Deere increases threshing capacity

The Dyna Flow shoe on S series Deere combines is 12 percent longer and has management controls that automatically adjust sieve and chaffer settings and fan speed, to keep a more even layer of material on the shoe during up and downhill operation.  |  John Deere illustration

WATERLOO, Iowa — John Deere’s 2016 combines didn’t get bigger when it came to horsepower, but they did get larger.

The Deere S series has received a larger cleaning sieve and a new shoe drive system.

As well, a beefier drive belt keeps the bigger grain processor running. The company says it has double the tensile strength of its predecessor and will last longer.

Kevin Ripple of John Deere told dealers that their customers could expect a 13 percent increase in canola and wheat threshing capacity.

“In crops like canola and wheat, where you can be shoe-limited, this gives farmers a big boost in performance,” he said.

“It’s like adding another one and half hours to the day without running the combine to get it.”

Deere’s Todd Verheecke said the added capacity on the 12 percent bigger cleaning sieve also reduces returns to tailings by up to 28 percent.

“No small things in small grains and oilseeds,” he said.

The width of the sieve had to remain the same, but it became 12 percent longer. Adding weight would be an issue for the design, so Deere used aluminum, which cut 160 kilograms from the previous unit’s total.

However, adding more grain does result in more weight for the processor, so stronger bearings and pulleys were installed as well as a heavier structure to carry the load.

Not every field is flat and even, so Deere put in a new system that manages the fore and aft movement of grain on the chaffer and sieve.

Grain tends to accelerate over the back end when a combine is running up a hill, which results in losses. It piles up on the front and sent to tailings when headed down a grade, which results in unnecessary reprocessing, poor samples and plugging of the return.

Jon Gilbeck, who heads up John Deere’s Harvester Works in East Moline, Illinois, said the ability to manage that puts more money in producers’ pockets.

“It decreases tailings and load on the re-thresher. (It) automatically adjusts, opening up the sieve and chaffer automatically and slowing down that fan,” he said.

“Downhill, it’s going to tighten the sieve and chaffer and speed up the fan to (improve separation and rearward movement).”

The shoe will add up to 1.5 hours in daily capacity, which will provide some sample quality and loss advantages.

“The system can reduce tailings by up to 35 percent,” he said.

“Losses can be cut by $32 to $64 per acre for those farmers who have land that rolls heavily.”

The company has also added something that a few farmers have already done themselves: an air compressor. It puts out a steady 90 pounds per sq. inch and is driven by the engine.

“Onboard air allows you to leave the material from that field and that crop behind,” Gilbeck said.

“Great for seed growers and for cleaning out during any downtime during moves.”


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