JD 55 with 343 cracking cobs

Got a chance to run the 55 in corn, had the concave all the way open and still have a lot of little pieces of cob on top sieve, not very many whole cobs on the ground or on the walkers, do not have any cylinder filler plates to put in, thanks
 
Anybody tell me what notch they have there lever in, probably have it too far open but it was stuck closed and that was no good, thanks
 
The concave on a 55 is adjustable on the back end, too, and I'm guessing yours is set too tight. The backside adjustment is done with a wrench- there is an eyebolt on either side, and a very small door on each side to see the gap between cylinder and concave. Look more or less behind cylinder bearings for the eyebolt and door.

It has been a long time since I had to adjust this on an 05 combine, so I'm sorry I don't remember the correct clearance for corn. A rule of thumb would be so a shelled cob can roll through between bar and concave though. Do you have a manual? I'd try to obtain one- they are a must for a combine.

Good luck and have fun.
 
(reply to post at 05:53:16 11/02/18)

Hey joe
We had some cobs that were kinda rubbery
They come apart easy
Maybe part of your problem
Check back of concave
Also if you are open to wide the cob tries to
Fold up instead of rolling thru
Good luck
 
IIRC,the front should be 1 1/4" gap. The rear should be 5/8 or 3/4" gap.This is only a guideline. Atuual may vary.Cylinder speed between 400 to 600 RPM. the wetter,the faster the cylinder spins.I usually run 437 for dry(15% below).Filler plates are really not necessary,unless the corn is very wet.I've never had filler plates in my 95,never been an issue. As was said,you need a book! ASAP.A combine is too complicated to just wing it. Especially for a 'newby'.
 

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