nc ks | Thanks to all who have been helping me with the air drier on our 4940. From what I can tell, this will apply to all JD sprayers with an air drier, at least 40 series and older. As another NAT'r has posted, the air drier is a SKF Brakemaster Turbo-3000 and the desiccant filter is a T334. Napa sells them as a CR T334 for $50 cheaper than Deere. Here is a link to info on the Turbo-3000 with a parts list and some troubleshooting info. Starts on page 84.
http://www.skf.com/binary/30-64725/457938.pdf
Ours was not purging out the bottom through the purge valve like it was supposed to. It was constantly trying to purge out the side through a relief valve. We took the purge valve apart and there is a plastic plunger in there that is broken. We are going to try a purge valve kit and a new desiccant filter and see if that fixes it. Went ahead and got the purge valve kit from Deere to speed things up. ($153). Don't know if that can be sourced from Napa or not, but I am sure it can be sourced somewhere for south of fifty bucks probably. Will let you know how it comes out.
Edit: Deere wants over $1300 for the complete drier. Also, don't try to use a filter for the more common turbo-2000, they are totally different internally.
Edited by kb ag 5/18/2016 19:32
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update on JD sprayer air dryer troubles
