In the attached assembly the part PW-34 Link Rod needs to be free to pivot around the part PW-36 Pivot Pin (as it will be connected to a gear with an offset threaded hole). Which in turn moves the part PW-31 Pushrod back & forth.
I have gone through (2X) all the pertinent parts in the assembly and suppressed the mates for each, tried to get the part PW-31 Pushrod to move without any luck.
What am I missing?
The pushrod is Fixed. It can't move, even if there are no mates.
Right click some other component, such as PW-29 or PW-30 and 'Fix' it and then right click PW-31 and 'Float' it. then things will move the way you expect.