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Can I use an adjustable 336 corn head on 30" rows?
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dertz19 View Drop Down
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Joined: 22 Sep 2009
Location: Minnesota
Points: 94 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dertz19 Quote  Post ReplyReply Direct Link To This Post Topic: Can I use an adjustable 336 corn head on 30" rows?
    Posted: 05 Sep 2025 at 11:07am
I understand these heads can adjust up to 2"? So that brings it down to 34". 330's are darn tough to find around me, but there's a 336 close by. This is on a K2.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21902 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 2025 at 11:48am
If your hybrids have the ear up off the ground aways, it would work as you can carry the head raised up a bit. You are bending the stalk inward, which is better than outwards. Certainly not ideal.  As far as the 2 inch thing.....a 4-38 head can be made 36 or 40. If it is truly 36 inches, the sheetmetal bolts should be in the middle set of holes.  It might be a 3-38 head ?? set to 36 meaning that's it.
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dertz19 View Drop Down
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Joined: 22 Sep 2009
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Points: 94 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dertz19 Quote  Post ReplyReply Direct Link To This Post Posted: 06 Sep 2025 at 10:29pm
Thanks for the input. Good point about raising up the header!
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21902 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 06 Sep 2025 at 10:30pm
I was wrong. You are bending the stalk outwards. Not a good thing.
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dr p View Drop Down
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Joined: 24 Feb 2019
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Points: 1405 		Post Options Post Options   Thanks (0) Thanks(0)   Quote dr p Quote  Post ReplyReply Direct Link To This Post Posted: Yesterday at 5:54am
i have done it with a two row head and its hard. With a three row head, the discrepancy is 18 inches. That won't work. Maybe if you only use two rows but i would keep looking
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AC7060IL View Drop Down
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Joined: 19 Aug 2012
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Points: 3533 		Post Options Post Options   Thanks (0) Thanks(0)   Quote AC7060IL Quote  Post ReplyReply Direct Link To This Post Posted: 20 hours 29 minutes ago at 6:28pm
Dertz19, yes as long as corn is standing good(no root lodged or stalk lodged).
Center drive 336’s middle row spot on & two outside rows are each 6” off centered but snouts should direct stalks into snap rollers. Maybe set cornhead sprocket drive to slower speed & pace combine’s forward travel for best results. Adjacent row(s) maybe get crowded away from outer snout’s rear fenders. Drive so cornheads left side slip-clutch’s metal cover/panel is towards harvested side. It sticks out about 6” from edge of fender.

Edited by AC7060IL - 20 hours 24 minutes ago at 6:33pm
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