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International Harvester 100 series

9 models in this series

The 100 series from International Harvester comprises 9 models. Rated output ranges from 18.8 to 48 hp.

International Harvester 100 series (1954–1956) – the successors to the Farmall letters: Farmall 100 to 400 and W-400, the number as size class, the Torque Amplifier of 1954, petrol, LPG and the first diesels, 14 to 46 kW

Pictured: International Harvester FARMALL 100

The 100 series replaced in 1954 the Farmall letter tractors with which International Harvester had led the American market since the 1930s: the Farmall 100 followed the Super A, the 200 the Super C, the 300 the Super H and the 400 the Super M – each with more power, a new bonnet and the hydraulics IH called Hydra-Touch. The type logic: the hundreds number orders the size class in ascending order, Farmall marks the row-crop version with closely spaced front wheels, W the standard version with wide front axle (W-400), International the industrial and utility versions (100, 300, 600). The technical innovation of the range was the Torque Amplifier of 1954, a powershift step that raised pulling power under load by about 45 percent – the forerunner of all powershift transmissions. The fuels reflect the time: petrol and LPG dominate, and the Farmall 400 Diesel was one of the first diesel row-crop tractors.

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The register lists 9 versions with 13.8 to 46.3 kW, 2,011 to 5,734 cm³ with four cylinders, rated speeds of 1,400 to 1,750 rpm, torque from 199 to 553 Nm, unladen weights from 1,180 to 3,078 kg, lengths from 2,715 to 3,585 mm, widths from 1,419 to 2,305 mm and heights from 1,473 to 2,372 mm.

The 100s ran for only two years before the 30 series (130 to 450) followed in 1956 – their rarity makes them sought after by collectors, their Torque Amplifier made them the turning point of IH transmission technology.

On used tractors, originality, engine condition and carburettor, the Torque Amplifier (clutch pack), Hydra-Touch hydraulics and sheet metal count; parts are readily available in North America and through specialists in Europe.

Sources: SpecCodex register, model data: International Harvester 100er-Baureihe, International Harvester (Wikipedia)

Models compared

9 of 9 models.

	1001954–1956	3001955–1956	6001956	FARMALL 1001954–1956	FARMALL 2001954–1956	FARMALL 3001954–1956	FARMALL 4001954–1956	FARMALL 400 Diesel1954–1956	W-4001954–1956
Power	13.8 kW	24.6 kW	46.3 kW	13.8 kW	16.4 kW	24.6 kW	33.5 kW	32.7 kW	35.3 kW
Rated speed	1,400 rpm	1.750/2.000 rpm	1,500 rpm	1,400 rpm	1,650 rpm	1,750 rpm	1,450 rpm	1,450 rpm	1,450 rpm
Cylinders	4	4	4	4	4	4	4	4	4
Displacement	2,011 cm³	2,777 cm³	5,734 cm³	2,011 cm³	2,011 cm³	2,777 cm³	4,324 cm³	4,324 cm³	4,324 cm³
Torque	199 Nm	385 Nm	–	199 Nm	216 Nm	384 Nm	553 Nm	498 Nm	550 Nm
Top speed	16 km/h	27 km/h	25 km/h	17 km/h	17 km/h	25 km/h	27 km/h	27 km/h	27 km/h
Wheelbase	1,807 mm	1,905 mm	2,108 mm	1,803 mm	2,089 mm	2,343 mm	2,432 mm	2,432 mm	2,083 mm
Length	2,715 mm	2,997 mm	3,429 mm	2,718 mm	3,124 mm	3,554 mm	3,585 mm	3,585 mm	3,302 mm
Width	1,419 mm	1,657 mm	1,930 mm	1,422 mm	2,305 mm	2,108 mm	2,134 mm	2,134 mm	1,924 mm
Height	1,632 mm	1,473 mm	1,854 mm	1,651 mm	1,899 mm	1,956 mm	2,007 mm	2,007 mm	2,372 mm
Unladen weight	2,060 kg	1,542 kg	2,799 kg	1,180 kg	1,433 kg	2,132 kg	2,699 kg	3,078 kg	2,595 kg

International Harvester 100 series

International Harvester 100 series (1954–1956) – the successors to the Farmall letters: Farmall 100 to 400 and W-400, the number as size class, the Torque Amplifier of 1954, petrol, LPG and the first diesels, 14 to 46 kW

Models compared

Models

Tractor in 3D section

100

300

600

FARMALL 100

FARMALL 200

FARMALL 300

FARMALL 400

FARMALL 400 Diesel

W-400