Dronningborg

The 6-drum D 9000 Jumbo was introduced in 1987 and was the largest drum threshing combine of its time. The threshing drum width was 168 cm and, unlike other Dronningborg models, the diameter was 60 cm. The 7.4-liter Valmet engine had a power output of either 220 or 240 hp. Working widths ranged from 556 to 677 cm, and the Jumbo could also be equipped with an extended Power Flow header using a belt conveyor.

In addition to the Unicontrol functions of the smaller models, the Jumbo featured the Daniavision computer, which provided information on work performance and yield, and included fault diagnostics and an electronic user manual that, for example, guided and recorded daily/50-hour/100-hour/annual maintenance tasks and stored settings saved for different crop types.

In 1990, a smaller 5-drum Jumbo, the D 8900, was introduced alongside it. It was mainly based on the core technology of the 8000 series combines. The threshing drum diameter on the 8900 was also 60 cm, but the width was only 140 cm.

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Combines

Dronningborg D 8900 Jumbo – D 9000 Jumbo / Case IH Dania D 8900 – D 9000

The Dronningborg D 8000 model had only minor differences compared to the D 7000 model introduced at the same time: a more powerful engine, a larger sieve, and longer coulters. In the mid-1980s, the D 8000 was replaced by the D 7200 and D 7500 models, which had roughly similar technical specifications, as well as the more powerful D 8500, which featured a larger sieve, a 170 hp Valmet engine (as opposed to the comparable MF 31), and the Unicontrol monitoring system as standard equipment. Early 1990s models included the D 8400 and D 8700. Production under the Dronningborg name ended in 1992.

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Dronningborg D 8000 – D 8700 / Case IH Dania D 8500

The Dronningborg D 7000, introduced in 1980, had a 12-14 foot cutting platform and a 105-120 hp engine. Considering these specifications, its threshing system was quite robust. The threshing cylinder width was 140 cm. The threshing system featured a replaceable cylindrical sieve and a fan-based after-cleaning mechanism that cleaned the grain before it reached the grain tank. Like other new Dronningborg models, the cab was positioned on the combine's centerline. Unlike the smaller models, the sieves were adjustable and the unloading auger joint was sealed. The speed of the threshing cylinder was hydraulically controlled.

As an optional accessory, a Power Flow cutting platform was available, which included a belt conveyor between the blade and the feed auger, improving feed consistency and making it easier to harvest tall crops. The electronic monitoring systems were more comprehensive than those on smaller models, and additionally, the D-Control system—later named Unicontrol—was available as an option. This was the most versatile combine computer of its time. The Unicontrol system displayed, among other things, the harvested surface area, threshing time, instantaneous driving speed, rotational speeds of eight axles, as well as alarms for rotational speeds and fluid levels and temperatures of the engine and hydraulics. Furthermore, the system could be expanded with a loss meter and a threshing power/yield meter.

In 1984, Dronningborg introduced new models under both the MF (Massey Ferguson) brand and its own name. The D 7200 and D 7500 models were equipped with Valmet engines—unlike the MF models—and featured larger concaves and grain tanks compared to the D 7000. In 1990, the D 7800 was introduced, and the D 7500 also grew in size, including its concaves and sieves. These models had hydrostatic transmissions, available in both two- and three-speed versions. Starting in 1987, combines were also sold in some countries under the Case IH brand. In 1990, the color of the Dronningborg models changed to a more reddish tone. From 1992 onwards, combines were produced solely under the MF brand, and the Dronningborg brand went into history.

Among the Dronningborg models imported to Finland, the D 7200 was the most popular and came standard with reverse rotation and an electric clutch for the threshing mechanism. Most of the combines also featured Unicontrol, which was a standard feature on the more powerful D 7500.

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Dronningborg D 7000 – D 7800 / Case IH Dania D 7200 – D 7500

In 1990 Dronningborg updated its models, and at the same time they began importing them into Finland. The D 3000 became the D 3600 and the D 3000 S became the D 3800. The most important difference was a larger grain tank. The color changed to a darker orange and the decorative stripes to black. The D 3600 was equipped with a mechanical drivetrain and a 3-cylinder engine, while the D 3800 had a hydrostatic drive and a 4-cylinder engine. In some countries these models were also sold in Massey Ferguson colors under the model designation 21 and 21 H.

The D 4500 had previously been available with either a 4- or 6-cylinder engine; now it was always fitted with a 6-cylinder engine. The equivalent combine in the MF lineup was the MF 24.

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Dronningborg D 3600 – D 4500 / Case IH Dania D 4500

In 1979, entirely new models, the D 3000 and D 4000, were introduced in the 9-12 foot size category. Compared to the previous mid-range models, the threshing bars and sieves were shorter, especially the 2.7-meter threshing bars of the D 3000, which were short. The D 4000 and the D 3000 S model introduced a couple of years later featured a hydrostatic drive system. The operator's seat had been moved to the centerline of the machine, but the hinge structure of the unloading auger was still open, and the auger's rotation was manually operated. The grain lifter drum was hydraulically driven, similar to Dronningborg’s design. The grain sieve was fixed or adjustable as an optional accessory, and the seed sieves were interchangeable. The combine harvester was equipped with an after-cleaning drum.

