Is there a lot of straw that the combine is having to chop? Only in very heavy straw have we run put of power before the grain losses got to high with our 590r in wheat. Is the engine smoking or putting out a lot of black smoke?

 

For what it's worth. I would check to make sure that your fuel tank is venting. I have ran across this on other things around the farm. Look to see if the plastic tank seems to be sucking in and listen for suction when taking off the fuel cap.

I know case combines had issues with this a yr or 2 ago.

 

check intercooler pipes and radiator for leaks

 

Can you run your concave wider? Just have your stationary knives on the chopper in enough to do the job, if your fuel filters are good and air cleaner and radiator are as well your next option is something like an Ecotune our Lexion 750 is a totally different machine since we had it done went from 100% average down to 85% average power use, plus less fuel plus it runs cooler

 

SouthernSk - There is not a lot of straw to chop. Have been cutting higher to compensate and power consumption hasn't changed a whole lot. Engine isn't smoking or putting out black smoke.

Darcy - there is definitely a suction force when u take fuel tank cap off. Is the vent for the fuel tank just on the filler cap?

Farmac - rad has no leaks that I've seen. Will have to take a closer look. Coolant level is consistent. Also isn't getting hot.

Aussie ltd- chopper knives are not out very far. Also concave is as wide open as it can be to get wheat threshed.

What draws my attention to the whole problem is the fact that engine load with separator and header engaged is running at 28%. Be curious to see what others are running in a no load position.

 

My 750s run 28% engine load at full throttle no load machine running empty. That seems about right. Handling lots of straw seems to really take the power. Pull stationary blades back so they are barely sticking out, check inter cooler for leaks, check fuel tank vent. How many bushels per hour are you doing?

 

There should be a vent on the tank somewhere but I'm not sure the location. A person should never have a vacuum in his fuel tank.
That's a long way from the bottom of the fuel tank to the engine already. Now add in a little vacuum and this maybe your problem.

 

Something does seem wrong here because we are running 595's with 45' mac don drapers in heavy WW doing 80 Bpa cruising anywhere's from 3 to 4 mph.

 

I wonder how tough the straw is and how much of it you have to put through the combine?
Is it lodged or leaning enough you have to cut quite low?

While it does seem like you may have a legitimate power issues I just don't know enough about the conditions to be sure.

Which chopper?
Are the stationary knives all the way in.
Is the retarder panel up or down?

This is at least the second season for the unit sounds like, did you run it last year?

 

There's nothing wrong with your combine...we are doing 70 bu spring wheat at 17.5 moisture with our 750 35' maxflex and crawling from 3-3.3 mph...friend across the road with 8090 nh and same header-same performance...both combines are on their knees... Why? Because the straw isn't mature and is tougher than the grain would indicate...try dropping some straw and you ll see that's where the power is going. I'm very interested to hear more on Aussie s 750 tho...is that system simply a plug and play chip tuner or is the e c u adjusted via computer? How much hp did you add...does your dealer care/know? I have been wondering about bumping our 750 to 760 hp as well

 

We wre cutting spring wheat at 20% moisture with 40' heads and wet straw out of chopper with 780TT's, both combines were begging for mercy at 3.3-3.5mph. Losses were over the rotors simply because the straw was so wet and the grain just stuck to it...at that speed the losses were acceptable to us. We wre running 85-100% of power.

 

The week before we combined winter wheat 13% moisture dry straw yielding 5 bu/ac less than the spring wht. 4.5-5.2mph 65-80% engine load

 

Cemos Auto still working good gm?

 

Yes it is, still learning to fine tune it, I give the major changes it makes to the other combine and we can stay close in performance...so if you run more than 1 combine you can safe thousands of dollars by keeping the non cemos combine informed of what just happened in the cemos combine

 

I am curious, on average do you find the settings similar to how you would set a combine, or what has jumped out at you that has surprised you on its settings, sieves way more open or closed, or way different fan speeds. Maybe I should have started a new thread.

 

Don, it is actually very user friendly and one of the best features is that I can see all the functions of the combine at once.

