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Discussion Starter · #1 ·
We are new to CR combines. The combine was a demo last year for the dealer.
The left hand side of the shoe is getting overloaded. When doing a kill stall, everything looks ok to us except that the very far left section of the chaffer is covered with material from front to back. We also know that the grain loss is terrible on that side. Have checked air deflectors from the bottom inspection holes. Have looked down through sieves at fan, louvers on sieves look the same from side to side, have calibrated shoe angle. Will be pulling out sieve today to look further. Any suggestions or advise?
 

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wade, in your monitor change the layout in one of your run screens to show the LH and RH rotor loss. This can show if maybe one rotor is getting more material than the other. Also check to see if the seives are opening together or if the linkages need adjustment.
Did u kill stall thru the monitor?
 

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Discussion Starter · #3 ·
We did the kill stalls using the moniter.
On the run screen it shows comparable loss between L & R rotor when we feed the crop in the center. The sieve linkage has been looked at (we will be inspecting it again when we pull the chaffer). We have been feeding the windrowed crop(Winter Wheat) at right of center to compensate and it seems to help but is not the solution. Doing this the R hand rotor loss is more than L hand.
 

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perhaps the concaves are not in the same position, and you have a difference in clearances, causing more sieve loading (grinding of straw and heads) to drop to the one side. Also, are the concave extensions set the same?
 

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Check the rotors to make sure they have the same parts attached. I was talking to a dealer in the UK and he had a customer with a similar problem and after a hard look they found that one rotor had the pegs installed and the other had none at all.
The rotor with all the pegs was hitting the crop harder and loading that side of the machine more than the other.
Cheers Lindsay.
 

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Question (please dont laugh).

You stated it was a demo machine. Is it possible that after last years demo's the dealer may have washed the unit, and maybe water or trash/straw got stuck in the seive or along the upper shoe frame causing a build up? Sounds silly, but such a simple thing to check!
 

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don't assume your shoe is level when the combine is. it may have either not been calibrated or not correctly. park as level as you can and make sure the self leveling shoe is not leaning to the side. it only knows level by what it was told in the calibration is level. just a thought
 

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Discussion Starter · #8 ·
Pulled LH chaffer out 2day. Didn't see anything suspicious. A very rough measurement says that the rotors are straight. The concave extensions are both in the same hole on both sides. The last coupla times that we have stoppedd, I have had a feeling that the shoe is slightly tilted but realize tht it needs to be running (separator) to adjust itself. I put a level in the truck so as we can check that out closer. ( We are rained out and the combine is 15 miles away) I really don't think it is the problem though but will measure tomorrow. Thanks.
 

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Discussion Starter · #13 ·
The mechanic from the dealer found the problem. There are 2 deflectors in the fan throat to direct air to the outside edges of the sieve. The one for the left side was directing air to the centre/right side.
 

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Discussion Starter · #15 ·
they are adjustable fins that look like straw chopper fins. We will have to adjust them more yet as the side is still slightly loaded more compared to the middle when we do a kill stall.
 
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