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Message: <blockquote data-quote="Haystack" data-source="post: 136864" data-attributes="member: 25378"><p>The block you speak of is a hydraulic diverter valve.  When in the relaxed or no power position it sends oil to the hydraulic motor for the sickle bar.  When you apply the 12v to the diverter valve it stops sending oil to the motor and diverts it to the hydraulic position piston.   With no power <12Vdc> to the diverter valve apply hydraulic presser and the sickle bar should run, if not you have a hydraulic issue.  The diverter is 12dc so check at the valve that you have 12v when the switch is on.   Now apply hydraulic pressure and the piston should move.   The direction is controlled by the directional valve on the tractor.</p></blockquote><p></p>