Rear remote lever doesn't budge

[NHTundra]

Just added a snow blower with hyd. chute rotation to my TC35. Up until now nothing's ever been connected to the remote as far as I know. The lever feels almost solid. There's some slight movement in the mechanism but the plunger that goes into the valve body won't move in or out at all. There is some mild corrosion around some of the linkages but the plunger looks fine.
Could there be a locking bolt or something that I need to remove or unlock first?

 

[NHTundra]

Solved the problem. I used WD-40 over the course of 2 days. I then dissassebled the linkage to expose the plunger. I was then able to rotate the plunger slightly, then I tapped it with a hammer. Once it retracted a bit I re-assembled the linkage and cycled it back and forth. At first it remained where I left it but then started to revert back to the center neutral position on its own.