Later on, the Perkins engines were replaced with Valmet machines. MF did not manufacture combines this small, but in 1987, Dronningborg made a deal with Case IH, and the D 3000 and D 4500 were sold, for example in Germany and France, under the Case IH Dania brand. Earlier, at least in the Netherlands, the Dania brand had been used for Dronningborg, which was the name of the group owning Dronningborg and, among others, Kongskilde.

At the top of the small model range, in 1985, came the D 4500, which differed from the D 4000 by having a larger sieve and a bigger grain tank. The seed sieve was adjustable, and the unloading pipe could be hydraulically rotated, but remained open. Later, the D 4500 was also available with a 6-cylinder engine.

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Dronningborg D 3000 – D 4500 / Case IH Dania D 3000 – D 4500

In Dronningborg combines, only two threshing drum widths were used for a long time: 112 cm and 140 cm. The first model equipped with the wider version was the D-2500 introduced at the end of the 1960s, which was powered by a turbocharged six-cylinder Perkins engine. As a smaller alternative, the D-2200 was introduced in 1971, featuring a 6.1-liter Perkins engine without a turbocharger. Both models had a hydrostatic drive transmission, controlled by a hand lever. The diameters of the threshing drums were 50 cm in the smaller model and 57.5 cm in the larger one. There were also differences in the length of the threshing bars and the size of the sieves. Hydraulic unloading of the grain tank was standard.

In the mid-1970s, the updated models D-2250 and D-2600 were introduced, the latter receiving a 206-horsepower V8 Perkins engine. The maximum cutting width was 677 cm. The grain tanks were larger than before, and a factory-installed cab was available. In 1977, the D-1900 was introduced at the lower end of the range, equipped with the 140-cm threshing mechanism, with a slightly smaller threshing drum diameter once again.

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Dronningborg D-1900 – D-2600

The very old D-900, representing 1950s design, was updated in 1976 into the angular D-950. New features included, among others, hydrostatic steering, a fully adjustable seat, and a differential lock. The basic technology remained the same: the engine was located beside the driver, and the fuel tank was positioned above, on the right side of the grain tank. The top sieve was fixed size as standard, there were two gears, and the speed was controlled by a foot pedal.

In the larger models, the updates were more significant. The rear end of the combine harvester had been widened, meaning that, as with certain MF combines, the threshing elements and sieves were wider than the front end of the threshing unit. In the D-1250, the threshing elements were also longer than before, and the cutting width was increased to 10 feet. The grain tank was raised. A cab with tinted windows was also available.

Regarding the diameter of the threshing drum, 43 cm was considered sufficient, even though the first larger models had a 58 cm diameter. The use of a hydraulic unloading auger was still rare technology in a mid-range combine.

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Dronningborg D-950 – D-1650

More from this manufacturer

The first combine harvester from Dronningborg was the D-900, introduced in 1959. It remained in production for nearly 20 years and was almost until the end the most popular combine harvester in Denmark. The D-880 was a simplified version of the D-900. It featured, among other things, manual mechanical adjustment of the cutter bar height using a lever. The D-880/900 was somewhat unusual in its dimensions: the threshing drum width was 112 cm, which was very narrow compared to the 229 cm cutting width. It had 5 threshing bars (straw walkers), but they were quite short. The overall length of the combine was comparable to the smallest combines on the market. Initially, the engine was either a Leyland 50 hp gasoline engine or a 1.8-liter Perkins 4.107 (44 hp), later replaced by a 2.5-liter Perkins 4.154. There were only two gears, and the driving direction was changed with a directional reverser. The speed and length adjustments for the unloading auger were controlled from the cab. The first picture shows the 1961 model, and the latter ones the 1971 model, which featured newer paintwork.

Larger Dronningborg models had to wait until 1965, when the 10-foot D-1500 was introduced. The only feature inherited from the smaller model was the width of the threshing mechanism. The threshing drum diameter was 15 cm larger, and the straw walkers were 125 cm longer. The engine was a 78-horsepower Perkins 4.236. The bigger sibling of the D-1500, the D-1800, was introduced in 1968. It featured a 105-horsepower 6-cylinder engine and either 12-foot or 10-foot cutting widths. Later, these models were combined into the D-1600, which had a lower-powered 6-cylinder engine, longer straw walkers, but a smaller sieve and smaller threshing drum diameter.

In 1969, the mid-range model D-1200 was introduced, featuring a 70-horsepower engine and a 265 cm cutting width. The threshing drum was the same as in the smaller model, but the threshing mechanism was almost as long as in the larger models. All these Dronningborg models had a sack-loading platform alongside the grain tank. From the D-1200 onwards, hydraulic rotation and reverse rotation of the unloading auger, a differential lock, and electrical rotation speed indicators (for example, on elevators) were standard features.

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Dronningborg D-880 – D-1800

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