Yes, The purpose of that return line is it drains low oil pressure off the back of the pressure regulating valve to keep it from Hydraulic locking, or not letting the valve work because of oil build up behind the valve sleeve #14
Re: Tim S Return line switch 4020/4010 steering valve in reply to jonwymillj, 08-23-2014 07:21:43
Your Welcome.. When Deere went with the 4020 they drained the valve down through the steering valve return circuit,,It made foe a nasty spot to get to, and that plastic line gets old and brittle causing a drippy leak in that area..
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