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Discussion Starter · #1 ·
I am a new CIH owner with a new 2588 and the transition from JD has been a trial. We got peas worked out by the time we were finished but canola is giving us headaches and the dealer can't seem to steer us in the right direction. Best so far is rotor 400, concave (small wire) 5.5(even with grate), wind 1000, chaffer front 1/8, middle 1/2, back 5/8, cleaning sieve 3/8. Wind has to be this high or we get more light trash than canola in hopper but we are losing over the sieve. We have tried Rotor 500 and tighter sieves and everything in between. In stall tests we find the outside two sections of the chaffer piled full and the center bare. At lower wind there is a bit sitting on the center sections but the sides are piled up about 6" deep and hopper full of trash. Today is a rain break and the dealer is coming out to replace the 4 separator bars with rasp bars. They believe we are getting too much material onto the sieves yet when I do the stall test it seems pretty even across and the auger pipes are sill visible. I thought there was some kind of blockage deflecting air away from the sides of the sieve but can't find anything except the fan throat does angle in about two inches on each side which would deflect some air inward. If anyone has experienced this please help or any other hints would be appreciated. Thanks
 

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Here's what worked for me this year: Rotor 420 (except in tough straw was up to 600), fan 750 - 800, similar sieve settings, except bottom closed more i think, concaves were around 3-4 mornings and evenings, around 6 in the day. We had no chaffer losses, but wouldn't get it all out of the rotor over 5.5 mph in a 25' swath.

Hope something there helps...
 

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For us in a 2188-
Rotor 550-650 (higher in the afternoon reduced losses for some reason)
Concave 3.5-4
Fan 750-850
Chaffer 1/8, 3/8, 5/8
Sieve 3/8
We have 1 tried 2 SW, 1 WW and 1 SW, 2 WW. 2 WW seems to put more fine trash in the tank. We bumped the wind up a little to stop that, but if I wasn't so lazy, I'd change it back to 1 WW.
We were having losses too. I set the concave to where the losses were least and I just got mad enough to start increasing the rotor speed until something changed. I had been reducing rotor speed to try and stop breaking the straw up. Found that increasing it reduced the losses which was totally opposite of what I expected.
 

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Hi.
We have a new 2388 here in UK and have had problem getting clean sample in all crops. I believe it is due to the new back rubber and generally closed up nature of the combined chaff straw spreader. I believe it restricts the air flow from the fan and makes distribution across sieves uneven.
I have removed back rubber lifted spreaders back to old position and dropped plate at rear of sieves to give air somewhere to go.
It has given good result in wheat removing short straw and chaff too late for the awful sample in barley, full of beards, even with fan on max, and in canola like you rubbish in sample and seed blowing over.
Dont know if your combine has same combined straw chaff spreader but consider if it could be restricting air flow over sieves
 

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Discussion Starter · #6 ·
Thanks everyone

The answers have been appreciated. Many different suggestions to achieve the same result. I am a bit puzzled about closing the cleaning sieve more to take out trash as I thought the trash should not be down there to start with. I was wondering if the closed up nature of the rear end is part of the problem. I am tempted to remove some of the rubber and see what happens. It seems that I have gotten the "speed the rotor up to move the material thru more quickly" hint here and in other places so will try that. We are in a rain delay and it looks like it may extend a few days yet so we are not able to try.
Thanks again
 

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what kind of grates doe you have? Is it dry or whet? What about yield? In witch position your wanes?. You dealer basically right you have to much MOG on sieves. If you would check the cleaning fan I believe you will find some grain i it as well. You target is minimum threshing in the rotor (canola is done in feeder so the rotor has to move material to the back of the machine no more). Of cause there is big difference in dry and green conditions. it is difficult to say something decent with out seeing the crop.
 

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Discussion Starter · #9 ·
The grates are slotted as from factory, stems are green but dry, yield is 35-40 bus/acre, vanes are in the center position. In a stall test, how much MOG should there be? I believe if it was spread over the whole sieve instead of piled on the side sections it would hardly cover. You are not the first to tell me there is grain in the fan housing but there is not. In the last couple of days I have been in, under and thru that whole machine trying to find the reason for the poor air distribution on the sieves.
Thanks
 

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We traded 98 2388 for our new one so had experience of case axial flow and no problem obtaining clean sample. New combine seems to always have trash in sample and also saw chaff etc.and even canola seed blowing out sideways through holes for seive adjusters and rocker shafts, battery cover was always covered in chaff which never happened with old one.

Changing spreader/seives to same spec as old one seems to have solved all the above but chaff is no longer being spread.

Not hard to do and easy to undo if your not happy. Remove rear rubber and tie side rubbers with string, drop plate at rear of sieves two bolts on either side, remove anti wrap rubber and deflector plate, take quick attach extensions off spreaders and replace useing bolts. There should now be 6inch gap below spreaders and seive plate.

If you leave fan on 1000 I think all canola will be on floor. We ran about 600 on old one which I guess would be 700/750 on new one.

Hope you try it would love to know if I am right before caseman comes to mine.
 

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In my opinion, Canola you have to keep the combine full and keep the chaffer and sieve from coking the air flow. Separation of grain and chaff is not done on chaffer and sieve but in the air above it. The sieve is to keep out the larger items. ie branches, straw, deer droppings and so on. not chaff. But I don't know I just work for the Bank.
 

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Discussion Starter · #14 ·
Ok, here's what is working now. 600 rotor, 3.5 on concave, wind 950. Slightly closed the cleaning sieve removed some of the trash. The canges to the machine made by the dealer are put missing vane in above concave area and removed seperator bars. WE basically doiubled our thru put because it feeds evenly now and a fully loaded cleaning system works much better. Getting about 5 mph on a 30ft swather yielding 40 bus. Truck can't hold a candle hauling 5 miles. Losses now are about the same as they were at half the speed and I,m a happy camper. There is still some overloading on trhe sides of the chaffer.
ThaNKS EVERYONE
 
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