Combine Sieve Questions

I was watching a video on youtube about setting up a combine, the guy on there said to open your top sieves about 5/16" or just enough for kernels of
corn to fall through. He said to fully open up the bottom sieves, no point in running corn through a combine twice. He was working on a newer Deere
combine but said it would work for all of them. I have a Gleaner K, so is this a good idea? My bottom sieves were set about the same as the top
ones. Just wanted to check before i made a big mistake!

I think that sounds right.

We usually set the chaffer or top screen open enough to let unthreshed heads through, so they can enter the return elevator to be returned to the cylinder. The bottom screen or seive, is set narrower, just enough to let whole grain through and into the clean grain elevator and up to the bin.

Ben

This is Calmers (IL stalk roll Co) idea and it seems to work for maximum capacity. We used to take the bottom sieve out when doing high moisture corn to get maxinum air on top sieve .

that depends on what you want in the tank or on the ground, for standard seives I usally set the top about 1/2"to 9/16" the return 3/4" open to start with, the bottom around 3/8 these are only inital adjustments. check behind the machine for loss if ok your good on the top for the grain flow, you can run the top a little wide to compensate for yield increases just keep check on it for cobs and stalks breaking up and lodging in the top screen, watch your return elevator to see how much is coming back if eccessive due to high yield open the bottom a little more to prevent overloading the return or close a little to help clean the grain.

It depends a lot on what you're going to thrash. Corn and beans use a similar sieve setting . Wheat is closer on the bottom. I never measured the settings just eyeball them and adjust as works to get maximum grain in bin and least or none on the ground. About half inch to 5/8 on top then bottom about 5/16-3/8 for corn and beans is a good starting point. If the cylinder and concaves are set right it should have the cobs coming out round. This will of course vary with moisture on corn. If corn is in the 15-22 range yes if wetter then all bets are off as it will need to be set differently. Tighter cylinder concaves slower speed or more speed as needed. Wind and sieve settings will change also. Beans will not change much except for the speed according to moisture. Sieve will not change much unless you are cutting buckshot beans or basketballs. If I could open the front 6-12 inches of chaffer like the 9600 can I would open it pretty wide like almost all then set the rest of the chaffer closer. This will let the grain rain through early on the sieve so it has more time to separate before winding up at the tailings. Also gives the chaffer more time to get the grain out of the heavy trash. You stripper plate setting will affect the amount of trash going through the machine from the stalk tighter will reduce the husk and stalk looser will let more husk in.