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bottom sieve settings for an efficeint soybean harvest

Watch Marion’s YouTube video discussion on setting combine sieves for maximum efficiency and clean results.

Bottom Sieve Settings: Run the bottom sieve wide open to let air flow to the top sieve. 

Combine Sieve Settings for beans

From Marion: “We talked a little bit about filler plates because and concave cover plates because we want to rub these green beans out of the pods. Technically, if I can get 100% threshed on the first pass I don’t even need the bottom sieve. I could just run it wide open, let the air come on up, and the hulls are going to blow out the yellow beans or green beans are going to drop down into the clean auger, but for most of us we’re getting about a 90% thresh. We’re gonna have a few green beans and need to go back for a second pass or un-threshed ones early in the morning or late at night it’s a little tougher to get them to open up, so we’re gonna we’re going to close this down, but boy I tell you there’s nothing worse than than running the bottom sieve shut because that just closes off the air runs a lot of material on back and a lot of really nice yellow beans are going back for a second pass and there’s no upside to that at all. So try to get them all threshed try to keep it as open as possible for air flow.

COMBINE Settings & Tips
For soybeans

Click any item to watch Marion talk through the diagnostics

Start Downwind & Pick Upwind

Start harvesting on the downwind side. The wind will help spread straw away from uncut soybeans. In case of fire, the wind will blow the threat away from the standing crop. 

Bean Head Sickles

Choosing 3-inch sickle bars helps avoid plugging. The wider sickles allow residue to flow better and results in a cleaner cut in no-till or higher-residue environments.

Draper vs. Auger Fed Heads

Draper heads perform better than auger-fed platforms in all conditions. Watch the video to learn why. 

Cross Auger Adjustment

Finely tune your cross auger with a 1/16-inch clearance between the flighting and tray to reduce grain damage.

Feeder House Chain

Extend the feeder house chain so the chain is as close as possible to the auger or draper belt to improve the hand-off of material from the platform to the feeder house.

Synchronizing Reel Speed

To synchronize reel speed to ground speed, reel RPM should be 10 times ground speed. Example: 4 MPH ground speed = 40 RPM on reel. Use a piece of tape or spray paint a bar of your reel to easily count RPM from the cab.

Rotor speed refined

Increase rotor speed until the first cracked soybean appears in the grain tank, then slowdown by 10 RPM. The status of the crop will determine speed, so re-check as field conditions change.

Concave Clearance 

Open until rotor loss occurs, then close slightly. Watch the video to learn what the watch for to set properly.

concave cover plates

Improve the threshing power of green soybean pods by installing concave inserts, filler bars or filler plates in the first 12 inches of the concave. This allows for green pods to rub against green pods, significantly reducing un-threshed pods in the tank.

Fan Speed for Soybeans

Increase speed until all pod hulls have left the grain tank sample, then slow down by 50 RPM.

Bottom Sieve Settings

Run the bottom sieve wide open to let air flow to the top sieve. Sure it's there - but you're not required to use it! Watch our video to see why.

Top Sieve (Front Portion)

Close the front portion of the top sieve until the grain tank has 99% clean soybeans.

Top Sieve (Back Portion) & Tailings Elevator

Close the rear portion of the top sieve until un-threshed pods start going over the back, then open up 1/8-inch to allow them to fall into the return auger.  Check your tailings elevator using a kill stop examination to determine exactly what's happening.

Transport Vanes on Case Combine

Adjust transport vanes to the advanced position (bottom of the vanes to the front of the combine). This reduces the bleeding of horsepower and the amount of fodder and stems that fall through the rotor cage and onto the top sieve.

Soybean Harvest with a John Deere Combine

Follow along with Marion as he covers various settings for your green machine for a successful soybean harvest!  Learn some of the finer points of tuning up your combine in this extended discussion.