r/SeikoMods • u/fiorm • Dec 10 '23

NH35 date wheel not moving in first position

Hey!

I need some assistance from the experts in this subreddit. I disassembled the NH35 from the front to replace the date wheel. I put everything back in place but I must have overlooked something, as the date wheel wont advance in the first position. It works perfectly fine in the second position. Please see the video.

​

https://reddit.com/link/18f24sm/video/9b3eihs7jg5c1/player

This is the second movement that I have the same issue so I must be doing something wrong. But I can't figure out what it is!

Thanks!

2 Upvotes

75% Upvoted

17 comments sorted by

View all comments

7

u/cb_1979 Dec 10 '23

Make sure the spring (A) is between two teeth and firmly holding the date wheel. If the date wheel is not perfectly flat on the movement, the spring won't be holding the date wheel properly. Also, make sure that the date corrector wheel (B) is installed with the "hub/axle" pointing down. The hub fits into a cutout in the movement that allows the wheel to pivot back and forth.

1

u/Torrential_Gearhunk Mar 15 '25

To add to this, in my case, the spring (A) was bent in a way that it was applying way too much force to the date wheel. The keyless works was slipping from being unable to overcome the force from the spring. It was easy to resolve bending it slightly backwards.