Honest combine output

Timbo1080

Member
BASE UK Member
Location
Somerset
Edit : and the straw is so lovely, that a couple of rotaries in the region have been told to turn on the chopper by the livestock guys, as they don't want the straw, but can't get enough of the walker stuff. Most probably erroneous rotary set up, which seems a shame, as even though the straw prices are awful (for those selling), it's still a commodity that adds to the GM of the crop. I'd gladly have a rotary, but as has been mentioned before....I'd need to up my output further down the hauling line, and it's bloody hard to find someone to how how to set a rotary up properly, wrt straw....especially when it's cracking dry.
Rotaries will smash the straw to pieces if set up incorrectly, and given that conditions change so much during the day, are there many people that can be arsed to continually adjust the rotor settings for straw quality, when all that they are really interested in it grain output?
 

l'ordinary bonville

Member
BASE UK Member
Location
N Yorks
I had a JD T670i for 4 seasons after years of a 5 walker lexion. Potential wheat output 40t/he plus on the monitor driving down the field. Early and late in the day down to 25t.
It did really well in bone dry conditions with no straw. Everything else it drove me mad.

Lexion 670tt this year much more consistent output but 35-38t/hr absolute max so far. Late in the day down to 30t.
Lexion just doesn't have issues though. It keeps rolling on through laid patches, wet patches, unripe, soil ingestion, in places where I would have been cursing the jd.
Net result is despite lower peak output I get more done in a day

Rotary would rubbish up our carting and drying logistics and too expensive for new.

New vario header spot on
 

Honest john

Member
Location
Fenland
difference is like a horse vs tractor - i'm amazed walker machines are still sold

I know a million post about poor straw quality will now follow but its purely down to setting them up right and you can produce perfectly good straw behind them

rotaries are much simpler machines with fewer moving parts so I would expect lower running costs / ac

your only problem will be finding one that only does 25t/hr I guess !!

Clive
How can you achieve that in dry straw.
Apart from Cave gap & drum speed what else can you adjust. Do you have vane adjustment to speed it though the rotors ?
Thanks.
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
Clive
How can you achieve that in dry straw.
Apart from Cave gap & drum speed what else can you adjust. Do you have vane adjustment to speed it though the rotors ?
Thanks.

Wide as pos concave (which I reckon 99.9% of rotary operators usually run twice as tight as it should be) then drum and importantly rotor speeds matched to conditions

the ability to change rotor speed is very important on a rotary and it will change hourly throughout a cutting day - I reckon a lot of operators simply don't bother

Innovation like Cemos auto is recondition of the fact that the weal link on most combines is the operator these days both from an output and sample / straw quality point of view
 

jonnieboy

Member
BASE UK Member
Location
North Yorkshire
That makes good sense
As with a walker machine to lessen walker losses you give it more in the drum area
so I suppose most people would think similar on a rotary
All I need is the rotary now to practise on !!
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
That makes good sense
As with a walker machine to lessen walker losses you give it more in the drum area
so I suppose most people would think similar on a rotary
All I need is the rotary now to practise on !!

best rotary operators are ones that never drove a walker machine ! losses on a rotary can often be reduced by going faster and reducing how hard you trash the crop, not intuitive to a seasoned walker driver who spent his life slowing down and adjusting things in the opposite direction !
 
Looking at small rotaries anyone seen the baby axial flow 5130 looks a contender to replace a 5 walker! Our 5 walker Deere is suffering now wheat very ripe and straw just crumbling and overloading sieves down to 12tph in 4.5t/ac crop!
 

l'ordinary bonville

Member
BASE UK Member
Location
N Yorks
Clive. How wide are rotary claas concaves set.

I am running walker concave at 12 when the book says 10. I have very heavy crops though so I run a notch wider. I guess I'm still too narrow.
 

Clive

Staff Member
Arable Farmer
Location
Lichfield
Clive. How wide are rotary claas concaves set.

I am running walker concave at 12 when the book says 10. I have very heavy crops though so I run a notch wider. I guess I'm still too narrow.

in wheat 25-30 would be typical here unless something extreme like trying to get a crop off that's not quite fit when we would tighten up (destroying straw and output in the process however) rotor speed would vary from 700-900 through the day as crop goes from damp--dry-damp but always as slow as needed, the combine should always be set to do just enough, over thrash and you overload sieves and sample, losses, straw quality and output all suffer

I don't know much about walkers as it a long time since I drove one but suspect you need to be tight as the drum is your only thrashing hence why walkers output will always be limited
 

beltbreaker

Member
Location
Ross-shire
Looking at small rotaries anyone seen the baby axial flow 5130 looks a contender to replace a 5 walker! Our 5 walker Deere is suffering now wheat very ripe and straw just crumbling and overloading sieves down to 12tph in 4.5t/ac crop!

I would agree. i am operating a 20yr old equivalent (1680 Axial Flow) in the north of Scotland. Cutting 4.5t/ acre wheat she sits at 28-35t/hr spot peaking at 45 before the clean grain elevator blocks realistically 25t/hr in yard generally moisture 20-25% but straw burnt with roundup. Barley and Oats it spots at up to 30 but works away at 20-25t actual. Everything is baled apart from OSR.

Cheers BB
 
Last edited:

Steevo

Member
Location
Gloucestershire
in wheat 25-30 would be typical here unless something extreme like trying to get a crop off that's not quite fit when we would tighten up (destroying straw and output in the process however) rotor speed would vary from 700-900 through the day as crop goes from damp--dry-damp but always as slow as needed, the combine should always be set to do just enough, over thrash and you overload sieves and sample, losses, straw quality and output all suffer

I don't know much about walkers as it a long time since I drove one but suspect you need to be tight as the drum is your only thrashing hence why walkers output will always be limited


Run a 30mm concave on a walker machine here. Only run it tighter when in unfit crops, same as your rotor. If you imagine a a 1m wide drum, with only a 3cm gap underneath it for 20'+ of crop to go through, that's quite a tight fit which will remove the grain no problem. Reduce that down to 20mm, 15mm or 10mm like some people and you're not really doing any better job at all, just burning more diesel, slowing things down and ruining the straw.
 

Chae1

Member
Location
Aberdeenshire
Rotary won't be worth as much second hand when you sell it. Our 570 has been more bother than any other straw walker combine we've run and cost a fortune to run.

However still wouldn't go back to straw walkers. Harvested 600 t of malting barley in couple days last weekend. Haven't had many decent days since. That's priceless.
 
Lexion 540, 7.5m header, unloading on the headlands (No chasing), 3 1/2 fields cut (involving header changes). Started at 11am, finished at 8.30pm. Only one quick cuppa. No laser pilot/auto steer etc. Not pushing it, but not hanging around. Next to zero losses. 25ha cut, in a 4.2t/acre crop (Average, dry and over the weighbridge) of Winter Wheat. Nicely matched to 2 17t trailers constantly on the move, and one reserve trailer parked up as a buffer, with a 4 mile haul to the grainstore.
Just to answer the OP's question.
How fast you cutting? you'd have to be doing 7 kph at least allowing for turning etc and at 10 t / ha you're stopping and unloading a lot...... I'm wondering if you are remembering a little wrong.....:ninja:
 

CHAP Webinar - Innovative tools to overcome the challenges of Regen Ag

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