In the autumn of 1970, the new models from the Doncaster factory were introduced: the 3-cylinder 454 and the 4-cylinder 574. The update was so extensive that largely the same features carried through until the 1990s.

The tractor brand was now solely International, and the grille followed the new IH style. Instead of the previous pre-chamber diesels, the engines were German direct injection diesels. There were 8+4 gears, and the transmission was fully synchronized. As an option, there was a hydraulic Torque Amplifier quick-shift feature, which, however, was not imported into Finland. The gear levers were positioned on the driver's left side in the British manner. The clutch disc was 11 inches in diameter and equipped with ceramic surfaces.

The steering was hydrostatic. The disc brakes were now oil-bath type. The power take-off had a separate hydraulic clutch. The hydraulic output was 45 liters per minute. The fuel tank was located at the rear. New features also included suspended pedals. Unlike the first image’s Sekura cab and the second image’s Victor cab seen in Finland, the earliest tractors had the Siro cab and later the Turla cab.

In 1971, these tractors also began to be produced with hydrostatic power transmission. The construction was the same as in IH’s American hydro models.

In 1972, the 474 was introduced, which largely followed the 574’s technology but had only 60 hp. It was replaced in 1974 by the 475, which was equipped with a Perkins engine. In 1973, the most powerful version, the 674, was introduced. It had 72 hp and greater hydraulic output. Initially, the speed of the 674 was significantly slower than the other models, which were quite fast, but it was later increased to 33 km/h. Later models had live power take-off. In 1976, the cab was switched to Sekura.

(In the picture, the performance figures of the 574 are given in British units, torque in lbs/foot)

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