III/II
Control	draft control

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	1000 (1.375)
Engine RPM	1000@2300

Dimensions & Tires
Wheelbase	105 inches 266 cm
Weight	12,960 lbs 5878 kg
Front tire	11L-15
Rear tire	20.8-38
Full dimensions and tires ...

Links
IH V-8 Tractor Engines: article on the V8s from TractorShop.com

Electrical
Charging system	alternator
Battery volts	6

References
Farm Equipment Reference Catalog published in 1973, by International Harvester
Farm Equipment Reference Catalog published in 1975, by International Harvester

Engine

Engine Detail — 548.7 ci / 9.0 L Diesel

Manufacturer	International DV-550
Fuel Type	Diesel
Configuration	8-cylinder, liquid-cooled V-8
Displacement	548.7 ci 9.0 L
Bore/Stroke	4.312x4.50 inches 110 x 114 mm
Power (gross)	172 hp 128.3 kW
Air cleaner	two-stage dry with unloader
Compression	16.6:1
Rated RPM	2600
Idle RPM	900-2600
Starter volts	12
Oil capacity	16 qts 15.1 L
Coolant capacity	30 qts 28.4 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 1568 Tires
Ag front	11L-15
Ag rear	20.8-38

Dimensions
Wheelbase	105 inches 266 cm
Length	168 inches 426 cm
Height (cab)	117 inches 297 cm
Height (exhaust)	128 inches 325 cm
Weight	12,960 lbs 5878 kg
Clearance (drawbar)	17 inches 43 cm
Front tread	52 to 86 inches 132 to 218 cm
Front tread	56 to 80 inches 142 to 203 cm
Rear tread	66 to 120 inches 167 to 304 cm

Tests

Nebraska Tractor Test 1175
Diesel 12-speed 2WD May 3 - 15, 1975 Link: Nebraska Tractor Test 1175 file
PTO performance
Power at rated engine speed	150.70 hp 112.4 kW
Fuel use	10.1 gal/hour 38.2 l/hour
Power at rated PTO speed	147.79 hp 110.2 kW
Fuel use	9.9 gal/hour 37.5 l/hour
Drawbar performance
Max power	130.17 hp 97.1 kW
Fuel use	13.0 gal/hour 49.2 l/hour
Gear 1-Hi-TA used for power test.

Photos

International Harvester 1568 tractor photo