Combine Calibrations to Maximize Corn Yields

by Josh Zuck, Lanark, IL 

Do you want to get the best performance out of your STS or S-Series combine in corn this year and reduce shelling before it reaches the rotor?  The first thing to check is that your feeder house drum is up and the feeder house chain is on the slow speed. This will reduce shelling in the feeder house. Next is to make sure that the feed accelerator is on the slow side. One thing that helps a lot is changing out the feed accelerator paddles to a smooth paddle. Combines come from the factory with serrated paddles. Changing them out can take some time, but it is well worth it in the long run. If you still have issues at the feed accelerator, take the smooth paddles to a machine shop and put a 30 degree bend in them, bend them back, that makes them less aggressive. You just want to “shovel” the corn into the rotor.

Next, make sure the concaves are level. Leveling the concaves reduces loading to one side. To do this, you want to read your operators manual and make sure to follow it step by step.  When setting the concave clearance, take a ear and shell the corn off the cob, then take the cob and push it through the box end on a metric wrench.  If the cob doesn’t slide through a 19mm wrench, but does slide through a 20mm wrench, set the concave to 20-22mm. This will get the cob clean of corn and reduce cob damage and then keep the cob out of the grain tank. Next you want to make sure you have a spacer in the rear grates. This allows the corn, cobs, and stalks to be thrown around more to get all the loose corn out of the rotor.

Next are the chaffer and sieve. In your combine armrest display you want to go to the calibrations page and do a calibration of the chaffer and sieve. This will make sure that if you set the chaffer at 20mm it is 20mm and not 25mm. These are just a few tips and tricks for this season. If you have any questions please call the Sloan Support Call Center at 217-693-6209 and talk to one of the Sloan product support specialists.



Central IL Crop Conditions and High Moisture Settings for your Combine

by Lucas Veale, Assumption, IL 

Some much needed heat arrived this past week to help push the corn crop towards black layer. Very few reports,if any, of any crop currently at this stage sets up for a delayed harvest.  It also lends itself for a higher moisture content.  Overall the crop looks to be really good and most everyone is expecting a good crop.

Setting your combine in high moisture corn can present a challenge.  Make sure that you have your chopper in the up and disengaged position.  Second, make sure that your concave has been leveled and zeroed. Now you are ready to do a power shut down so you can see what the combine is doing or not doing. Don’t forget to evaluate how your header is performing and take that into account before making an adjustment to the combine.  As a general rule, concave position threshes and cyl speed separates. With the wet corn you will want to start at the high end of your recommended fan range listed in the crop settings section of the OM.

Our customer expo had an excellent turnout. Thanks to all of the customers who came out for the meeting and to the instructors for providing insights to help maximize your equipment.

John Deere Operations Center on has many new features added to help customers analyze and manage their data.

We have updated our help videos on They can be viewed by clicking here.  Please check those out before harvest to answer any last minute questions or to refresh your memory of all the harvest operations.


Sunrise in Assumption, IL