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IMT’s licensing agreement with MF ended in 1968. IMT retained the rights to tractors based on the MF 35 and 65, the 6+2 transmission, and prechamber diesels. However, what was significant was that IMT also obtained the rights to the basic structure and engine of the MF 175.

The first models based on the technology of the 175 were the 574 and its four-wheel-drive version, the 576, which appeared in the early 1970s. An improved version of it, designed for the Western market, was the four-wheel-drive model 579. In the 579, four-wheel drive was engaged automatically when slippage exceeded 5%; the driver could not engage four-wheel drive manually at all. Apparently, there were problems with this system, as later versions switched to selectable four-wheel drive. The steering wheel had tilt adjustment. Other models in the same series were the 575, 578, and 585. The differences between the models were based on rear/four-wheel drive, mechanical/hydrostatic steering, lifting capacity, and the transmission, which in some of the range was IMT’s own partially synchronized 10+2, based on their prior 6+2 design. The 578 differed from the 575 only in the use of an auxiliary cylinder in the lifting device.

In 1983, the product range was streamlined, and the rear- and four-wheel-drive 577 was introduced, with styling similar to that of the smaller new models and resembling the MF 500 series. The 577’s power had been increased by a couple of horsepower (70 DIN/77 SAE). The transmission was 10+2. In 1989, the turbocharged 585 and 590 were introduced, each with 85 horsepower. The latter had a 16+4 transmission. In the 2000s, only the 577 was available, offered in both traditional and new designs.

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Tractors

IMT 574-590

After a long period of stagnation, IMT renewed its model range in 2005. The design was made quite streamlined, and the cab, developed by the Austrian company Voestalpine, was completely new. Emission regulations forced the purchase of engines from Deutz. The transmission was the same synchronized 10+2 as in the most advanced versions of the old model range. The hydraulics were reported to be produced by the Italian company Mita. The lifting capacity was still at a modest level. The brakes were now oil-immersed discs. The turning angle of the front axle was stated as 50 degrees, but the diameter of the turning circle was not mentioned. The front axle, with its protruding hubs and small front wheels, was probably produced in-house. The price of the 2050 was one-third higher than that of the corresponding 549 model.

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IMT 2050-2090

The flagship models of IMT's lineup from 1977 until the late 1990s were chassis-steered models that closely resembled Massey Ferguson's 1500/1800 and 4000 series. Even the decals were similar. However, there was no license from MF. In the three smallest models, the 5160, 5200, and 5220, six-cylinder engines from the local truck manufacturer FAP-Famos were used, which were based on an old Mercedes-Benz license.

The 5270 and 5360 models introduced in 1983 featured Mercedes V10 and V12 engines. Later, the 5200 was also equipped with a Mercedes engine. Europe’s largest tractor, the IMT 5500, had a turbocharged Mercedes V12 producing 517 horsepower. The power ratings of the smaller chassis-steered models roughly corresponded to the latter part of their model numbers. An exception to this was the later 5220 DL, whose turbocharged FAP engine produced 280 horsepower. The transmissions in the chassis-steered models were mechanical with 9+1 gears, and the two largest models had 16+2. The chassis-steered tractors were mainly sold to state farms in the home country and neighboring countries.

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IMT 5160-5500

The large IMT tractors 5100/5106 (98 hp) and the turbocharged 5130/5136 (120 hp) were introduced in 1982. The models ending with a 6 were four-wheel drive. The engine was a 5.8-liter six-cylinder made under Perkins license. The transmission was IMT's own 10+2, and the gear levers were, as usual, in the center. Old MF technology was also found in the hydraulic dual pump, whose outputs could be combined if necessary to meet the needs of external hydraulics. The brakes were air-operated. Bosch's electric lift became an optional accessory in 2001.

Many new large models were introduced in the 1990s. The 162-horsepower 5170 was the first IMT tractor to have a differential lock on the front axle. The engine was an unsupercharged 9.6-liter V6 from Mercedes. The transmission was fully synchronized 16+4. In the 170-horsepower class, a 7.4-liter Valmet engine was also later used. A genuine Perkins engine was used in the 136-horsepower 5135 model. A late 1990s innovation is the 210-horsepower 5210, which was technically mostly comparable to the 5170 model.

According to at least GDR sources, IMT's quality was considered among the best of Eastern tractors. However, based on brochures, it seems the manufacturer's ambition was not very high. For example, the brochure used for illustration here is poor in terms of image quality and printing. Technical information is missing, even though headings for it are provided. Many brochures contain basic errors, and the English translations are subpar.

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IMT 5100-5210

In the mid-1970s, the IMT 558, based on the MF 65, was replaced by the more recently designed 560. The engine was still the old prechamber diesel. The rear axle was new, and the brakes were oil-immersed disc brakes.

Direct injection diesel was introduced in the models 565 and 569 launched in 1986. At the same time, new cabins and a new design were introduced. The transmission was either the original 6+2 or a partially synchronized 10+2. The lifting capacity was increased to 1900 kilograms. A novelty at the time was four-wheel drive, which was implemented with a side axle. The engagement of the four-wheel drive was mechanical, and there was no differential lock. The ground clearance of the four-wheel drive model was 317 mm. From the late 1990s onwards, these models were available either with the design introduced in 1986 or a newer version.

