Automatic Power Shift (APS) on Deere 8420 - The Combine Forum
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post #1 of 1 (permalink) Old 11-09-2006, 06:00 PM Thread Starter
Join Date: Oct 2006
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Automatic Power Shift (APS) on Deere 8420

I've been messing around with the APS feature on a JD 8420. It will downshift for me (say from 10th to 9th) but refuses to upshift (9th to 10th). I've tried everything and can't figure it out. Any ideas?

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