7A38-7080 restoration

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SoCal84
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Joined: Thu Nov 25, 2021 3:32 pm
Location: Alpine, CA, USA

7A38-7080 restoration

Post by SoCal84 »

Looking for a replacement bezel ring for a 7A38-7080. also need to know if the click ball is stationary or is it spring loaded. Mine appears to be fixed.

I found a new bezel gasket SKU:0Z3404B02 on watchmaterial.com it fits.
Seiko Bezel Gasket for
7A38-7080
5H26-7A00
5H26-7A09
5H26-7A10
5H26-7A19
5H26-7A1A
H556-5020
H556-5029
H558-5010
Y147-9000
7A28-7049
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Seiko7A38
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Re: 7A38-7080 restoration

Post by Seiko7A38 »

Hi, Paul.

As you can see I've moved your thread from where you'd originally posted it in the 7Axx General Discussion area to the Workshop forum area. I wasn't sure which was the more appropriate section: here or Parts Info, Tech Tips and Tinkering.

Anyway to answer your questions. When you say 'replacement bezel ring', I'm assuming you mean the bezel Insert, as yours looks typically worn. Harold Ng of Yobokies produces an excellent quality aftermarket insert to fit the 7A28-7040, -7049, 7A38-7070, 7A38-7080, etc. The price is $30. See: https://theyobokies.com/?mod=product&se ... tail&id=89
Quite a few of us have used them in restorations (mostly in 7A38-7070's). See page 3 of this old archived forum thread.

The click ball should definitely be spring loaded, not fixed. It may have seized. Worst case, with continued use, it will wear a groove in the bezel track, like this:

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SoCal84
Posts: 2
Joined: Thu Nov 25, 2021 3:32 pm
Location: Alpine, CA, USA

Re: 7A38-7080 restoration

Post by SoCal84 »

Thanks for the Yobokies tip, I am waiting on order confirmation to complete purchase.

So far I have purchased:
NOS Seiko Crystal 310W64GN00 e-bay seller from the Philippines,
4 Seiko Pusher Button Stem Seals EC0060B01/A from e-bay seller from Lincolnshire UK
Seiko Bezel Gasket H556-5020 7A38-7080 From Watchmaterial.com
Seiko Case Back Gasket Original Divers FH3180B0A From Watchmaterial.com

Still need the crystal gasket if anyone has the Seiko part number or knows where to find one I would greatly appreciate it.
Also looking for a Sapphire crystal replacement if available.

Started dabbing the click ball with AeroKroil using a fat oiler, hoping to get it to release, no groove on the bezel so hoping to get the ball freed

When I first received the watch the owner indicated that it had not worked for over a decade and that the last watch shop said it was not repairable. Upon initial inspection I noticed that the friction spring for the second counting wheel was off center with the edge rubbing against the pivot. I re-adjusted the spring, oiled the exposed jewels and pivots and installed a new battery. adjusted the chronograph hands (the Seiko parts manual is an excellent resource) and it has been running great.

As an amateur mechanical watch enthusiast I have not worked on quartz watches with the exception of an occasional movement replacement for a family member. So I am very reluctant to do anything else to this movement.

Any suggestions are welcome.

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Seiko7A38
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Re: 7A38-7080 restoration

Post by Seiko7A38 »

Paul.

The Seiko p/n for the nylon crystal gasket is 86565100 and they're still available. However, unless yours is damaged, I wouldn't recommend buying or attempting to fit one. The tolerances are extremely tight. If you look closely at your old gasket, you'll see it has a step on the inner circumference, where it was compressed by the old crystal. Hence it's a lot easier to re-use, than fitting a new one. I first advocated this little tip in the old forum's Crystals and Gaskets thread.
SoCal84 wrote: Fri Nov 26, 2021 4:06 pmUpon initial inspection I noticed that the friction spring for the second counting wheel was off center with the edge rubbing against the pivot.
The most common self-inflicted fault, bar none. ;) See: The commonest self-inflicted fault on 7Axx's ....

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