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Tractor · 1981Unverified

International Harvester 6388

Name: International Harvester 6388
Brand: International Harvester

International Harvester 6388 — 60 2+2 Series · 131 hp. Reference specifications; pending source verification.

The International Harvester 6388 is a tractor model rated at 131 hp, positioning it at the high-power end of its class. Produced between 1981 and 1984, this model features a 6-cylinder turbocharged diesel liquid-cooled engine and four-wheel drive with a hydrostatic transmission. Its operating weight is listed at 7239 kg, making it suitable for operations covering 200–800 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

131 hp

Max power

83.3 kW

Weight

7239 kg

Catalogue coverage

Variants represented

Richest spec table

73 rows

Recorded power

131 hp

Recorded weight

7239 kg

Transmissions

16-speed two-range power shift

Production years

1981-1984

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerInternational HarvesterReference

Total built272Reference

Original price was $61,400 in 1984Reference

Four-wheel driveReference

Steeringarticulated hydrostatic powerReference

Cab standard with burgundy finish, heat, and A/C. Optional western finish interior.Reference

Engine

International Harvester 7.1L 6-cyl dieselReference

Engine117.1 kWReference

Drawbar (claimed)85.0 kWReference

Drawbar (tested)83.3 kWReference

International Harvester DT 436BReference

turbocharged dieselReference

6-cylinderReference

liquid-cooledReference

Displacement7.1 LReference

Bore/Stroke109 x 127 mmReference

Power117.1 kWReference

Rated RPM2400Reference

Starter volts12Reference

Oil capacity18.9 LReference

Coolant capacity32.2 LReference

Power at rated engine speed97.4 kWReference

Max power83.3 kWReference

Transmission

16-speed two-range power shiftReference

Typetwo-range power shiftReference

Gears16 forward and 8 reverseReference

Oil capacity89.4 LReference

Left lever selects high, low, or reverse range. Right lever selects gear. On-the-move powershift without the clutch between gear pairs 1/2, 3/4, 5/6, and 7/8. Synchronized shift (with the clutch) from 2-to-3, 4-to-5, and 6-to-7.Reference

PTO & Hydraulics

PTO (claimed)96.9 kWReference

PTO (tested)97.4 kWReference

Hydraulic system89.3 LReference

Typeclosed centerReference

Capacity89.3 LReference

Valves2 to 4Reference

Pump flow68.1 lpmReference

Steering flow45.4 lpmReference

Rear TypeIII/IIReference

Rear PTOindependentReference

Rear PTO Type540/1000Reference

Power at rated PTO speed95.9 kWReference

Capacities

Fuel336.9 LReference

Fuel526.1 LReference

Dimensions

Wheelbase279 cmReference

Weight7239 kgReference

Front tire16.9-38Reference

Rear tire16.9-38Reference

Ag front16.9-38Reference

Ag rear16.9-38Reference

Length576 cmReference

Width258 cmReference

Shipping weight7239 kgReference

Ground clearance69 cmReference

Bar rear axle82 mmReference

6388 Serial Numbers

Location:transmission housing, right sideReference

19818801Reference

19828962Reference

19839060Reference

19849241Reference

19859361Reference

FAQ: How to read a serial number table.Reference

International Harvester 6388 Height

Hood200 cmReference

Cab287 cmReference

Exhaust315 cmReference

Test results

Diesel 16-speed 4WDAugust 21 - 27, 1979Link: Nebraska Tractor Test 1319 fileReference

PTO performanceReference

Fuel use31.8 l/hourReference

Fuel use28.8 l/hourReference

Drawbar performanceReference

Fuel use31.4 l/hourReference

Gear 4-Lo-DD used for power test.Reference

Max pull7604 kgReference

Gear 1-Lo-DD used for pull test.Reference

Speeds

With 16.9-38 tires.Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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