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International Harvester 3588 vs International Harvester 6588
Verdict: International Harvester 3588 vs International Harvester 6588
The International Harvester 3588 and the International Harvester 6588 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 150 hp. International Harvester 6588 is the lighter machine (7,402 kg vs 16,520 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester 6588 is the newer design (1981 vs 1978). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.
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Fit & specs
International Harvester
85
Fit score
Best match
Clear
International Harvester
85
Fit score
Best match
Clear
Rated power
150 hp
150 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
International HarvesterReference
International HarvesterReference
With 18.4-34 tires.Reference
With 18.4-34 tires.Reference
Total built
5,643Reference
642Reference
Steering
—
articulated hydrostatic powerReference
Engine
Fuel tank
340.7 LReference
—
Drawbar (claimed)
96.9 kWReference
96.9 kWReference
Drawbar (tested)
94.1 kWReference
94.1 kWReference
Displacement
7.6 LReference
7.6 LReference
Bore/Stroke
109 x 136 mmReference
109 x 136 mmReference
Rated RPM
2400Reference
2400Reference
Idle RPM
780-2665Reference
—
Starter volts
12Reference
12Reference
Oil capacity
89.4 LReference
89.4 LReference
Coolant capacity
32.2 LReference
32.2 LReference
Power at rated engine speed
112.2 kWReference
112.2 kWReference
Max power
94.1 kWReference
94.1 kWReference
Engine
—
132.0 kWReference
Power
—
132.0 kWReference
Transmission
Transmission
Torque AmplifierReference
—
Gears
16 forward and 8 reverseReference
16 forward and 8 reverseReference
Clutch
356mm dry discReference
—
PTO & Hydraulics
PTO (claimed)
112.2 kWReference
111.9 kWReference
PTO (tested)
112.2 kWReference
112.2 kWReference
Type
two-range power shiftReference
two-range power shiftReference
Valves
2Reference
2 to 4Reference
Pump flow
45.4 lpmReference
68.1 lpmReference
Rear Type
IIIReference
III/IIReference
Rear PTO
independentReference
independentReference
Rear PTO Type
1000Reference
1000Reference
Engine RPM
1000@2100Reference
—
Power at rated PTO speed
113.4 kWReference
113.4 kWReference
Hydraulic system
—
89.3 LReference
Capacity
—
89.3 LReference
Steering flow
—
45.4 lpmReference
Dimensions
Wheelbase
279 cmReference
279 cmReference
Weight
16520 to 17620 poundsReference
7402 kgReference
Front tire
18.4-38Reference
18.4-38Reference
Rear tire
18.4-38Reference
18.4-38Reference
Ag front
18.4-38Reference
18.4-38Reference
Ag rear
18.4-38Reference
18.4-38Reference
Length
579 cmReference
579 cmReference
Width
258 cmReference
258 cmReference
Height (cab)
294 cmReference
—
Clearance (front axle)
58 cmReference
—
Clearance (rear axle)
67 cmReference
—
Front axle
82 mmReference
—
Bar rear axle
82 mmReference
82 mmReference
Shipping
7493 kgReference
—
Operating
7992 kgReference
—
Shipping weight
—
7402 kgReference
Ground clearance
—
72 cmReference
3588 Serial Numbers
1978
8801Reference
—
1979
8844Reference
—
1980
11797Reference
—
1981
13561Reference
8801Reference
Location:
Ahead of rear axle on right side.Reference
transmission housing, right sideReference
Electrical
Ground
negativeReference
negativeReference
Charging system
alternatorReference
—
Charging amps
100Reference
—
Batteries
2Reference
—
Battery volts
12Reference
12Reference
Capacities
Max capacity
9979 kgReference
—
Fuel
—
526.1 LReference
Test results
Fuel use
34.1 l/hourReference
34.1 l/hourReference
Max pull
7978 kgReference
7978 kgReference
Speeds
6588 Serial Numbers
1982
—
8966Reference
1983
—
9164Reference
1984
—
9361Reference
1985
—
9526Reference
International Harvester 6588 Height
Hood
—
202 cmReference
Cab
—
289 cmReference
Exhaust
—
318 cmReference
Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.