John Deere S-Series Combines (S550, S660–S690) Cleaning Guide
As part of John Deere’s continuous efforts to improve the value and performance of the S-Series Combines the following enhancements are being added to model year 2017 machines. These changes are being made to ensure the highest levels of grain quality, specifically when harvesting high-moisture corn (above 25 percent moisture). Extensive field testing confirms that much of the kernel damage in these conditions is not the result of the threshing section of the machine, but rather parts in front of the rotor or high tailings volumes.
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