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Old 06-28-2012, 09:19 AM   #1 (permalink)
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Default deere s680

i have a new s680 running with 40' macdon draper in tough wheat conditions and seem to have a feed issue at the front of machine in the feed accelerator area. drum in lowered position, feed accelerator on fast speed, large sprocket on feederhouse drive,has small wire concaves, running concave on 14 and rotor speed at 1000rpm's.customer harvesting soft red winter wheat at 12-14% moisture , 80-90 bushel yield at 3 to 4mph. this s680 has a standard rotor with custom cutter option,not a rice machine and the issue is that the machine has a rumble in the feederhouse- feed accelerator area pretty consistent all the time and when crop toughens in evening seems very evident. customer had a 2010 9870 with same header on it and did not have this problem. trying to figure out what is different about the s680 to cause this issue.
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Old 06-28-2012, 06:07 PM   #2 (permalink)
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Have you tried feeder house or feed accelerator in slow speed. It might be backfeeding.
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Old 06-28-2012, 08:53 PM   #3 (permalink)
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I would start by putting the feeder and accelerator in slow. I don't remember if the Mac Don center canvas speed is adjustable. The center draper and feeder chain need to run at the right speeds to get things to feed right. The header speeds would have needed adjustments as I think Case and Deere drive shafts run at different speeds.
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Old 06-29-2012, 02:08 PM   #4 (permalink)
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And be sure the header is adjusted right looking at your feederhouse. In this situation try setting it smaller than your feederhouse is wide, Crop maybe bumping against rotor intake at thee sides. With rotor machine this is different than conventional one
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Old 06-29-2012, 04:05 PM   #5 (permalink)
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Out of curiousity, how fast do you expect this machine to run in the conditions you presented?
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Old 07-02-2012, 06:00 PM   #6 (permalink)
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Go to small sprocket on feederhouse drive. Keep accelerator in high. My 2c.
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Old 07-06-2012, 10:26 AM   #7 (permalink)
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Are you recommending high speed setting on the feederhouse? That has never worked well on our 9870s, the older 70 series had a high capacity feeding package that really made a difference in feeding. Maybe the customers original 9870 had it and the 680 came without?
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Old 07-06-2012, 02:46 PM   #8 (permalink)
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No I think small sprocket is slow speed on feeder house, but our experience is to keep accelerator on high. Tried it on low like book recomends for flax-definitely did not work
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Old 07-07-2012, 05:32 PM   #9 (permalink)
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Have a 9870 with a 35' MacDon FD70 and had similar problems. We replaced the hydraulic pump on the header and it corrected it.
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