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International Harvester 3388 vs International Harvester 6388
Verdict: International Harvester 3388 vs International Harvester 6388
The International Harvester 3388 and the International Harvester 6388 are both tractors — here is how they stack up on the figures that matter. Both are rated at the same 131 hp. International Harvester 6388 is the lighter machine (7,239 kg vs 16,340 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. International Harvester 6388 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
131 hp
131 hp
Confidence
40%
40%
Guide price
—
—
Overview
Manufacturer
International HarvesterReference
International HarvesterReference
Four gears (1-4) in two ranges (low-high) with two-range power shift between direct-drive and Torque Amplifier.Reference
With 16.9-38 tires.Reference
Total built
2,146Reference
272Reference
Steering
hydrostatic powerReference
articulated hydrostatic powerReference
Engine
Fuel tank
340.7 LReference
—
Drawbar (tested)
83.3 kWReference
83.3 kWReference
Displacement
7.1 LReference
7.1 LReference
Bore/Stroke
109 x 127 mmReference
109 x 127 mmReference
Air cleaner
dual paper elementsReference
—
Rated RPM
2400Reference
2400Reference
Idle RPM
780-2645Reference
—
Starter volts
12Reference
12Reference
Oil capacity
18.9 LReference
89.4 LReference
Coolant capacity
32.2 LReference
32.2 LReference
Power at rated engine speed
97.4 kWReference
97.4 kWReference
Max power
83.3 kWReference
83.3 kWReference
Engine
—
117.1 kWReference
Drawbar (claimed)
—
85.0 kWReference
Power
—
117.1 kWReference
Transmission
Transmission
Torque AmplifierReference
—
Gears
16 forward and 8 reverseReference
16 forward and 8 reverseReference
Clutch
356mm dry discReference
—
PTO & Hydraulics
PTO (tested)
97.4 kWReference
97.4 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
540/1000Reference
540/1000Reference
Engine RPM
1000@2100Reference
—
Power at rated PTO speed
95.9 kWReference
95.9 kWReference
PTO (claimed)
—
96.9 kWReference
Hydraulic system
—
89.3 LReference
Capacity
—
89.3 LReference
Steering flow
—
45.4 lpmReference
Dimensions
Wheelbase
279 cmReference
279 cmReference
Weight
16340 to 17420 poundsReference
7239 kgReference
Front tire
16.9-38Reference
16.9-38Reference
Rear tire
16.9-38Reference
16.9-38Reference
Ag front
16.9-38Reference
16.9-38Reference
Ag rear
16.9-38Reference
16.9-38Reference
Length
576 cmReference
576 cmReference
Width
258 cmReference
258 cmReference
Height (cab)
291 cmReference
—
Clearance (front axle)
55 cmReference
—
Clearance (rear axle)
65 cmReference
—
Front axle
82 mmReference
—
Bar rear axle
82 mmReference
82 mmReference
Shipping
7411 kgReference
—
Operating
7901 kgReference
—
Ballasted
8096 kgReference
—
Shipping weight
—
7239 kgReference
Ground clearance
—
69 cmReference
3388 Serial Numbers
1978
8801Reference
—
1979
8816Reference
—
1980
10037Reference
—
1981
10714Reference
8801Reference
Location:
On the rear tractor frame, right side, near axle.Reference
transmission housing, right sideReference
Electrical
Ground
negativeReference
—
Charging system
alternatorReference
—
Charging amps
100Reference
—
Batteries
2Reference
—
Battery volts
12Reference
—
Capacities
Max capacity
9979 kgReference
—
Fuel
—
526.1 LReference
Test results
Fuel use
31.4 l/hourReference
31.4 l/hourReference
Max pull
7604 kgReference
7604 kgReference
6388 Serial Numbers
1982
—
8962Reference
1983
—
9060Reference
1984
—
9241Reference
1985
—
9361Reference
International Harvester 6388 Height
Hood
—
200 cmReference
Cab
—
287 cmReference
Exhaust
—
315 cmReference
Speeds
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.