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F2 rock door concave for corn and beans

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Jason n View Drop Down
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Joined: 05 Feb 2018
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jason n Quote  Post ReplyReply Direct Link To This Post Topic: F2 rock door concave for corn and beans
    Posted: 07 Oct 2023 at 5:24pm
Can I let the concave on the rock door of my f2 for corn and soybeans instead of removing it for corn and replacing it for soybeans??? What are any negatives of having it on the door all the time?
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DrAllis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2023 at 6:50pm
Only way I ever ran an F-series was 1-3-5 which means 1 is on the door for everything.
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AC7060IL View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC7060IL Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2023 at 11:30pm
Which cylinder rasp bars are installed in your F2?
-Standard 1/4” rib spacing?
-Or Aggressive 1/2” rib spacing?
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Jason n View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jason n Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct 2023 at 12:50am
I believe they are the standard rasp bars
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AC7060IL View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC7060IL Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct 2023 at 7:45am
Standard rasp bar is kind-of its “negative” that you ask about. It can thresh ok. But agressive rasp bars allow far greater capacities.

Anyway, with standard rasp bars try placing a “well worn” (1/2 as tall?) concave in door (#1 position) & leave it for all crops(corn,soy,cereal, etc).
F2 offers 6 concave positions. Like DrAllis says, use 1,3,5.

1,3,5 usually offers best results?
More importantly, what’s your F2’s other settings that you use for its cylinder heights & cylinder speeds per crop??

Edited by AC7060IL - 16 Oct 2023 at 1:30am
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SteveM C/IL View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 09 Oct 2023 at 12:42pm
The claim was that bar on door in corn causes extra vibration and wear on latch. Have done both and have no data to support claims either way. Maybe after thousands of acres?
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Jason n View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jason n Quote  Post ReplyReply Direct Link To This Post Posted: 10 Oct 2023 at 5:09pm
I'm running 20" pulley as fast as it goes (tach doesn't work) clearance at 1/4" later in afternoon I can slow cylinder down as it starts cracking beans
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