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Tractor · 1955Unverified

International Harvester W-400

Name: International Harvester W-400
Brand: International Harvester

International Harvester W-400 · 49 hp. Reference specifications; pending source verification.

The International Harvester W-400 is a tractor with an approximate power output of 49 hp, positioning it at the lower end of its class. Manufactured between 1955 and 1956, this model features a 4-cylinder diesel liquid-cooled engine coupled with two-wheel drive and a powershift transmission. The operating weight of the W-400 ranges from 6158 to 6550 pounds. It is suitable for working on land areas of up to 200 acres.

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

Rated power

49 hp

Max power

34.2 kW

Weight

6158 to 6550 pounds

Catalogue coverage

Variants represented

Richest spec table

85 rows

Recorded power

49 hp

Transmissions

5-speed sliding gear

Production years

1955-1956

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 built2,070 (gas/LP)Reference

Total built1,118 (diesel)Reference

Original price$3,400 (1956)Reference

The International W-400 started as the International 400. In June of 1955 a decision was made to rename it the W-400, bringing the name closer to the "W" series McCormick tractors it replaced.Reference

Two-wheel driveReference

Steeringhydraulic powerReference

Mechanical disc brakesReference

Open operator station.Reference

Variants

400Row-crop version (Farmall)Reference

Engine

International Harvester 4.3L 4-cyl gasolineReference

International Harvester 4.3L 4-cyl dieselReference

International Harvester 4.3L 4-cyl LP gasReference

Fuel tank68.1 LReference

Fuel tank117.3 LReference

Drawbar (claimed)32.7 kWReference

Drawbar (tested)35.3 kWReference

Belt (tested)38.7 kWReference

International HarvesterReference

gasolineReference

4-cylinderReference

liquid-cooled vertical I-headReference

Displacement4.3 LReference

Bore/Stroke102 x 133 mmReference

Compression6.3:1Reference

Rated RPM1450Reference

Firing order1-3-4-2Reference

Starter volts6Reference

Coolant capacity25.6 LReference

dieselReference

Compression16.5:1Reference

Starter volts12Reference

Coolant capacity27.4 LReference

LP gasReference

Compression8.33:1Reference

Belt power (max)38.7 kWReference

Max power34.2 kWReference

Belt power (max)34.8 kWReference

Max power30.7 kWReference

Belt power (max)37.8 kWReference

Max power35.3 kWReference

Transmission

5-speed sliding gearReference

10-speed partial power shiftReference

ManufacturerInternational HarvesterReference

Typesliding gearReference

Gears5 forward and 1 reverseReference

TransmissionInternational Harvester Torque AmplifierReference

Typepartial power shiftReference

Gears10 forward and 2 reverseReference

The Torque Amplifier (TA) uses a planetary gearset to provide a shift between direct-drive (DD) and the TA underdrive.Reference

PTO & Hydraulics

PTO (claimed)36.2 kWReference

Rear PTOindependentReference

Rear PTO Type540Reference

Dimensions

Weight6158 to 6550 poundsReference

Front tire6.50-18Reference

Rear tire15.00-30Reference

Ag front6.50-18Reference

Ag rear15.00-30Reference

Length330 cmReference

Width193 cmReference

Height237 cmReference

Operating2793 kgReference

Operating2971 kgReference

Ballasted4741 kgReference

W-400 Serial Number Location

Serial plate on the clutch housing, left side of tractor.Reference

W-400 Serial Numbers

1954501Reference

1955510Reference

19562187Reference

Final3858Reference

FAQ: How to read a serial number table.Reference

Test results

NTTL 533: gasoline Torque Amplifier 2WDReference

NTTL 535: diesel Torque Amplifier 2WDReference

NTTL 572: LP gas Torque Amplifier 2WDReference

Gasoline Torque Amplifier 2WDMarch 28 - April 8, 1955Link: Nebraska Tractor Test 533 fileReference

Belt fuel use (max)16.7 l/hourReference

Drawbar performanceReference

Gear 3 used for power test.Reference

Max pull2885 kgReference

Gear 1 used for pull test.Reference

Diesel Torque Amplifier 2WDApril 8 - 20, 1955Link: Nebraska Tractor Test 535 fileReference

Belt fuel use (max)12.9 l/hourReference

Max pull2937 kgReference

LP gas Torque Amplifier 2WDMay 9 - 25, 1956Link: Nebraska Tractor Test 572 fileReference

Belt fuel use (max)21.6 l/hourReference

Max pull3031 kgReference

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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