International Harvester 1568 tractor specifications

1974 - 1976

1974 - 1976 66 SeriesRow-Crop tractor

Series:

Series:1566 ← 1568

1974 - 1976

66 Series

Row-Crop tractor

Series:

Series:	1468 ←	1566	→ 1568
		1586 ↓

Production

Production
Manufacturer:	International Harvester
Type:	Row-Crop tractor
Total built:	7,417
Original price:	$26,250 (1976)

International Harvester 1566 Power

International Harvester 1566 Power
Drawbar (claimed):	140 hp 104.4 kW
PTO (claimed):	161 hp 120.1 kW

International Harvester 1566 Engine

International Harvester 1566 Engine
International Harvester 7.1L 6-cyl diesel
Fuel tank:	42 gal 159.0 L
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
Cab:	standard
Transmission:	12-speed
Transmission details ...

Hydraulics

Hydraulics
Type:	open center
Valves:	1
Pump flow:	12 gpm 45.4 lpm

Tractor hitch

Tractor hitch
Rear Type:	3/2

Power Take-off (PTO)

Power Take-off (PTO)
Rear PTO:	independent
Rear RPM:	1000

Dimensions & Tires

Dimensions & Tires
Wheelbase:	105 inches 266 cm
Weight:	12,870 lbs 5837 kg
Front tire:	11L-15
Rear tire:	20.8-38
Full dimensions and tires ...

1566 Serial Numbers

1566 Serial Numbers
Location:	Clutch housing on left side
1974:	7101
1975:	7837
1976:	12589
how to read serial numbers...

Production

Production Manufacturer:International Harvester
Type:Row-Crop tractor
Total built:862
Original price:$26,980 (1976)
The 1568 was a 1566 with a International V8 truck engine.

International Harvester 1568 Power

International Harvester 1568 Power Drawbar (tested):130.17 hp
97.1 kW
PTO (tested):150.70 hp
112.4 kW
power test details ...

1974 - 1976

66 Series

Row-Crop tractor

Series:

1566 ←

1568

Nebraska Tractor Test 1175

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.

International Harvester 1568 Engine

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

1974 - 1976

66 Series

Row-Crop tractor

Series:

1566 ←

1568

Engine Detail

Engine Detail
International DV-550
diesel
8-cylinder
liquid-cooled V-8
Displacement:	548.7 ci 9.0 L
Bore/Stroke:	4.312x4.50 inches 110 x 114 mm
Air cleaner:	two-stage dry with unloader
Compression:	16.6:1
Rated RPM:	2600
Starter volts:	12
Coolant capacity:	30 qts 28.4 L

Mechanical

Mechanical Chassis:4x2 2WD
Steering:hydrostatic power
Brakes:hydraulic wet disc
Cab:Cab standard
Transmission:12-speed partial power shift
Transmission details ...