Sharing their body styling and cab with the X9, the new four-model range of single rotor John Deere S7 combines also come with many of the X9s automatic harvesting systems.
Set to replace the current S770, S780, S785 and S790 for the 2025 harvest, the new models are powered by Stage V JDX motors. Replacing the 9.0l PowerTech PSS block in the S770, the 9-litre (JD9X) engine in the S7 700 produces a maximum power of 467hp (455hp in the S770).
Maximum power of the 13.6-litre JD14X in the S7 800, S7 850 and S7 900, of 547hp, 579hp and 625hp, respectively, is the same as the existing models, although the new block achieves its maximum power at the reduced speed of 2,000rpm.
The exterior styling of the S7 combines will be familiar to X9 operators. The new naming style indicates separator technology, model family, overall capacity, and in the future major updates of the series in each model name.
“While we’ve made very visible updates to the cab and exterior styling, the real performance, efficiency and harvest-quality improvements come from the new engines, updated residue-handling, grain-handling and loss-sensing systems, new automation options and more,” said Bergen Nelson, John Deere go-to-market manager for harvesters. “With the S7 Series, farmers can reasonably expect productivity gains of up to 20%, with 10% less fuel used.”
The residue management system is also from the X9, and the adjustable spout on the S7 unloading auger (150l/sec) is said to provide easier and more accurate trailer filling. When the grain tank (10,600l on the S7 700 and 14,100l on the others) is empty, the new cross-auger shutoff feature empties the unloading system. This reduces weight in the auger and wear on the belts.
The new grain loss sensing system detects grain loss at the rear of the cleaning shoes and the separator and is said to be up to three times more accurate than the previous system. “The loss rate is shown clearly on the in-cab display, so operators can quickly make any adjustments necessary,” said Mr Nelson.
The new cab offers more storage space, more cupholders, more heat for the feet, a more comfortable seat and more glazing. “We’ve even redesigned the cab ladder,” said Mr Nelson. “We increased its angle to make entry and exit easier, while also keeping the combine within transport width limits.”
Optional advanced harvesting automation packages include Harvest Settings Automation, which helps operators get into the field faster by automatically setting concave clearance, fan speed, rotor speed, sieve clearance and chaffer clearance, all based on the combine model, crop type and location. After the operator selects limits for grain loss, foreign material and broken grain, the system automatically adjusts the five initial settings to stay within the selected limits.
Also new to the S7 is Predictive Ground Speed Automation. This senses the crop through several different sources, including satellite biomass maps and live automation camera feedback. The S7 uses this live camera feedback to detect crop height and/or down crop to further adjust the ground speed in real-time.
Along with the operator comfort upgrades, the new machines are equipped with the new G5PLUS CommandCenter screen, integrated StarFire 7500 receiver, JDLink modem, and a new corner post display.
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