well I have two TC if you take the base plate of and gently touch each part with a metal probe there will be a Klunk and the cycle will complete.
I cheated and fired the working one with the base plate off so I could visualize how it should work
The only thing I can recall is that the part to nudge is near to the part with a roller at one end.
Neither of mine has any wear or corrission I added some lube gel. Not got either to hand to help more.