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International Harvester 674 (1973–1978)

Built: 1973–1978 · Series: 74 er-Serie

More machines from model year 1973

The 74er series from International Harvester includes the 674. Production: 1973–1978. The engine delivers 65 hp (47.8 kW), has 4 cylinders, with a displacement of 3,912 cm³. Rated speed is 2,400 rpm. The machine is 3,570 mm long, 1,750 mm wide and 2,190 mm high. The unladen weight is 2,316 kg. The wheelbase measures 2,146 mm. Ground clearance is 365 mm. Top speed is 25 km/h. Transmission: 8 V/4 R. The engine is water-cooled. Tyres: front 7.50-16, rear 13.6-38. The fuel is Diesel/Benzin. Construction: unit construction (no separate frame). The 74 er-Serie series covers 8 models. Rated output within it ranges from 35 to 66 hp; the 674 sits at the top of that range with 65 hp. Its immediate neighbours are the 475 below it with 59 hp and the 574 above it with 66 hp. Unladen weight within it ranges from 1,697 to 2,565 kg; here the 674 sits in the upper part of that range with 2,316 kg. 391 International Harvester models across 45 series are on record.

International Harvester 74 series (1970–1977) – the World Wide tractors from Doncaster: 354 to 674, the final digits 74 as series, the first digits as size class

The 74 series was International Harvester's mid-range for the world outside North America: presented in 1970 and built at the British Doncaster plant, which had made the small IH tractors since 1949, with sister plants in France (Saint-Dizier) and Germany (Neuss) contributing transmissions and engines. The type logic: the final digits 74 mark the series, the first digits order the size in ascending order – 354 and 374 the small models succeeding the B-275 and B-414, 444 and 474 the mid-range, 574 and 674 the big ones at about 67 and 72 hp; the 475 is the development of the 474. The engines are IH four-cylinders from Neuss and Doncaster, as diesels and – for the British and export markets – as petrol engines, of 2.3 to 3.9 litres at 1,600 to 2,400 rpm.

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The register lists 8 versions with 25.7 to 48.5 kW from four-cylinders of 2,346 to 3,914 cm³, torque from 132 to 207 Nm, unladen weights from 1,697 to 2,565 kg, lengths from 2,997 to 3,570 mm, widths from 1,621 to 1,753 mm and heights from 1,448 to 2,235 mm.

The 74s were the best-selling IH tractors of their time in Britain, Ireland, Scandinavia and the Commonwealth countries; in 1977 the 84 series followed in the same logic, with which Doncaster continued into the Case IH era.

On used tractors, operating hours, engine condition and injection pump, clutch (dual clutch for the independent PTO), gearbox and hydraulics, sheet metal and cab count; parts run through Case IH and British IH specialists.

Sources: SpecCodex register, model data: International Harvester 74er-Serie, International Harvester (Wikipedia)

Technical data

Engine

Fuel	Diesel/Benzincorrect
Power	65 hp (47.8 kW)correct
Rated speed	2,400 rpmcorrect
Cylinders	4correct
Displacement	3,912 cm³correct
Cooling	water-cooledcorrect

Dimensions and weights

Length	3,570 mmcorrect
Width	1,750 mmcorrect
Height	2,190 mmcorrect
Wheelbase	2,146 mmcorrect
Ground clearance	365 mmcorrect
Unladen weight	2,316 kgcorrect

Drivetrain and chassis

Drive	rear-wheel drivecorrect
Gearbox	8 V/4 Rcorrect
Front tyres	7.50-16correct
Rear tyres	13.6-38correct
Top speed	25 km/hcorrect

Origin and approval

Construction	unit construction (no separate frame)correct

Where this model stands

Power-to-weight ratio: 20.6 kW/t (48 kW / 2.3 t)

Power class: Universal (40–100 hp)

Stronger than 44% of the tractors in the register — out of 15,663 models with a stated power figure.

Calculated from the documented figures above — not a rating.

Frequently asked questions

How much power does the International Harvester 674 have?

The International Harvester 674 delivers 65 hp.

How much does the International Harvester 674 weigh?

The unladen weight is 2,316 kg.

What engine does the International Harvester 674 have?

4 cylinders, 3,912 cm³ displacement, Diesel/Benzin.

How fast does the International Harvester 674 go?

Top speed is 25 km/h.

What are the dimensions of the International Harvester 674?

3,570 mm × 1,750 mm × 2,190 mm.

When was the International Harvester 674 built?

Production years: 1973–1978.

What to check before buying

Check the hour meter against the service records — a replaced instrument is the most common gap.
Compare the data plate and chassis number with the papers.
Check the weights in the papers against the figures here — attachments change them.
Check front and rear tyre sizes: mismatched pairs strain the drivetrain.
Shift the gearbox cold and warm — jumps only show up at temperature.
Load the hydraulics and watch for sag.
Ask about parts availability for this build year — the running costs hang on it.

A general list for this type of machine — no substitute for an inspection or an appraiser.

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This page carries 19 individual figures for this model. They come from 2 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.

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