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| Well, I’m going to look at the 4920 Saturday. I see on YouTube where techs use the brown box to diagnose and obtain some pretty pinpoint readings such as oil temperature and sensor voltages. While I know the basics as to what I’m looking for (thanks to all who replied earlier) can someone give me some insight into the brown box and how I can potentially use it to gain some insight?
Forgive me. I’ve never bought something this new or with this much potential to cost so much in repairs if I chose incorrectly.
As a side note, why would someone install a Raven controller in one of these? Easy enough to drop in a Deere 2630?
Edited by Josh4520 3/18/2026 22:26
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John Deere 4920 sprayer & brown box help