John Deere T5 400 – T6 800

In the summer of 2024, John Deere introduced new T5 and T6 series axial-flow combines. The number of model options was increased to eight. The threshing system was mostly the same as before, but as standard and optional equipment, there was more technology previously introduced in the larger models. The smallest model featured a 6.8-liter engine, and the others had a 9.0-liter Stage V engine. The 9.0-liter models included automatic features familiar from larger JD models, which reduced engine speed during road travel and lowered it to a minimum of 1200 rpm at intersections. Most models could be equipped with a continuously variable transmission as an option. The largest versions of both the 5- and 6-axial-flow models had even larger grain tanks. The sieves in all models were about 10% smaller than before. As previously, behind the threshing drum were the control drum, post-threshing drum, and rear straw drum.

The cab was now the same as in the larger models, originally introduced in the X9 series, and the display was a 12.8" G5Plus. The Ultimate technology package included a new predictive ground speed automation system that aimed to adjust the combine’s speed based on factors such as terrain, the amount of biomass detected ahead by cameras, loss percentage, and engine load. The harvest settings automation included in the Premium and Ultimate packages managed the adjustments of the threshing system according to user-defined thresholds for loss, cleanliness, and broken grains. Standard equipment included HarvestDoc yield documentation, JDLink modem, AutoTrac automatic steering, and an air-suspended seat.

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