[mrgrothen]

Pulled my cdf rotor this afternoon to make some minor changes on the discharge helicals and replace row C bars on the rotor. In this process I noticed something interesting. 2 years ago I installed the partial steep slope helical system on my R75 and at the time replaced row C bars as they were getting worn. Seems like with the standard helicals there is a lot of pressure and wear on the left side of the concave and row C takes the brunt of this wear. I made the mistake of purchasing some bars from shoup as they were less expensive than agco bars and after two seasons they have worn down enough to justify replacement. Actually they were the most expensive due to their short life but that's another story. The interesting thing is how evenly the bars were worn from one end to the other. With the previous helical setup, the left end of the row C bars usually wore considerably more than the right end probably because of all the rethreshing. The soft bars proves to me that the steep slope helicals are doing a more even job of loading the left side of the concave as I would have expected the wear on the soft bars to have been considerable on the left end vs. the right end. The soft bars merely made it possible to observe the benefits of the steep slopes sooner than if better chrome bars had been installed in row C. I believe that without the steep slope helicals, these soft bars would have had a difficult time lasting two seasons as they should have worn the left rasps down nearly flat. Hope this makes some sense.

 

[silverluv]

Hey corsair that is a good observation. I often wondered about that area and if the helicals would fix that. I was thinking that i would make the switch before wheat harvest, but now will definately do this. Thanks for the update.

 

[Guest]

When we had our gleaner we put a set of Boronised bars in our machine. The boron made them hard, Probably harder than the chrome ones that we were using. But the metal underneath was probably no better than recycled pop cans. As soon as a small rock or something chipped off the coating, They wore very very fast.

We to had problems with wear on the left side of the of the concave. Good to here that there is something that makes this better.

 

[tbran]

Spacer bars are available for the CDF rotor. These spacers are 1/2” thick and fit under the cylinder bars on the
thresher side. The kit includes longer hardware for installation. These bars reduce rotor loss and improve rock
protection. They are field installed only.
BRANDS, MODELS AND SERIAL NUMBERS INVOLVED
PARTS AND TOOLS INVOLVED
CORRECTIVE ACTION
In extreme conditions where more separation is required, such as high yielding wheat and milo, it can be
advantageous to install the spacer bars. Also some additional rock protection is provided with the spacers. Power
requirements are not increased since the bars are only on the thresher side. Instructions are included in the kit.
PART NUMBER QUANTITY DESCRIPTION
71427107 1 Cylinder Bar Spacer Kit

 

[tbran]

that was FYI on keeping up with available kits.

 

[rcfynrdt]

Have some questions Tbran we are running corn soybean machine (r65) with CDF rotor. We have been having problems with over loading the right side of the seives. So much so that you can see couple inches of noticeable height of pollished shine on the dividers. In the past we have always blamed this on running sieves to tight and running to much on the return. We are now starting to thing that possibly we are over threshing on threshing side. Would the steep pitch helicals and spacers be something for us to try. Or no spacers and steep helicals. Local dealers are no help they are frustrated that we keep tweeking but we just can't get the sample and capacity and samplewe could with the old 8 bar with bars removed. And that was with an old short shoe machine. I wish they would hurry up and let us see this new combine so that we can maybe put some of these design changes into the old machine before this fall.

Thanks
Eric

 

[sumner]

I am learning the hard way about the problems with dealers who's thinking is OEM only. I have a friend who is a dealer in another end of the state who believes that you use whatever works. The thing that makes me mad is you spend a quarter of a million dollars for a class 7 combine, are delivered a class 5 1/2 then it's up to you to search for aftermarket equipment to spend more money on to build it up to class 7! AGCO needs to get their $hit together fast. Bruce Baldwin at Kalvesta Implement has help me alot with ideas to improve my A-75. Starting the 3rd harvest with this machine I am hopefull that finally we really have a class 7. Agco service tech Doug Lowen has also been very helpfull, as for the rest of AGCO they have been a joke. Bruce suggested to us to put in 4 narrow wire spaced Precision concaves, change threshing bars to narrow 1/2" bars, remove reverse bars and all knives from the rotor. That totaled another $4,000 but if it does the job along with the latest Sisu software update then the additional money spent is worth it. But those options should have been available when we ordered the machine new. I read The Combine Forum all the time and see that you R fellows are always using aftermarket equipment to increase your capacity too. My question is why the He11 doesn't AGCO offer these types of packages to make their equipment preform better?

Better stop my rant now, as you can see I'm disappointed in my once customer friendly company. It's not the same company of the 1960's.

 

[nddan]

Well 1923Gleaner most of us Gleaner Natural Flow guys don't know anything about axial machines. I will say over all the years and various engines that low HP complaint is from excess power consumtion (not that newer software hasn't added the snap and torque rise you are looking for). The Gleaner Natural Flow has the steep thresher helicals for 2010 production plus about all the other tricks that you read about back to the first large P3s in 1990. Now you have some guys looking to improve or hyperize the fairly new CDF for their conditions. More can be read about this at http://combineforums.proboards.com/index....ad=19257&page=1 under the topic 2 rotors on Jan 2nd 2010. The new Super7 may not need steep thresher helicals for the larger diameter cage and posible drop off point of rear of concave may allow normal pitch helical to guide straw around cage and miss the second pass over concave. I've looked at a few designs of Axials that actually use the front section of rotor for threshing and it is easy to understand why there are so many ideas to try prevent overthresh, underthresh, ect. as the crops or conditions change by the hour.