[farmboy]

Here we go. . . . Our 8010 is filling the fan with wheat. We are only cutting 40 bu wheat at 3.8 mph, top sieve 14, bottom sieve 9. Pre-sieve is closed completely. Rotor is all over the board, but we have settled on about 900. Fan is 1050. Concave is 2.

Anyone have better settings than these? Our fan is filling up with wheat every round. Not sure what else to do. Pre-sieve is where we fill the fan up in corn. But wheat, we have that thing slammed shut and we are still getting wheat in the fan.

We are also blowing out the radiator twice a day. Have checked the gap on the seal, also have the fine screen. Thanks

 

[larry]

This is exactly why we take physics in high school and complain about "when will I ever use this stuff?" Well, right now!

If the pre-sieve is completely shut, it becomes a relatively smooth platform and there is a possibility for some grain to spill forward caused by the swinging action of the sieve (gravity and motion). If a sieve is completely closed, cleaning fan air becomes restricted and flows erratically (will continue to make the grain tank undesirable). Also, there is no "back-stop" created by open sieve fingers (or teeth) to prevent slight forward motion of the grain.

It is generally not a good idea to run any sieve all the way shut while running within a normal cleaning fan RPM range as specified for corn, soybeans and wheat (unlike small seed crops like grass seed which requires a significantly lower operating range, often from a reduction kit). When air becomes restricted it becomes pressurized, causing grain to flow in/out of strange places because it [the grain] will take the path of least resistance, and that might either be out the back and on to the ground or, as in your case, possibly into the cleaning fan.

I would try opening the pre-sieve a little more to get the air flowing and slow down the rotor and/or open the concave a bit to keep from pulverizing the straw too much, which is the likely culprit causing your cleaning troubles, resulting in running the pre-sieve all the way shut.

 

[cyclonedave]

I agree with Muddy on the pre sieve unles it is the 1 5/8 corn pre-sieve. However on the second suggestion about rotor speed and concave adjustment.
Lets think about this; if I open my concaves thus pulling the rasp bars out of the crop mat, I slow the material down and I will just chew the straw up more. So to make better straw out of a rotary combine and to adhere to a cardinal rule of "Always protect your sieves" you want to speed up the crop flow until you see rotor loss.
I would like to know what sieves and modules farmboy is running?

 

[hydro100]

Be sure there is nothing blocking air flow to the presieve.

 

[redhat]

I too would like to know what pre-sieve, chaffer and shoe sieves you have in the machine as well as the modules front and rear. Settings you show I have ran in 110bu/acre wheat at the same speed with 30 ft header so I feel your first problem is likely not enough load on the sieves with too high a fan setting so you may need to "giver" so to speak, back the fan off some 100-150rpm and if you are running a 1-1/8 shoe sieve you need to open it up a little and let air to the top chaffer.

 

[jono]

Have seen something similar myself in the past and agree with redhat. You should be able to poke a lot more though the machine than that. I would sugesst openning things up a little bit and feeding her a little more crop.

Jono

 

[farmboy]

Thanks for the info. Fortunately, we got the problem fixed today. Bottom sieve was not caliberated correctly, which caused all the other problems to show up cause we thought it was good. Rule #1, check sieve spacing manually!!! Once we got the bottom sieve open we were able to open the pre sieve a bit, one notch. More than that is too much!!!. Also, the wheat we were chopping on was hail damaged so it was hard to manage. Good crops always harvest better. We are now in 70 bu wheat going 5mph. Thanks again for the info, even though we got it fixed before I read any replies.