Case combines

[RD414]

OK case guys, skill testing time. Why does my canola sample stay nice and clean and then get absolutely terrible and it is really hard to get back to acceptable. 5 to 7 year old 8120s and 8230. Swathed canola

[LEP]

Is it due to the variability of the canola with riper and less ripe straw?

Dryer stems breaking up more?

[tubs]

overloading sieves try to slow down rotor

[beaverdam]

Perhaps a wet or uncured patch of swath, maybe from picking up a swath driven over by the swather.
Hows your wind setting, I know I use a lot more wind now than years back, especially if the straw/stems are really breaking up. Did you try opening the concave a little more to reduce the amount of smalls?

[Herc]

Kill stall when clean and again when dirty. That should tell you what is going on.

[Guest]

Whats in them for concaves
What are your settings?
Big or small rotor ?
Dryer the straw makes it worse ?
Straight or swathed?

[6V53]

Leave sieves and fan set for wheat,open concave and play with rotor speed. Never tried but could be static electricity on the sieves.

[RD414]

Case concaves, 750 rotor, 800 fan, concave at20, 12 top 6 bottom, dry ripe straw. Big tube rotor.

[blackpowder]

Stupid question, hard thresh kits out?

[Herc]

Case concaves, 750 rotor, 800 fan, concave at20, 12 top 6 bottom, dry ripe straw. Big tube rotor.

Bottom 12
Top 10

Seems backwards but has always worked for us.