John Deere 6620 electric over hydraulic valves drip

andy r

Member
I have a John Deere 6620 sidehill with two electric over hydraulic valves. One for the sidehill feature (located on top of the front axle) and one for the dial-a-matic header control (located under the hydraulic reservoir). I notice that each one has slow drip on one side near where the solenoid attaches to the valve block. Has anyone ever rebuilt one of these John Deere electric hydraulic valves? Just wondered if it just drips if that is an easy fix such as an "O" ring under the solenoid or if the entire valve needs to be torn apart. If the entire valve needs to be torn apart how big of a job is it? Thanks.
 

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