I don’t know if I can help with that. If I ever had that part apart, it was ages ago. But near as I can tell, you first have to remove the powerhead, then the pinch bolt, then pull the pivot shaft up and out.
Maybe this will help, I hope.
![SA-capture](https://www.aomci.org/wp-content/uploads/2019/02/SA-capture.jpg)
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This reply was modified 6 years ago by
frankr.