Combines 9600 woesIJIJ

[deeredriver]

close the top sieve slightly. and if that doesnt help then try opening you concave to about 1 ,,,,if your sample is clean you maybe be over threshing

 

[Deerebines]

If your bars and concaves are like new then you should be able to run the indicator on close to the 2 mark and still easily thesh the wheat if it's dry and not tough. look at your straw. Can you see the wrinkle in the stem where the wheat was or is it all groundIJ Your chopper doesn't work that well. Back off the concave. Something else is to look on the back axle or go get on your hands and knees behind the machine. Should be ground up kernals everywhere. Heck, your grain tank should even have ground up grain with the concaves pulled that tight. I ran harvest this year with cylinder between 800 and 810. 1050 on the fan and the concave indicator ran between 2 and right under the 1 during the night when it would get tough. Back end setup like book said, actuall, top seives I had open a little wider. I wanted every kernal and a little chaff was fine. Good luck, they are a booger sometimes to fine tune. Secret is to do just one thing at a time and cut awhile to see if it did any good. Also, if you have horrible loss behind but the harvestrak isn't picking up on it, be sure to walk over and see how much is shattered on the ground in the uncut side. Some men have went to the looney bin trying to set machines that they think are pitching grain when it was a case of shattering from extreme dryness and wind.

 

[dakota]

I agree mostly with Deerebines' post. With the concave on 0 you're usually overthreshing and therefore overloading your shoe. I have done that at times to avoid walker loss or fight whitecaps. But then I turned the air way up (1200 and more) to keep the material on the shoe afloat. At 850rpm cylinder speed there is usually not many cracked kernels in the first go around. The cracked kernels occur when the bottom sieve is closed to tight. That causes a high return volume and cracks the kernels on the second go around. If you open the little returns door next to the cab you might see the returns volume. On a well set combine it should be very low. How much you're threshing you can see behind the combine. Pickup a threshed wheathead. If there is nothing left but the straw, there was more threshing then neccessary. If the chaff is completely left on the head but no kernel inside, then the threshing was just enough to get the heads clean. In very windy conditions as we find them on the high plains, I have seen chaff flying over the combine and cycloning down into the grain tank. The grain tank always looks dirtier than it really is, because the chaff and straw tends to collect at the window. The dockage on the elevator ticket is a much better indicator.

 

[Bigsky]

Are you threshing spring wheat, or winter wheatIJ Some spring wheats are very very hard to thresh, and, and you will get whitecaps in the tank, even with the concave closed, and cylinder at 900. We always had to use filler plates on our 9600 for spring wheat.

 

[HRGD]

Is your pre-cleaner open. Should be shut tight for wheat.

 

[bkandra]

I have to agree with the others. We usually run the concave fairly tight and cylinder fast in tough conditions, but in the heat of the day, it will usually be between 1.5-2 and speed from 700-750, although we have found that if we are spitting wheat out the straw chopper, the thing to do is to speed the cylinder up.

 

[bkandra]

One other thing, I usually only run the fan in the 1000-1050 range.

 

[davedan]

No one has asked questions like is the crop dry land, is the bushel weight of the wheat goodIJ How much straw are you cutting with the headIJ Are you running a chopperIJ How bout curtains on the walkersIJ How big a header are you runningIJ How fast are you trying to runIJ Ive seen before,, junky crop makes junky loads. Not to throw you off by these questions but they all have to be considered before making adjustments. I always run the precleaner open a bit despite the JD text book on harvesting,, usually 1200 fan speed like others do,, concave clearence for us usually does the work, over revved cylinder just grinds the straw and puts it on the screens not the walkers. Hopefully your concave is adjusted correctly or all this is fruitless. The slowest cyl.rpm is the best, granted you have a way to see the straw before going through a chopper. You need 8-10 inches of straw with the head to do the job right. Check for losses up front before trusting the ground at the rear, check things like feed plate to feederhouse seal contact only in the cut position, not head all the way up giving false reading. Check for holes anywhere before the cylinder from shattered grain. I have had to remove walker curtains in some dry cases to relieve shoe from over worked straw. As noted before, make one adjustment at a time, Good advise. Good luck.

 

[davedan]

Oh and One more thing, I adjust my machine every hour slightly throughout the day since the conditions from morning to night change so much. Not big changes usually just cylinder rpm and concave. What works in the morning is too much by lunch.