KA6 Coal won't go down hopper

Moved into a home with a keystoker last year and it worked fine. Started it up this year and noticed that the coal won't go down the hopper. Red circle bar moves up and down, blue turns but yellow won't move at all. I assume the yellow circle is supposed to move the coal down but I don't have a clue. Called some people up and they told me to spray wd40 and try to free up the green area but I've had no luck. Any help would be appreciated.

Check and make sure all of your set screws are tight on the shaft. Worst case you might have a broken shaft.