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IMT 560-569

Alongside the 533, which was based on the FE-35, IMT also manufactured the 551 in Yugoslavia, which was based on the MF 65. It was equipped with the first version of the 65’s 3.1-liter engine. Alongside it, IMT began production of the 50-horsepower 555 in 1963. The 555 was noted for having a completely new dual clutch. The power take-off gearing was still the same as the early MF 65 models, meaning that at 2000 engine RPM, the PTO shaft rotated at 720 RPM. Instead of the MF’s disc brakes, drum brakes were used. IMT’s sales program also included an extensive range of implements designed for the 555, covering everything from a corn planter to, for example, a reversible plow that was turned only 90 degrees back and forth.

The successor to the 555 was the 558, whose 3.3-liter M34T engine had 56 hp. Its appearance was still similar to the original towards the end of the 1970s.

IMT’s larger tractors were also manufactured by IMR-Rakovica, which produced engines for the main factory’s products as well. At IMT, the engine color was gray, while at IMR it was silver. The model designations were different; for example, the IMR R60 corresponded to the 558.

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IMT 551-558

In the mid-1970s, the model 540 was introduced above the IMT 533, which, like its little brother, was based on the MF 35’s technology. The engine was a 2.5-liter pre-chamber diesel made under Perkins license. The base model had 40 hp, and the Special version had 47 hp. The standard transmission was 6+2, and as an option, a 10+2 transmission was available, where the top 2 gears in each range were synchronized. Models equipped with this transmission had a reduction gear at the rear for the power take-off shaft because there was no space inside the gearbox for gears that provided the appropriate speed.

For Western export, model 547 was introduced, equipped with a direct injection Perkins engine made in England. Additionally, the 547 had larger tires and an extra valve for external hydraulics. A company named Parkanon Auto ja Puu purchased over 100 units of these models for Finland in 1980. The cabin was installed in Finland, and its manufacturer was Kurikkaferro.

In 1986, the 542 was introduced as the successor to the 540, and the 545/549 succeeded the 540 Special. These models featured a smooth bonnet design stylistically similar to the MF 500 series, and the engine in the 545/549 was a renewed direct injection diesel. The 549 had a 10+2 transmission, and the outputs of the hydraulic pumps could be combined. Hydrostatic steering was available as an option. At the end of the 1990s, newly redesigned models with improved cabins were introduced alongside the traditional ones. The 10+2 transmission became fully synchronized, and the road speed increased to 40 km/h.

In 2005, IMT signed a cooperation agreement with Deere to equip their tractors with engines meeting the new emission standards of Western markets. The smaller range included the 550, otherwise identical to the 549, equipped with Deere’s 2.9-liter three-cylinder engine (54 hp). The IMT 540 is still being manufactured under license in Pakistan.

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IMT 540-550

More from this manufacturer

The Yugoslavian Industry of Machines and Tractors (IMT) began licensed production of MF tractors with the TE20 model in 1956. In 1961, the IMT 533, based on the MF 35, entered production. The agreement with MF ended in 1968, but the manufacturing of existing models continued, and MF's influence was also visible in later models. The engines used were Perkins engines manufactured under license. The smallest models, the 528 and 530, had a version converted to 2 cylinders. At least in the Eastern European markets, IMT was known early on as ITM.

The engine of the IMT 533 was a 2.36-liter based on the Perkins P3. It had 6+2 gears, and technically in other respects corresponded to the MF 35. In 1971, the model designation added "De Luxe," whose main significance was the dual clutch. In 1980, alongside it was introduced the more powerful 539, which had a 2.5-liter M 33/T engine based on the Perkins A3.152.

IMT exports were quite extensive even to Western countries. Different safety cabins were installed in different countries. In Finland, the IMT 533/539 became known mainly from news footage showing Yugoslavs evacuating their families and belongings with IMTs equipped with rear loaders or trailers. IMT exports were interrupted from 1993 to 1998. After that, the 539 P was introduced alongside the traditionally styled models, featuring angular bodywork. It is also available with a synchronized 12+4 transmission, hydrostatic steering, and as a four-wheel drive model.

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IMT 533-539

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Acremaster

Aebi

Aecherli

Aérocentre

Agco

Agco-Allis

Agcostar

Agra Farmer

AgraCat

Agrale

Agrar

Agratrac

Agri

Agri Boss

Agri King

Agri-Power

Agria

Agricat

Agrico

Agrifarm

Agrifull

Agrinar

Agrindo

Agrip

Agrisa-Bungartz

Agrison

Agritec

Agritech

Agromash

Agroservis

Agrostroj/Agrozet

Agtor

AgTrac

AH-Goldoni

Airone

Al-Frat

Al-Ghazi

Al-Jadah

Al Jahad

Allgaier

Allgaier-Suisse

Allis-Chalmers

Alpenland

Alpina Oekonom

Altai

Amat-Calvet

Amobil

AMOG

Angad

Ansaldo

Ansaldo Fossati

Antar

Antonio Carraro

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Aprile

Arbos

Arbos Bubba

Arjun

ArmaTrac

Arnoux

Arvid

Ascot Universal

Asian Tractors

Astoa

Austin-Leyland

Austrak

Austro

Aveling-Marshall

Avenger

Avery

Avto

B.M.B President

Babiole

Baldwin

Baltiets

Balwan

Bamford

Barreiros

Basak

Bauchet

Bautz

Bean

Harkov

Vladimirets

Kirovets

YuMZ

Belarus

Bell

Benye

Beriko

Bernard

Bernardin

Bernson

Big Bud

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