 

Suction on tank is bad. Engine load can go to 100% sitting still if you don't get fuel, such as running the tank empty. Vent line should be by radiator, little clear line. Blow it out with compressor, maybe blow in the tank with minimal pressure first to clear line. Put small gas engine fuel filter on end of vent line to keep it clean for the future.

 

We have only been combining for 3 days so i have limited experience but you start out with your own settings and you have to tell it various parameters as in harvest conditions and what you would like to have optimized ie. fuel economy, max throughput, clean sample, loses, or balanced approach.

It then will make adjustments on the go to your shoe, including sieve opening and fan speed and also your seperation aspect, except concave clearance.

I have noticed so far that it will play around with the rotor covers while combining and sieve openings including fan speed...quite variable at times. It runs the returns a lot higher than i would and has a very clean looking sample in the hopper.

Don has had a whole season on it already and he would be able to give a much better review of the workings of cemos.

So far I like it a lot.

We have one combine with it and one without, when I passed the settings on to the other combine we where pretty close in throughput. Without that info he was slower and had a dirtier sample in the hopper.

Cruise pilot is a must because it will push your combine to where you will not go on a sustained basis without it. After only 3 days we can't believe there are people who get new combines without automation!!!!!

 

have you had the techs out to check injectors that they are all firing properly, and the fuel pressure is high enough to all injectors? I had a 760 also that had no power and everything checked out on the computer but tech agreed that it was underpowered but couldn't do anything about it. I had a demo out to run beside mine and fuel usage was quite a bit less and it was a mile an hour faster in same field at the same time. doesn't help much I know but I feel your pain. Good Luck

 

wonder if you can cemos in 15 bpa canola thats flooded out?
would you run the cemos in soybeans gm, as your usually limited by cutting speed

 

We will find out soon enough I guess because I have plenty of drowned out canola. You can also set your max speed wherever you want, and we usually try not to cut our beans faster than 4.5mph.

 

I had our 2010 model Lexion 750 which is the same as the new 760 (confusing) tuned by Agritune here in Australia which is rewriting the ECU files to suit the application eg boost hp by about 15-20% changing the torque rise to suit the application for that motor, so the original factory files have been overwritten and lost but apparently you can now buy another gadget that let you have your original file stored and the new upgrade as well and you can just plug in and change to which ever one suits you at the time so if you upgrade your combine you could move it to the new one possibly bit like a piggy back type unit you can get. We were more or less out of warranty when we went with this setup and no one from Claas here in Aus has said anything, but I have never been real happy with the motor in my Lexion power wise it was never as good as the combine that I demoed in the first place, but I wonder are all factory ECU created equal or do some have different floors that stops them from performing as good as the next one, What I have said in this post is what I believe to be correct but doesn't necessarily mean it's 100% correct I will know more in about 2mths when were in the thick of harvest but at this stage I am happy with the difference it has made

 

I had our 2010 model Lexion 750 which is the same as the new 760 (confusing)
In the states here, your 2010 750 is the new 740 not a 760. That is how I understand it.

 

How far is your concave open? You can reduce the performance a lot if you run it too tight or the cylinder too slow!

 

We checked fuel tank vent tube and there is 2 spots were line was pinched. Not sure if that is all it is for having a lack of power. But should solve suction on fuel tank issue. Won't be able to try for a couple of days as we got rain the last couple of days. Will try dropping some straw and seeing if chopper is taking too much hp.
Don - we are not cutting low. Cutting quite high ( for us anyway). Have the knives almost all the way in. It is our second year with this combine.
Grain guy - have not had techs out yet to check fuel pressure to injectors. What did your problem end up being? Or never found out and made it someone else's problem?

 

mbjets-never really found the problem but did blow the engine...so ya made it someone elses problem. bearing cap went through front and back of engine, made a big mess...dealer tore engine apart and found that the bearing caps are specific to the rods and two were switched at assembly.

 

Mbjets did you finally figure out what was causing the lack of power?

 

we have noticed the combines are really working hard this year soft ground lots of straw and its damp and such the canola makes them work too the chopper on our one combine bent the stationary knives guess the rotating knives where a bit dull when tough material pulled by rotating knives got dragged between stationary ones it slightly bent them causing some to touch rotating knives new chopper knives in morning I guess