JD 6620 in soy beans

2underage · Oct 25, 2014

Good day to everyone. Took my JD 6620 out for a trial run on my beans. It looks to me that I am losing a good number of beans out of the back of the combine. I have set the combine up using the spec's that are in the operators manual. The beans in the tank look good and clean with a few pods that suspect I caused when I left the thresher engaged with the engine idling.
I am not sure if my fan speed is to high or if I need to adjust some other settings. I used this combine on corn last year with good results.
This is my first year with beans and I need to learn a lot about harvesting them.
If you can offer some advice on adjusting my machine I will be appreciative.

russ1 · Oct 25, 2014

Fan speed may be too high and or sieve setting not open enough.

JMS/.MN · Oct 25, 2014

Beans typically blow out a bit easier than corn. Mike Aylward seems to be the JD combine guru here, and suggests that the start settings in the book are not always so correct. Generally, if you"re getting a perfectly clean sample in the tank, you"re losing some good grain that"s worth keeping.

todd hamilton · Oct 25, 2014

You most likely will need to adjust the combine every day and/or every field. Catch a sample when you first open a field (1/2 way first round) get about a gallon of beans. Shut the combine completely down and check the sieves buy pouring beans on top of them, open or close as needed you want them to just drop through. Then start back up and watch the tank as you adjust the air. Then on you next pass watch the ground where not yet harvested for grain on the ground where combine has passed. You can also walk where you have harvested and look on the ground. Don't go exactly by combine recommended settings those are for seed genetics 25 years old. New bean variety vary greatly in size and weight depending on recent rains and overall growing conditions. I have combined $3.00 beans many times in the past so I wouldn't leave $9.00 beans on the ground. I ran cousin's 6620 and then 9400 for over ten years. The 6620 is one of the best combines ever made.

2underage · Oct 25, 2014

Thanks to all who posted a reply. I will take your good advice and adjust my machine as suggested by you all. I will learn how to use this JD 6620 in beans and I understand the reason that I should check the machine many times each day.
I do like the 6620 and I just want to use it properly and profitably.

coonie minnie · Oct 25, 2014

Make sure to look behind where the head has cut, but not where the back of the combine has passed, too. This will give an indication of what's coming off the head.

Also good to check what's coming over the walkers if you are running a straw chopper. The chopper can mask a poor threshing job. We bale all our bean straw for bedding, so don't have to worry about that end! Unthreshed pods are easy to spot when the haven't been through the chopper.

2underage · Oct 25, 2014

Right, I do have a straw chopper and I was wondering if the chaff that I was seeing behind the combine was hiding unthreshed pods. Thanks

todd hamilton · Oct 25, 2014

If you are seeing beans still in the pod close the gap and speed up the cylinder a little. If you start seeing split beans in the tank you went to far.

todd hamilton · Oct 25, 2014

Beans in the pod blow out the back real easy

Mike Aylward · Oct 27, 2014

First of all, determine where your losses are coming from. If you have losses out through the chopper you are not threshing enough. Tighten the cylinder/concave clearance and/or speed up the cylinder. If you are loosing beans over the chaffer odds are it's because you are running TOO LITTLE air. The chaff should float off the chaffer and never touch it. If it does, it WILL carry beans with it. To determine if you have the air set right look right behind your left foot at the tailings return elevator. There should be a little bit of chaff and seed but not much of either. If you are getting lots of clean grain you either are running too much air (which, by the way, is VERY hard to do) or else the bottom sieve is set too tight, allowing the beans to carry too far to the rear and falling in the return. Run the chaffer about the width of your index finger and your sieve about the width of your little finger to start. If you are getting too much trash in the tank close the bottom sieve a little at a time. Hope this helps. Mike

JD 6620 in soy beans

2underage

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russ1

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JMS/.MN

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todd hamilton

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2underage

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coonie minnie

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2underage

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todd hamilton

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todd hamilton

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Mike Aylward

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