Max fert down one shoot - The Combine Forum

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post #1 of 15 (permalink) Old 05-15-2017, 11:07 PM Thread Starter
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Max fert down one shoot

Seedhawk icon 800 putting down 275 lbs of a blend of 46, 11-52, and sulpher. There are a couple long secondary hoses that plug even at that rate. 4.2 mph 70 ft machine. Fan is maxed out at 4300 with a stieger 550 twin pump. These drills should put down over 300 lbs no? I do notice that the manifolds are not centered on the section maybe due to wing folding reasons.

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post #2 of 15 (permalink) Old 05-16-2017, 08:21 AM
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Seedhawk icon 800 putting down 275 lbs of a blend of 46, 11-52, and sulpher. There are a couple long secondary hoses that plug even at that rate. 4.2 mph 70 ft machine. Fan is maxed out at 4300 with a stieger 550 twin pump. These drills should put down over 300 lbs no? I do notice that the manifolds are not centered on the section maybe due to wing folding reasons.
Just how much longer are they than the others on that tower?

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post #3 of 15 (permalink) Old 05-16-2017, 08:36 AM
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Not a SeedHawk guy but looks to me like the issue is fan speed. Increase it to 5000 and you should be ok and then you can increase ground speed.
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post #4 of 15 (permalink) Old 05-16-2017, 08:43 AM
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I have a 70' seed hawk drill. You're correct with the location theory of manifolds for folding, although a couple could be moved a bit, but may not gain much. I have mine on a Bourgault tank, with Bourgault secondary air kit. Takes big air, but can run 350 lbs. Bourgault fans respond different than seed hawk, and to do that our air is running 5700 - 6000 to move that amount of product. Outer 2 sections are prone to plugging due to length, but we are able to seed at 5 mph.

On the Case side of things, we ran a twin pump as well. Both fans off of second pump. Had Case turn pressure up to 3100 psi, factory is 28 - or 29 I think. Also we switched the 4 fan couplers to 3/4" replacing the 1/2" blocks on the tractor. It's an easy swap, and not that expensive. Might help.
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post #5 of 15 (permalink) Old 05-16-2017, 09:22 AM
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I would think that you should seriously think about pulling a nh3 tank .
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post #6 of 15 (permalink) Old 05-16-2017, 08:07 PM Thread Starter
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Longest one would be double the shortest one. nh3 not good option here but will entertain other ideas for next year like broadcast or banding. They tell me that 4400 is the most the icon 800 fans ever go no matter what tractor. Something about broadcasting seems stupid when you bought a 500 000 dollar drill.
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post #7 of 15 (permalink) Old 05-16-2017, 09:30 PM
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I wonder if its those blockage monitors with the 90 degree bends. Intelligent Ag update them this past year for a more straight through design.

My 84ft Seedhawk can easily run 350lbs of just fert and would never plug the secondaries, maybe the primary 2.5" if it was damp.

As a farmer, you learn quick: “You don’t get anything that you don’t work hard for”
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post #8 of 15 (permalink) Old 05-16-2017, 09:39 PM
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80 ft SH and 800 cart
Fert fan max rpm is 5500 on 2011 case quadtrac 55 gpm at most .
Maybe your hydraulics are not set to flow requirements.
Does your fan drops lots of rpm on headlands?
This whole tractor hydraulics is a joke , why send that much flow through tiny little couplers one mile behind pump .
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post #9 of 15 (permalink) Old 05-16-2017, 10:11 PM
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Longest one would be double the shortest one. nh3 not good option here but will entertain other ideas for next year like broadcast or banding. They tell me that 4400 is the most the icon 800 fans ever go no matter what tractor. Something about broadcasting seems stupid when you bought a 500 000 dollar drill.
That right there sounds like the issue. Your air is leaving out the path of least resistance. A few percentage points different may not make much difference, but 100% difference...........


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post #10 of 15 (permalink) Old 05-16-2017, 11:50 PM
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We have a Raven 800, double shoot, 60 feet 12 inch spacing. This spring we have applied 450 lbs total fertilizer per acre at 5 mph. Fan speed 5400 rpm. 2012 Quad trak. I believe you need to increase your fan speed.

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