Seiko 7005 Strange Assembly Issue

[clockboy]

hi chaps,

Got a real strange assembly issue that has got me stumped with a Seiko 7005. The movement has been serviced etc and works a treat. However when fitting the bezel on it stops the watch. After many dis-assembles I found that the minute/second hand pivot is actually rubbing on the glass bezel. I have attached some pics which show the glass with the mark that the pivot it is leaving. I am wondering if there should be a shim but there was not one when I stripped it. 

 

[WillFly]

Just a thought - is the pivot sitting positively in the movement. It probably is, if the movement's functioning OK, so that may not the answer.

 

The other question is, of course, is - is the glass original? Ought it to be more domed?

Edited October 13, 2014 by WillFly

[clockboy]

Thanks for the reply Will.

 

I think it is all original including the glass. The movement is really running really sweet so I doubt if the pivot is not correct. The second pic with the arrow shows the ridge that the bezel & glass snap onto & I am thinking perhaps a shim goes their but not much height for this so I have my doubts.

The dial and movement is flush with the case so this looks correct too. I have a Seiko drawing of a Seiko 7005a and no shim shown.

A real brain teaser this one !!!!!

[Marc]

Check the seating of the movement within the movement spacer/mounting ring (is the ring the correct way round?).

Check the seating of the movement ring within the case.

Check that the seconds hand is fully seated on its post.

Was the watch running before you first removed the crystal? If not then maybe someone fitted to shallow a dome as Will suggested.

[bobm12]

In addition clockboy, if the watch was not running when you got it, and the mark on the crystal existed, they my have changed the seconds hand and pinion by one with a different length. Sometimes similar movements are used as donors and I've seen the 7XXX family of Seikos being used back and forth without regard. Example: cousingsUK lists two different lengths for this part for a 7S26/36 movement.

 

By the way, here are the specs for your movement:

 

 

7005A.pdf

[clockboy]

Thanks guys,

I have had this watch for while, so my memory is a bit vague. However as a matter of habit my starter for 10 is always before I take the back off any watch I pull out the stem and give the hands a spin. I am sure I did this and this function was OK but it was not a running watch. What happens now is the glass locks the hands so either I have something back wrong or there was a seal of some sort between the glass bezel and the watch case. When I stripped the watch there was some sort of green stuff that I scrapped off the glass bezel. I was just thinking how does this sort of watch stop damp getting in to the dial area without a seal as the fitting does not seem a tight fit. If it is not a missing seal then it is a complete strip down again to see what I find but it is running really well which indicates it is assembled correctly. Marc mentions the movement ring but this one is flat so either way round it fits. I might try a thin piece of card under the bezel to see if this helps. If it does a work around will be to fit a better domed glass.

Time is not on my side with this as baby sitting duties tomorrow. 

Thanks again guys for all you input very much appreciated.

Edited October 13, 2014 by clockboy

[Blacklab]

Was this an issue before you stripped the watch? I have found that some of the pattern replacement crystals are not the best fit. Or it could be that the wrong crystal has been used in the past. It looks like a 7005-2000 which should use a 340N05AN00 crystal. Fleabay has both a 340N06AN00 and a 340N03AN00 the correct crystal is also available elsewhere. The first 3 digits relate to the diameter & both would fit. However the second 2 digits relate to the serial number, which I believe in turn relates to the thickness and height of the crystal. More can be found on the file attached.

 

Seiko Crystal Codes.pdf

Edited October 13, 2014 by Blacklab

[canthus]

Hi Clockboy, Have a look here re Seiko cases etc whether seal required.

 

 

https://www.scribd.com/doc/24481322/STWG1-00-Common

[clockboy]

Thanks Blacklab & Canthus really useful downloads. I think it might be simply a crystal issue but I am sure the hands were freely turning before I stripped down this watch. So I will fiddle again but not until a few days time.

[anilv]

Look into the hole where the stem goes... is the hold exactly centred? If yes then its a crystal problem. If no then somethings wrong with the spacers/movement ring.

 

Anil

[clockboy]

Thanks done that a few times. The ring you mentioned is the ring that goes around the movement that has a flat section & that is for the stem area.

Should there be another spacer

[canthus]

My link above shows all the case components including rings, seals, gaskets etc for each type of case by case type (screw, snap-on, one piece etc).  If you have the case number you should be able to find the components.  You will need to look elsewhere for part numbers (Cousins, etc).   Looking at 7005-XXX cases they appear to have ring+seal/gasket; ring+gasket+seal or tension ring crystal with no seal or ring!!!!  Hope this helps.

[anilv]

looking at your pics again.. question.. did the movement come out the front?

 

Anil

[clockboy]

No  conventional removal.

[clockboy]

Ok it was the crystal see pic below. The genuine Seiko crystal (wrong size) is the one on the left the bad boy on the right.  Thats the good news however thought I had found a fault and attempted to attach the bezel again and bent the "sweep second hand wheel pinion" .

I have found a pinion for a 7005A hoping it is the same spec or the watch movement could be history.

 

 

Edited October 15, 2014 by clockboy

[Geo]

That's good that you have resolution, there's nothing more annoying than mysteries. Pity about bending the pinion though.

[clockboy]

Thanks Geo to say i am cheesed off is an understatement. i should have followed my gut feeling. As I stated in a previous post, I normally give the watch hands a spin before anything else. However i obviously did not do this with this watch, it would have saved so much time if i had.

Willfly suggested the crystal might be a problem at the beginning of this.

Totally fed up now going for a walk to calm down!!!!!

Edited October 15, 2014 by clockboy

[WillFly]

Sorry to hear of your toil and trouble! I'm sure it'll get sorted eventually. :pulling-hair-out:

[clockboy]

Thanks Will,

This dam watch has become a nightmare. Glass arrived today from Cousins but to high a dome just re-ordered.

No profit with this one, but if anything lessons have been learnt. 

[Geo]

That'll be another long walk then? By the time you get this watch fixed you'll be fit as a fiddle!

Edited October 16, 2014 by Geo

[clockboy]

Thanks !!!!! Would be nice to have a clearer schematic re-glasses so we know exactly the difference between all the variety of shape let alone material they are made of.

Edited October 16, 2014 by clockboy

[bobm12]

Don't worry clockboy, once in a while you get some UFO called watch to fix! I will probably do the same, walk it off, I'm getting too fat and I have many small, round reasons that tick, to walk! Hang in there!!