Posted by Bob on May 29, 2016 at 13:55:03 from (64.255.159.192):
In Reply to: jd 6400 hydraulics posted by stoneridge on May 29, 2016 at 13:37:27:
NOT sure what you have going on, but the coupler bodies threaded into the valve can fail internally making it seem like the actual SCV is not working, when actually it's just a coupler body issue.
If it is NOT simply a coupler body I suggest NOT tearing into it without having a factory service manual at hand, and followung the troubleshooting procedures it suggests.
Also, be aware that there are "valve discs" or "dime valves" between each section of the valvestack that can get lost, get out of place, or get where they can do damage.
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