8 material differences · fewer than 12

Tractor oneInternational Harvester 15861976–1981No measured PTO figureTractor twoInternational Harvester 65881978–1981No measured PTO figure

Which should you choose?

We will not advise between these two machines, because the drive differs (Two-wheel or four-wheel drive; 4WD). The figures below are side by side so you can judge them yourself; each says whether it was measured, claimed or declared by its source.

Field by field

8 material differences · 5 fields identical or within 5%, which is not counted as material

International Harvester 1586 and International Harvester 6588, field by field
Field	1586	6588	Gap
Engine
Engine power, claimed claimed	161 hp	149.9 hp	+7% 1586
Engine declared	INTERNATIONAL HARVESTER DT-436	INTERNATIONAL HARVESTER DT-466 B	differs
Displacement declared	7.14 L	7.64 L	+7% 6588
Maximum torque declared	456 lb·ft · 618 N·m	450 lb·ft · 610 N·m	—
Transmission
Top speed declared	18.6 mph · 30 km/h	18.6 mph · 30 km/h	—
Hydraulics & hitch
Pump flow declared	12.0 gpm · 45.4 L/min	18.0 gpm · 68.1 L/min	+50% 6588
Rear PTO speeds declared	1000 rpm	540/1000 rpm	differs
Weight & dimensions
Unladen weight declared	15,119 lb · 6,858 kg	17,619 lb · 7,992 kg	+17% 6588
Wheelbase declared	104.8 in · 2,662 mm	110.0 in · 2,794 mm	—
Length declared	169.0 in · 4,293 mm	228.3 in · 5,799 mm	+35% 6588
Width declared	102.0 in · 2,591 mm	101.6 in · 2,581 mm	—
Height, over the cab declared	116.0 in · 2,946 mm	115.8 in · 2,941 mm	—
Ground clearance declared	14.0 in · 356 mm	28.4 in · 721 mm	+103% 6588
Turning radius, braked declared	11.2 ft · 3.40 m	—	—
Fuel tank declared	252.0 qt · 238.5 L	360.0 qt · 340.7 L	+43% 6588

International Harvester 1586 sources

Source

Source: Traktorenlexikon, “IHC 1586”
Source: Traktorenlexikon, “IHC 1466”

International Harvester 6588 sources