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Seiko 7005-8020: Movement Gasket And Ring Stuck

masviken
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masviken New Member

masviken

Posted
Posted

Hi guys,

 

Im servicing a really grimy Seiko 7005-8020 watch, and after finally getting the corroded case back off (used the classic superglued screw-nut trick) I'm stuck at the movement rubber (plastic?) gasket and metal movement ring. The just won't move. Two questions:

 

  1. Is there a trick getting the gasket off? It seems fairly hard, if I try to pry it it will probably break.
  2. Is it easy to source new generic gaskets for Seiko watches? I need both flat and round plastic and silicone gaskets for my ongoing projects, is it OK to just replace them with something similar of the same size? 

post-1123-0-06237600-1433330143_thumb.jp

ro63rto Distinguished Member

ro63rto

Posted
Posted

Looks like you may have pick out the old movement gasket. It will likely fall apart but replacements are available even if not from homological sources.

This is what the Seiko Case Guide shows for a 7005-802x

Screenshot_2015-06-03-14-36-46.png

Geo Distinguished Member

Geo

Posted
Posted

It will likely fall apart but replacements are available even if not from homological sources.

A bit of algebra required?

ro63rto Distinguished Member

ro63rto

Posted
Posted (edited)

A bit of algebra required?

[emoji1] Bloomin' auto correct.

H O R O L O G I C A L

NOT what appeared above.

Edited by ro63rto
masviken New Member

masviken

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Thanks for the help guys, I ended up carving it away piece by piece with a sharp blade and got the movement out. I have to say, the 7005 calibre is surprisingly different from the 6119 and 6309 movements I have worked on previously. Now I just have to find the right crystal and gaskets, too bad the Seiko Case Guide (awesome tip btw, saved the PDF) doesn't specify correct dimensions for crystals :) 

Blacklab Distinguished Member

Blacklab

Posted
Posted

Crystal should be - Seiko 310T11ANS0 or Sternkreuz XAC311.624. Gasket - Seiko FH2920B03.

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Lawson Super WRT Addict

Lawson

Posted
Posted

I've found the ultrasonic cleaner often removes the gasket in one piece, or complete destroys it ... one or the other.  But in saying that, crown and caseback seals should be replaced when they get to that stage of their life, trying to save them is fairly pointless.

 

Seals are cheap, repairing moisture damage is not.

  • Like 1
masviken New Member

masviken

Posted
  • Author
Posted

Thanks! I found the correct crystal on Cousins, searching on the reference number helped. I also found this scan that I saved as a PDF, where all older Seiko references are listed with the corresponding crystal ID number. Maybe there should be a sticky file section and/or a Seiko sub forum?

 

Time to order some new gaskets and crystals for my Seiko projects!

Seiko Crystal Guide.pdf

ro63rto Distinguished Member

ro63rto

Posted
Posted

I've found the ultrasonic cleaner often removes the gasket in one piece, or complete destroys it ... one or the other. But in saying that, crown and caseback seals should be replaced when they get to that stage of their life, trying to save them is fairly pointless.

Seals are cheap, repairing moisture damage is not.

In his situation, not a good idea as dial and date wheel still mounted as movement still inside case.

We all know what happens to date wheels in an ultrasonic cleaner don't we [emoji6]

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