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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