[Conaway2]

This just happened to me - I managed to get the number stack apart - actually it was quite easy. My speedometer is a Waltham if that makes a difference.

Once I had the number wheels off, I used light (clock) oil on the internal gears and reassembled every thing, testing the stack as I added wheel to the stack.

I used silicone caulk to pop the odometer worm gear cover back on.

Check this link out for helpful info.

That was 150 miles ago and it’s still working OK.

Good luck !
Jim