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just a tish NE of central ND | I am having a hard time getting a nice sample of oil sunflower from my 1480 and still having much cleaning capacity..Lots of seeds and fines in the return.Im at 380 RPM on the regular rotor and at 5'' on the concave...Had the air speed all over the place and still seem to not be satisfied with my sample. Seives are closed enogh to keep out larger chunks of stalks/ heads..High fan speed seems to throw over some seeds and yet there is plenty of fines in the return.
Suggestions anyone? Jon Hagen/ How do you do it?Or dont you grow flowers? |
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Hagen Brothers farms,Goodrich ND | I quit growing sunflowers a few years ago, got sick of feeding the birds .
Rotor , as slow as it will go.
Concave, open er up until the heads come out the back still intact, you may be grinding up the heads too much.
In the morning I will check the book and post my fan, concave and shoe sieve settings.
Make sure you are not using key stock grates.
I suspect you have the concaves too far closed and are breaking up the head pads.
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just a tish NE of central ND | You still up Jon?Thought you would be fast asleep by now. Just came in not to long ago myself. You must have harvest all wraped up for the year !(:
The sunflowers and the "crap" in there seems to all be the same weight so it is hard to clean and have capacity.Ive been thinking that the vanes shoud be in a more agressive position.
Edited by School Of Hard Knock 10/26/2007 01:55
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South Central Kansas | I take ot the keystock grates and put the slotted grates back in for sunflowers. Make sure the cross channels are on the outside so the inside will be as smooth as possible.
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N. D. | Make sure your concaves are not lower than the grates. I cover all three grates so less crap ends up on the cleaning seives. |
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Southeast Colorado | We used sheet metal and covered all the cleaning grates. The book says to use solid cleaning grates but this accomplishes the same thing only cheaper. Sunflowers are hard to clean. If you can cut in tougher higher humidity conditions it helps but sometimes that is not an option. With the combine set the same way we have had from 2% FM to 20%FM just due to weather conditions and the maturity of the crop! |
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Hagen Brothers farms,Goodrich ND | Yes, use the grates as wildcat1 says. I have a light steel grate cover that I have never used, was able to clean up the sample without it. Come and get it if you want.
In sunflower, you need the cover (ripple tin) on the front 12 inches of the AF chaffer. Even corrugated box cardboard wired on works for a long time. This makes a big difference in SF.
Have seen the same thing,crop and harvest conditions can make for a dirty sample that you can do nothing about. |
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just a tish NE of central ND | OK! You got me here, "What is the ripple tin?"I dont see anything about it in my book. Id have to look in my combine, but I dont think I even have the wire fingers like my 914 has above the seive and below the delivery augers.What is a ripple tin?Where is it located? One thing that I do have is a modification of sort , a spoiler or an air scoop(4" metal louver strip) has been welded to the lower part of the seive about ?? 12 inches from the front and pointed upward to direct the air upward in the front section of the AF seive.
As far a the cover for the rotor cage, I never thought to try the cage covers. I have two of them here that were with the machine. The previous owner got them to do some corn.. Ill have to try them. In my book, someone has written in there to set the fan at 900-950 rpms for sunlfowers. ........I find ALOT of heavier seed on the ground if I set the fan this fast.I run less than (around 800 RPM.)BUT<<< my return is full. Too full in my opinion. Lots of sunflower and lots of fines. If I open the seives more I get biger stalk chunks in the sample.....
I finished sunflowers last night , but have plenty of "stuff" in the bins with the flowers also.
Edited by School Of Hard Knock 10/26/2007 11:06
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Hagen Brothers farms,Goodrich ND | Info on the ripple tin is not in the IH book, it is for the aftermarket air foil chaffer.. My old 1480 has little air getting to the front of the chaffer, just the way the stock air distribution is. This causes heavy stuff falling off the auger bed to fall right through the front of the chaffer where there is little air to resist it.
Harvest services, the outfit that makes my air foil chaffer knows that and supply's what is called ripple tin. Ripple tin is a solid sheet metal plate with that same stepped shape as the chaffer surface, so it fits tightly on the surface where you attach it with pop rivets , plus the ripples "walk" the material to the chaffer rear. The ripple tin on the front 12 inches of the chaffer prevents this stuff from falling through that front air starved area and makes more air available for the rear 3/4 of the chaffer. A quick fix is to cut a cardboard sheet, 12 inches high and as wide as the chaffer, which you attach over the front foot of the chaffer with thin wire. The cardboard will last quite a while and allows you to see if a genuine ripple tin will help your situation. We have them on both of our combines, and it made a dramatic difference in the SF sample.
Another thing is if your getting too much heavy SF seeds in the return, is that you may have too much air trapped under the bottom sieve which is blowing seeds over into the return. The fix for that is to remove the bottom sieve and remove the front 5 rows of sieve fins. This creates a hole that directs less air under the bottom sieve and more under the AF chaffer. It was very hard for me to trust the advice from Harvest services and take a grinder to a brand new sieve that first time, but it works well. That bottom sieve is mounted so far forward that nothing falls on the front portion where those fins used to be anyhow.
Edited by Jon Hagen 10/26/2007 13:13
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Hagen Brothers farms,Goodrich ND | Click on the service bulletin for info on the ripple tin and shoe sieve mods on IH combines, especially the top item about Case IH rotary combines. These mods work well in any crop.
http://www.harvestservicesltd.com/index.php?p=bulletins
Edited by Jon Hagen 10/26/2007 14:23
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just a tish NE of central ND | Ijust thought of something! !!!!!!!!!!Another thing that my 1480 has that I have never seen before is there is a white rubber flap about 6 inches wide bolted on the front of the bottom seive that seals air from the fan under the seive so it has to go through the seive to get to the top the top .(Ill have to look at it again to see how it is set up, I forget) I looked in the book at Lelms,The Harvey dealer and it says it was an option.The air all has to go through th bottom seive the way it looks to me. Maybe I should remove that flap.(see EDIT below) Now that I think of it , it seems that I am having a hard time lifting the fines and still have the seive closed far enough to keep chunks out. The size of the peices says I have it open far enough alreadty.
When I got this machine there was also a peice of white 6 inch flap bolted on to the back of the seive . It hanged down agains the return auger trough and I looked at that for a while and SCRATCHED my head really HARD ........and then took it off as it ocured to me that when air gets under the seive the flap was tight agains the back of the return auger trough.Nothing could get through untill there was enough material jamed between the rubber while it was shaking back and forth to make an opening. In other words, it blocked the tailings from the bottom seive from falling in to the tailings auger......Couldnt see what the guy who installed it originally was trying to acomplish other than to seal up air flow from leaking out on back of the bottom seive. Previous owner tells me it was on there when he bought it so who knows!
I do have that row of fingers in here also. (I looked to refresh my memory)
EDIT, The white flap is on the top front seive sealing it from loosing any air. Will that mater any as far as cleaning out the fines?
Edited by School Of Hard Knock 10/27/2007 16:40
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sunflower settings for 1480?Rotor /fan speed, Hints?
