Nisshin Master extra part?

When putting my Nissing Master back together I ended up with an extra washer, one I think has to do with the motion work. I tried putting it a few places but it didn't work (it jammed everything up). It's the lone washer at the right of the picture.

I thought it was from the motion works on the center arbor, but the following works fine (from bottom to top): cannon pressure washer, cannon pinion, hour wheel, hour hand, minute hand, hand washer, hand nut.

I tried adding it under the minute wheel screw but no luck, it jammed the minute wheel.

Any suggestions?

 

Wayne: the lowest washer on the left sits below the cannon pinion, is this the one you are referring to? It keeps the cannon away from the plate.

And the second to top washer on the left goes between the minute hand and the hand nut.

The extra washer on the far right doesn't seem to fit anywhere.


Kurt: I'm coming around to thinking you are correct. The large domed washer came off the clock when I took it apart, but I don't recall it coming from between the two plates, I'm pretty sure it was part of the motion works. But of course the clock didn't run and now it does, so maybe best to leave well enough alone.

 

Kurt: it all seems fine, clock is running and seems to be keeping time correctly (at least at the few hour level).

Lightly tightening the hand nut seems to compress the pressure washer at the base of the cannon, lock the cannon to the center wheel arbor, and keep the minute hand on the end of the cannon. Making the nut too tight causes the clock not to run. So, not too tight, not too loose, somewhere in there it's just right!

Thanks for your help. This is the first 400 day clock I've worked on and I'm very happy to have gotten it working (two more to go). The help I got here was essential, as was the Horolovar book, Rabushka's book, and a couple of internet videos.