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Discussion Starter · #1 ·
Helping a buddy...Spring wheat 50bu but harder than most years to thrash

He has been having close to 3 percent unthrashed wheat in hopper, :mad:have tried all sorts of rotor concave clearance, rotor speed, top and bottom sieve adjustments with no success, dealer is no help and getting frustrated, rethrasher is over working and causing alarms and plugging when bottom sieve to closed, or top to open...having to run fan up to 1100rpm to stay moving, but going out the back, tried putting veins to slow and still not helping

Reduced speed seams to be the only way to be acceptable:mad: combine loses are also on higher side.... Dealer advises to raise rear of combine to highest setting

I run the axial flow and we needed to put veins to slow and concave tight and rotor fast, been working good with minimal loses and capacity 30 percent better, but no luck when doing this to the Deere

It seams like he has much more capacity and is limited to these issues, it like the rotor is not doing a proper thrash and then rethrasher can't keep up:mad::mad:

What have others used for settings or found to work best in this situation...engine load is 70 percent, header is 45', owner is very upset with the machines to date, and will be sold soon if things don't get better
 

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Not sure if there the same..But for our 9870 the dealer said to put small wire in the first and second concave..or we run small wire in #1 and wide in #2 and #3, but use cover plates in 1,2,3,5,and 6 slots..Very little white caps this yr..Concave set on #10 and rotor speed @ 1000 rpm...
 

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Yeah, you know I find that hard to believe.....more like nearly impposible if my personal experience is worth anything (and to many of you, clearly it's not.....)

Does the machine have the dual zone rear chaffer? What year is the machine? Has the concave been leveled by YOU properly? Feed accelerator in low or high? No filler straps being used in the concaves? VariableStream rotor or TriStream? Of course the fan is going to have to be at 1100, unless you have horrible test weight that would be a totally normal setting in high volume. I've spend most of the summer at 1150 with my fan.

Yes I agree. If the tailings to the Active Tailings (re-thrasher) are actually un-threshed heads instead of clean grain then the rotor isn't doing its job. So therefore I suspect the concaves are not zeroed and levelled properly to the rotor and not doing what it needs to do. Don't expect the re-thresher to do wonders. The rotor still needs to do it's proper job. The re-thresher just handles the returns different than returning to rotor. Not necessarily better. Both methods do the same which is Re-Thresh the tailings and then throw back onto the chaffer.
 

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Discussion Starter · #7 ·
Combines less than a month old, both pdi at jaydee, and similar issues, both very loaded machines

Latest rotor, vein adjustment from cab, not sure on dual zone chafer, latest style rotor, would think feed acc in hi, and dealer tried filler, crop weight 61lbs,

As for fan that seams dam hi, my 9230 at 820rpm and looks clean... Dealer stumped... Fields he's combine look like a good seeding job after the rains
 

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Good luck figureing it out bussard. I raise a fair amount of Lillian. Hard thrashing stuff. A case 7230 has been my best answer so far. I have seen gleaners do a good job in it also.
These Iowa boys don't believe how much tailings run in our wheat. Very common problem in my area. Good luck, let us know if you figure it out.

BTW, running the 7230 at 850 fan rpm also and clean as I seen Lillian be. Made Vida and Stettlar look excellent. Even my 9650 walker isn't running very fast fan speeds this year.
 

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Run the feeder chain and feed accelerator on slow. Level the concave. If it's not level no other adjustments will get it threshing HRS wheat. Neepawa taught us how to set a concave. You have a rethresher so cover all six front concave slots. Calibrate the sieves. Use a variety of bolts for gauges if you don't have John Deere's sieve gauge handy.

This is pretty well what John Deere says.
Improving Threshing Performance in Hard Threshing / White Cap Wheat Conditions
 

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Hey Fred-Have him get rid of all the JD internal parts. Go to Precision Farm Parts and order up a set of threshing elements, Extra Narrow concaves and a discharge speed up kit. Run the extra narrow concaves on the front two positions, large wire or a small wire with every other wire removed in the rear position. No need for any concave covers, remove all the separator grate covers on the rear of the rotor.

I run my concave on 24. Speed right at 900 and fan speed right at 900. Top sieve at 16 and bottom sieve at 7. I cut 70-80 bushel spring wheat today with these settings with a 35 foot draper. Getting right around 1500 bu/hr through the machine. Very few white caps and dockage at 1%. I have cut the hardest known threshing wheat, Glenn, with this set-up and all I had to do was close the concave down to 18.
 

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Maybe time to talk to breeeders and tell them to take a look at this.
This year have some splendor ,unity and carberry and if they are all the same I will grow carberry 100% it threshses by far the best .Only need sunshine to get r dun.
 

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Well.....yes, we Iowa boys know all about hard thrashing Glen wheat and common run my return 2/3 full in such conditions. The dual zone allows you to control this much better. I've cut so many many thousands of acres of hard thrash wheat it makes my head spin....

Take a look at our 8120's sample in some hard thrash....I'm quite familiar with it. So was the elevator than filled silos full of 10% dock as it was the norm for the area that year with all machines.....I don't have to harvest in Canada to know how miserable you guys can have it! :D

I would have liked to have tried a Claas in that wheat. We don't grow Glenn but I have to say I've never seen a sample like that.
 

