9500 with 643 help please

Mitch D

Member

First day of corn this year and boy it sure wasn't as fun as it should have been. Leaving a lot of corn in the field, mostly shelled but some on the cob here and there. Got it adjusted so cobs are clean but still shelled coming out. Mostly thru the chopper, so looked in at the walkers and wow there is a lot of stalk in there. After running some more and watching it I would say some of my problem is that the head is pulling in the top half of the stalk on well over half of the plants. Is this something that can be fixed or is it all just the way the corn is? Thanks guys Mitch
 
(quoted from post at 18:00:16 11/04/14)
First day of corn this year and boy it sure wasn't as fun as it should have been. Leaving a lot of corn in the field, mostly shelled but some on the cob here and there. Got it adjusted so cobs are clean but still shelled coming out. Mostly thru the chopper, so looked in at the walkers and wow there is a lot of stalk in there. After running some more and watching it I would say some of my problem is that the head is pulling in the top half of the stalk on well over half of the plants. Is this something that can be fixed or is it all just the way the corn is? Thanks guys Mitch

I hear you loud and clear
In my part of Illinois i ran most of the plant through the combine
Tried everything from opening deck plates to speeding up the head
Nothing helped and just had to go slow and give it time to separate it out
Good luck
Dugger
 
I think it is mostly tied to plant size from either population of planting, genetics, and weather .... just the nature of tring to figure out what to do ....slow down and get er done
 
Maybe check that the curtain has not come out and been "processed" by the chopper. The curtain drops the stalk onto the front of the walkers so they have to travel their full length......just a thought
 
First of all, what cylinder speed are you running? The "book" settings are abysmally off on these combines. You are underthreshing which causes grain to go over the walkers. Also, what speed are you running your corn head? And what is the deck plate spacing? Let us know these things and we can help you. My guess is you are running your cylinder way too slow and the corn head as well, or possibly driving faster than the corn head is set up to run. Mike
 
Mike, I would love to hear your take on things, cylinder is around 370, Head is as fast as the combine goes (that sensor on head drive is gone) tried slow and that didn't seem to change it. As far as ground speed past years are in the 3.5-4 range but today was around 2.5. Deck plates I will have to check
 
First, Mike is an authority on this stuff... he probably should re-write the manual for these machines. I'd buy one if he did.

Second- what kind of shape are the corn head rolls in, are they worn bad and not pulling the stuff through?
 
They don't look that bad but its not like I have a new one for comparison, I'm sure they are original so they prolly are worn a lot. Was thinking about welding up the rolls on one or two rows for comparison.
 
If it's triple stack gmo corn dang stocks are like bamboo. Raise the head up to just under the ears, speed the cylinder up. Is the harvest track gauge pegged over to the right? If so to much stalk in the machine. Gmo stocks have got to be ripe, you might have to wait on a solid freeze.
 
If your rolls are worn you can get a lot of trash in the head. Odds are, as dry and hard as the stalks are this fall you may not be able to do much about that. However, you can speed up your corn head even more than you might think. The chain drives have a small drive sprocket and a larger driven sprocket. You can put both small sprockets on one side and both large ones on the other and drive your corn head one-to-one. This can be helpful in tough conditions and in good conditions you can slow the feederhouse without slowing your corn head as much, saving wear on the feederhouse chain. Depending on the moisture, 370 rpm cylinder speed sounds a little low, especially since you have so much more trash to wallow through. Speed up your cylinder to around 420 and go UP if necessary. If you have too much corn on the walkers you are not threshing enough, plain and simple. A kernel of corn left on the cob at times is not a bad thing but if it is often you need to speed up your cylinder some. Try that and let us know how it goes. Mike
 
The Deck plates are about 1 inch and rolls overlap about halfway up. I will try the faster cylinder today when I go out and see what that does and get back to you.
 
One inch is pretty narrow for your deck plates. This can cause extra material to enter the combine. Try opening them up an eighth inch or so and see how you get along. In drought years when the stalks are small diameter the inch setting may be appropriate. But in a heavy crop like this one you likely need wider spacing on the deck plates. Even up to an inch and a quarter might be appropriate. Remember to set the bottom an eighth inch closer than the top. All the measurements I mentioned are taken at the bottom. Mike
 
Ran yesterday with the cylinder at 430 and that helped a lot, changed fields and the stalk problem got worse but then in the 2nd field it was way better. Still plan on trying to widen the deck plates.
 
Opened up half the plates to 1 1/8 on the bottom and 1 1/4 top and that did seem to help some. Depends more on the spot in the field I guess.
 
The corn is "funny" this year here as well. Having a terrible time getting it all off the cob without alot of broken kernels. last year I didn't have a load over 1.5% damage. This year I am seeing much, much, more.

Then there is the stalks, one variety like to break off and go for the ride through the combine.
 

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