Combine capabilities

VADAVE

Well-known Member
Currently I have a 1978 JD 4400 that has worked very well for the amount of ground I have to harvest however since I have retired and have a little more time and a little help we are thinking of stepping up to a little bigger machine. Looking at a 7720 and I know bigger barn and new/bigger heads. But that not the question: With the 4400 in wheat I speed up the cylinder to 900 or 1000 rpm and it works fine, for corn/soybeans cylinder speed id between 300 and 600 rpm. Most of the 7720s I've seen say they're corn/soybean machines AND I just had a guy tell me he ran with that in wheat. So the question is can wheat be harvested with a cylinder speed for corn/soybeans?
 
Those models will have a setting for wheat as well. Corn/soy machines usually have a few extras over the standard model, but will harvest most crops. Check the manual. Ben
 
You will still need to slow down for beans and speed back up for wheat. Should set up pretty much just as your 4400 did. OP Manual explains it very well and is certainly easy to do. Good luck, you'll like a good 7720.
 
Yes,a 7720 will do wheat/small grainShould do anything your 4400 did,only faster..The cylinder speeds are fairly universal between different models.Buy a book,read it and set it by the book.
 

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