CR 8.90

[Fraserb]

Following on from last weeks question about getting the best from a lexion 760, weather permitting its the Nh's turn on tuesday so is it basically the same principle as the lexion or anything else to watch out for.

 

[Phil-the -farmer]

Got a cr 8.90 this year. Power is its only limitation I find.

 

[Fraserb]

Got a cr 8.90 this year. Power is its only limitation I find.

Is that chopping or swathing the straw, a lot of people said to drive the lexion to the engine load but anything above 60-75% load and it was chucking it out the back in the straw

 

[Phil-the -farmer]

I chop 80% of the straw. Runs best with engine load in high 80's.when your up in the 90% load area engine revs can start to fluctuate a bit. Grain pan is the same as the biggest 10.90 so never get to the limit of the sieves with the power available I find.

 

[Fraserb]

It'll always be in the straw we lose grain,

 

[Feldspar]

What are acceptable % losses for you?

 

[Fraserb]

What are acceptable % losses for you?

Depends on how the weather forecast is looking, try to run at .8-1%

 

[Chae1]

Be interested what you make of straw. Cr is worst combine I bale behind.

Do they still have automatic stone trap so it leaves stones in swath. Great idea!

 

[Fraserb]

Be interested what you make of straw. Cr is worst combine I bale behind.

Do they still have automatic stone trap so it leaves stones in swath. Great idea!

We bale behind a few cr's and sometimes the straw is fine, others its really smashed up so will see what its like when we set it up.

 

[Feldspar]

Depends on how the weather forecast is looking, try to run at .8-1%

We had a 8.90 on demo and it produced a lovely sample with low losses. However, it really didn't offer the sort of output that we were expecting. This season we have run our CR9090 with very open concaves (22-29mm) and the rotor speed flat out for most of the time (straw quality not important to us). This has ramped up output considerably from last year when we were using concave clearances of 12-14mm. Earlier on in the season when the crops were less fit we did get a fair amount of rotor losses (up to 1-2%), but we were happy to tolerate this to get the output.

 

[Phil-the -farmer]

They've done away with the auto stone sensor and gone back to a traditional stone trap thankfully. Was not a great system in flat crops on wet ground.
9090 same internals but with just more power surely . As said before power is limiting factor of output on 8.90.

 

[Fraserb]

We had a 8.90 on demo and it produced a lovely sample with low losses. However, it really didn't offer the sort of output that we were expecting. This season we have run our CR9090 with very open concaves (22-29mm) and the rotor speed flat out for most of the time (straw quality not important to us). This has ramped up output considerably from last year when we were using concave clearances of 12-14mm. Earlier on in the season when the crops were less fit we did get a fair amount of rotor losses (up to 1-2%), but we were happy to tolerate this to get the output.

I run my walker machine at 25mm concave in wheat, the lexion was at 32mm, straw is very important to us so run rotors slower, with them at 680rpm the lexion was doing 4.8km/h speeding them up to 1000 and speed jumped to 5.6-6 km/h

 

[Feldspar]

I run my walker machine at 25mm concave in wheat, the lexion was at 32mm, straw is very important to us so run rotors slower, with them at 680rpm the lexion was doing 4.8km/h speeding them up to 1000 and speed jumped to 5.6-6 km/h

Did you have Cemos Auto on the Lexion?

 

[Fraserb]

Did you have Cemos Auto on the Lexion?

Yeah it had it, was pretty impressed with it and think it made a difference for someone like me who has never driven a rotary combine before.

 

[Steevo]

Do they still have automatic stone trap so it leaves stones in swath. Great idea!

Not just that but by all accounts it was only semi automatic. Tripped out, then you had to stop cutting, raise header to reset it, and continue again. Much better to hold the stone and empty the trap as often as needed near field edge or else if the baler doesn't pick up the stone, you'll end up combining it again the following year!

 

[Phil-the -farmer]

Mostly run the cr at 20-22mm this season with rotors at 1150-1200. Only closed the concave if wheat was really thin to try to keep rotors full . Cutting conditions this year were completely different to last year when straw was still green so all the power was used by the chopper.

 

[9630sld]

We had a 8.90 on demo and it produced a lovely sample with low losses. However, it really didn't offer the sort of output that we were expecting. This season we have run our CR9090 with very open concaves (22-29mm) and the rotor speed flat out for most of the time (straw quality not important to us). This has ramped up output considerably from last year when we were using concave clearances of 12-14mm. Earlier on in the season when the crops were less fit we did get a fair amount of rotor losses (up to 1-2%), but we were happy to tolerate this to get the output.

1-2% loss what would that look like on the ground under the swath, I look for 5 under a hand print. Don't know what % that would be say of a 10t/ha crop though. Was told years ago that 5 good grains or 7 small grains in a tenth of a square metre is a 1/4 of a %

 

[Fraserb]

1-2% loss what would that look like on the ground under the swath, I look for 5 under a hand print. Don't know what % that would be say of a 10t/ha crop though. Was told years ago that 5 good grains or 7 small grains in a tenth of a square metre is a 1/4 of a %

Ive got a chart in the combine, in a 10 t/ha crop with a 25ft header and swathing the straw its amazing how many grains it is

 

[Feldspar]

1-2% loss what would that look like on the ground under the swath, I look for 5 under a hand print. Don't know what % that would be say of a 10t/ha crop though. Was told years ago that 5 good grains or 7 small grains in a tenth of a square metre is a 1/4 of a %

I wrote a spreadsheet that works this all out. Here's an example. PM your email address and I'll send it to you.

 

[Fraserb]

I wrote a spreadsheet that works this all out. Here's an example. PM your email address and I'll send it to you.

View attachment 570724

Not as fancy as feldspar's spreadsheet but found a pic of the table in the combine