Jump to content

Recommended Posts

Posted

I've lost the cap jewel (NH36) that goes in the barrel/train wheel bridge. Seiko doesn't specify the part number, it looks like it's part of the bridge.
Any idea where I could get a replacement?

Posted

Best is to get the cheapest 7S26 "for parts" and take it from there,  that will give you more parts as well.

Posted

@jdm Hi jdm, is there a short list of parts that are (or are not) compatible between the NH and 7S series? Also, what do you think of the reliability between the NH35 and the other major Japanese and Swiss movements. Thanks.

Sent from my SM-G975U using Tapatalk

Posted
10 minutes ago, jdm said:

Best is to get the cheapest 7S26 "for parts" and take it from there,  that will give you more parts as well.

I take it the jewels are not readily available.
First time trying to install the shock springs, lost both jewels.
Not a good day.

Posted

Hi Peter  I have attached the Series 3X  tech guide and the NH36 tech sheet. The Tech guide has all the parts and the oiling plus assembly information   hope you find it useful.  jdms suggestion of sourcing bits from ebay may be the best course of action of see If you can lay you hands on a Bombay special from India or check out cousins uk.       cheers

Seiko NH36 (1).pdf Seiko NH3 Series.pdf

  • Like 1
Posted (edited)
13 minutes ago, PeterS said:

First time trying to install the shock springs, lost both jewels.

These are best left alone, lubricate from outside with a very fine pin applicator. 

Edited by jdm
  • Like 1
Posted
6 minutes ago, watchweasol said:

Hi Peter  I have attached the Series 3X  tech guide and the NH36 tech sheet. The Tech guide has all the parts and the oiling plus assembly information   hope you find it useful.  jdms suggestion of sourcing bits from ebay may be the best course of action of see If you can lay you hands on a Bombay special from India or check out cousins uk.       cheers

Seiko NH36 (1).pdf 892.16 kB · 1 download Seiko NH3 Series.pdf 1.77 MB · 1 download

I've been using this sheet for oiling, it's the 13-2 and no. 13 is the barrel bridge. Looks like a scrap S726 will be my option as there is no part number so I can't search for it on Cousins website.

Posted
8 minutes ago, jdm said:

These are best left alone, lubricate from outside with a very fine pin applicator. 

I cleaned them and I was going to oil them with the 1A oiler.

  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • If the watch is new, just return it to the seller for a refund or replacement.
    • Keevo, Welcome to the group ! I'm thinking that you have some damage to the hour, and/ or minute wheel. Possibly just a bent, otherwise damaged, or missing tooth.   Your photo didn't post that I can see. I think you'll have to open it to start really finding the issue. Best, Randy
    • An industrial break cleaner , like Holts does a good job of rinsing off paraffin 
    • In cap jewels on several watches I have serviced over the years. I've recently serviced a couple of Longines movements where the cap jewels were colourless. They are a real pain. Without colour they disappear when immersed in any liquid for cleaning 😲 Not necessarily. Cousins do a 10ml bottle for £26 which will last me for years. That's just half the price of a simple Bergeon silicone cushion, so not too expensive 🤣
    • I wanted to post an update as I have two movements running really well now, 230-250 amplitude , 0.5 and under beat error, and +/-8 seconds or so. I removed the hairspring assembly in order to start over and noticed that the terminal curve between the stud and regulator arm was distorted. The stud was lower than it should be. I massaged the curve to look pretty good and reinstalled it. I followed Alex's video advice, best I could with 10x magnification, and with the regulator arm set in the middle of the curve I adjusted the stud so the spring was centered. I then made sure I could move the regulator arm the entire terminal curve without upsetting the coils. I then put it back on the Timegrapher and began closing down the regulator pins until I saw a change in amplitude which means to me that the pins were now pinching the spring. I opened them slightly and it looks good except I have a 0 on dial down, +3 on dial up but -16 on crown down.  I'm a bit stuck on how to adjust out the positional error. I also noticed a drop in amplitude, 180-200 on crown down. In the other video link I posted at about minute 26 if I remember he adjusts out positional error by manipulating  the regulator pin gap. With crown down the hairspring falls away from the pin and the rate slows so he closes the pins a bit to keep them tighter in crown down position. That means the spring is tighter on dial up as well but then he moved the regulator arm to slow the movement.  There must be some Seiko experts here that have some methods for dialing out positional errors. 
×
×
  • Create New...