First run with the 615

Well this weekend I got to run my 615. I bought it for 900 bucks at a sale. Found a three row wide corn head for it (834), turned it into a three narrow (833) and got it all set up and used it. Now I have picked alot of corn but never combined so hoping you guys can help me fine tune it. I got the speed of the cylinder about 560, 1 inch clearance in the front and 7/8 in the back. I got some trash in the bin but I think that was having the sieve open too much which I closed down, also my fan belts were giving me fits and I need to replace them. But I was getting some cracked corn in the bin and it split some cob pieces in half, is my speed too fast or should I adjust the cylinder spacing? Also I attached some pictures sorry they arent the best but I got a big buildup of stuff behind the rock trap which is the one picture, is that normal? I will have to say even though it was only a three row it was an awesome feeling combining.
a174387.jpg

a174388.jpg

a174389.jpg

a174394.jpg
 
That second picture? Is that your grain sample? Husks, half ears, etc???

Do you have anybody near by that has experience with a conventional combine?
 
One inch is too close at the back of the concave, and way too close at the front. Open the front to almost two inches and back to an average cob diameter plus .250". Cylinder speed should be good. Some crackage is normal if the grain is dry ( 17% or less) Open the bottom screen wide open or remove it altogether. Open the top screen till you begin to see cob pieces. Give it all the air you can and make sure the wind boards are directed toward the front of the shoe. Check for cobs with grain left on them. Close the back of the cylinder some if you are leaving grain on the cobs. It is normal for the rock trap to fill with grain cobs and shucks.
 
No the second picture is what was stuck behind the
door for the rock trap. The sample of the grain is
what I was holding in my hand
 
Moisture on the grain ran 15 to 18% so your saying I should take the shoe all the way out and just leave the sieve in?
 
If that second picture was your grain sample you would be in a world of hurt! Heck, even I know that!! Wouldn't explain the third picture either. I am headed out next week, God willing and the crick don't rise! Gonna be a learning experience but then, what isn't?
 
Leave the rock trap closed until done running corn. Your clean grain sample looks like you need to change some settings but I only noticed cob pieces so it is likely the sieve and chaffer need to be closed a little. When I asked for help with my combine everyone told me to give it lots of air. As others suggested you may need to adjust some cylinder speed and spacing.
 
Here is what Mike Aylward says (on JD Combines) and is good advice.

If the cobs are broken lengthwise the concave is too close. If the cobs are broken crosswise the concave is too loose. If you are getting cobs in the tank close your bottom screen. I like to close them completely, then open until you hear corn go through. Your little finger will be a close gauge. Cobs should come out of the combine pretty much completely whole until they get to the straw chopper. Mike

It is difficult to eliminate all cracked corn but the dryer the corn, the slower the cylinder speed. Heat Houser
 
Looking at the grain damage I think your cylinder speed is about 100 rpm too high. Try about 2 inch front and 1.5 rear on your concave. You will have to experiment with the sieve settings to get clean grain.

I am running a 715 and it works best at about 450rpm cylinder speed.
 
Awesome looking outfit! was it a lot of work taking that head down to 30" rows? Or was it made to be interchangeable? I love picking corn but shelling can be a lot of fun too!THat's what i love about farming. It beats working for a living !! lol
 
Does your 615 have filler bars between the cylinder bars...Our 403 and 715 did a better job with them in it..Less cracked corn and cobs..
 
It wasn't too bad except for the tin work. The
units slid together and I had to cut ones shaft
and buy another coupler. For the tin work I ended
up cutting about 3 or so inches off each side then
overlapped then and welded it. Originally they
were bolted so they could be adjusted but I made
them permanent. The snouts I did bolt together. It
wouldn't have cost too much but I did all new
knives and other parts on it but it is pretty much
rebuilt and worked like a champ.
 
Im gonna try setting it with 2 inches front and 1.5 in the back. First though I have to get this fan figured out. The one belt is all but worn out so Im getting two new ones now the arms on the pulleys are tight and im working at getting them freed up so they move better. I just cant wrap my head around how this system changes the fan speed it seems if I adjust the fan knob it pushes the one pulley the same way that the tightener at the bottom does. Does the belt just ride in different places on the pulley based on the tension?
 
Just open it up, it should be fine. It is possible to gain some capacity in high yielding corn by removing the bottom screen if you are pushing the machine to its limits
 
fix the fan first,you're close on the adjustments if your not throwing grain out the back and it's cleaning the cob, the cob pieces in the picture appear to be the very end of a soft dry cob when you get the cracking under control that will help solve some of the cob going in the tank ,the front of the concave is a little too tight,slow the cylinder down in dry easy shelling corn it may give good results as low as 400 and still clean the cob, see what it looks like then adjust one thing at a time until you get familiar with it,as the old timers use to say cylinder speed makes feed
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top