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Discussion Starter · #15 · (Edited)
Well both concaves were level, and one combine in low feed acc and the other high, no difference

One combine has the rotor veins stuck in the retard position and the other when moved to advance made no difference, biggest issue seams to be the rethrasher, as the owner said today, if the combine even sees a kochia or something green your out opening both return doors, that sad..., if he did this once they have done it 1000 times, ulgy dusty job

Dealer advice today was if going into a tough area, close top sieve and run threw it, then open after.... I almost fell on my ass with that reply...

Ended up raising rear of combines to highest axle position to help material stay longer on the pan and not over load front sieve...Another Deere owner had success doing that, and dropped rethrasher load but sample is still over a percent unthreshed

Deere return auger to sieves after rethrasher dealer says needs to be revamped, bottle neck... to small for combine capacity, he replaced bushings, best answer was to reduce speed, chatter box a joke

Both combines leaking oil from bad o rings to spreaders from distribution block, has gone threw five pails of oil and still no recorse from Deere on the fix, block needs to be redesigned since others are having same issue.... Just add oil... Lol

one combine jumping belt off from feed acc, and some issue with ecu on emissions

On the positive side, they worked well in canola but had to run fan at 900rpm

If things don't get better real soon, their will be a color change for sure, dealer is useless
 

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All the way back to the first STS machines, JD designed these combines to be corn and bean machines not for small grains. The bullet rotor is nothing but a sales gimmick, the very first 9750 models did the best job threshing. You have to do the best job possible of threshing the crop out right away, get that grain out of the rotor and onto the sieves quickly and evenly. JD's small wire concaves do not thresh well enough to get this done, and JD's answer to this problem is to install more cover plates on the concaves.......what a joke! I highly doubt your friends problem has anything to do with the rethasher, if the rotor was doing its job the rethrasher should have no problem keeping up. I agree most JD dealers preach whatever "Mother Deere" tells them and until you fix the problem on your own you will never have one of these machines running at capacity. Like I said I can push 1500-1600 bu/hr of spring wheat through our 9860 with PFP upgrades and the return will run right at two or three bars.
 

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if you have an extended top chaffer which is right below ur grain pane and behing the augers below the rotor, you should put in a delete kit for it. Friend told us to do it to our 14 S680 only been in peas so far but tailings and grain loss reduced and capacity increased. extended chaffer is replaced with plastic fingers. you will need part #H132161 (4 of these) and H232985 (3 of these)
 

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Well both concaves were level, and one combine in low feed acc and the other high, no difference

One combine has the rotor veins stuck in the retard position and the other when moved to advance made no difference, biggest issue seams to be the rethrasher, as the owner said today, if the combine even sees a kochia or something green your out opening both return doors, that sad..., if he did this once they have done it 1000 times, ulgy dusty job

Dealer advice today was if going into a tough area, close top sieve and run threw it, then open after.... I almost fell on my ass with that reply...

Ended up raising rear of combines to highest axle position to help material stay longer on the pan and not over load front sieve...Another Deere owner had success doing that, and dropped rethrasher load but sample is still over a percent unthreshed

Deere return auger to sieves after rethrasher dealer says needs to be revamped, bottle neck... to small for combine capacity, he replaced bushings, best answer was to reduce speed, chatter box a joke

Both combines leaking oil from bad o rings to spreaders from distribution block, has gone threw five pails of oil and still no recorse from Deere on the fix, block needs to be redesigned since others are having same issue.... Just add oil... Lol

one combine jumping belt off from feed acc, and some issue with ecu on emissions

On the positive side, they worked well in canola but had to run fan at 900rpm

If things don't get better real soon, their will be a color change for sure, dealer is useless
I don't think any combine no matter what colour could be this bad.
 

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Discussion Starter · #19 ·
Thanks for the replies, will pass on, but we want to try it with the changes done first to see how it compares, it's set up now to another farmers machines that are working better and rethrasher staying in the two to three bars...

Also feel this is all from a lack of rotor thrashing, causing the overloading and headaches downstream, but listening to the other Deere owners the rethrasher is a headache overall and needs revamps

Not many of the new s series in the area and most guys that have them would buy green weather they work or not... And the black and whites

As for the other problems, they can probably be figured out, but why is Deere sending products like that out untested and unproven, with answers of just run it like that till we figure it out, unacceptable to me after writing a cheque for that much...

As for the belt, Was a belt around the feed acc that jumped off cutting another belt off, happened on one combine and dealer said they have seen before, no changes done on alinement

Keep you updated
 

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As for fan that seams dam hi, my 9230 at 820rpm and looks clean... Dealer stumped... Fields he's combine look like a good seeding job after the rains
How can it even make sense to compare fan speed between brands?? Completely different combine. Fans are different diameters, different number of blades. It would have to be another S series to do this.

I agree on the concave leveling. Verify it for yourself. Then calibrate it. Calibrate sieve and chaffer too. So often the dealers just have kids doing pdi's and this is all assumed good.
 
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