Make a 6105-8000 pass a pressure test?
The crown seems somewhat ok, but I need a new crown gasket. I've read that you have to dismantle the stem from the crown and fasten it with a washer. I have no idea of where to get the washer or the crown gasket. Is it possible?
The case back gasket also seems a bit too wide, so a new back case gasket would also be good.
i think I've read most guides on the net, but none give clear answers to my problem.
I've had all gaskets replaced and pressure test within past five years on mine. It was done here in US for $75.00 so it can be done with parts that are still available. Just have to find the right place. I used Duarte from New England Watch Works (NEWW).
The crown on a 6105-8000 (and 8110) was never designed to be serviceable, therefore Seiko never supplied spare o-rings for them. The crowns o-ring is held in place by a washer and the crown body is folded (flanged/crimped) over the the washer to hold it in place. To remove the washer it has to be either destroyed or the flange has to be machined away. Once the washers off and the new o-rings installed, a new washer has to be fitted and re flanged in place. The other way is to machine a washer and crown so it's a friction fit, which is the most common way I've seen the job done. There are a few people that do this work but it isn't cheap, Jack at IWW does it, Randall Benson (Dr Seiko) has done a few and of course Duarte that Jim mentioned. You could buy a NOS crown and hope that the o-ring is still supple but after 40+ years of sitting in a parts store I wouldn't trust them to be sound, I have 14 NOS 6105-8000 crowns in the parts drawer and I wouldn't submerge any watch I fitted them to!
And this is how they can end up looking having gone through that process:Originally Posted by Cannop
As for NOS crowns, I agree completely with what Duncan has said. I once bought a NOS crown for a 62mas from Yahoo Japan, waited weeks, paid a fortune in excess postage/VAT charges only to find the o-ring was so hardened I could not get it to seat over the crown tube at all.
Martin
So basically I'm screwed unless I send a NOS crown to somebody that can fix it for me.
I talked to the Seiko service center rep for my parts of the world, and I he said they should be able to fix it , but he thought I might have to ship my watch to them. He also said that if they couldn't fix it with the crown I have, they'll find another Seiko crown to work as a replacement, but that it would be another type of crown.
I'm a bit curious to how the crown works.
Crown tube presses on the washer, that makes the gasket "come out" between the washer and stem?
Last edited by yonsson; 5th July 2014 at 05:40.
No, I wouldn't say that. There are NOS crowns available which have been stored properly and whose gaskets remain supple and so every chance to render a watch reasonably water resistance whilst keeping everything original. It's just that you may have to take your chances in finding a crown to do the trick.
The crown tube slides into the circular aperture in crown with the outer edge of the tube then pressing against the inner diameter of the rubber o-ring which is seated beneath the washer. The washer simply serves to retain the o-ring within the crown but its presence makes it impossible to replace the o-ring without prising the gasket out first. The way those chaps do it is to lever the inner edge of the washer upwards, working around the crown, until the washer is dish-shaped. Its effective outer diameter is then reduced and it can be removed, exposing the o-ring. The reverse process is then to press it back in from the summit of the dish, flattening it again and pressing its outer edge back into position. As you can see from my photo, that process may well cause some damage to the washer. In that particular crown, which was worked on by one of those specialist US watch smiths, the removal process also resulted in a dimple appearing on the outer face of the crown, somewhat spoiling its appearance.
A third option if you are determined to impart proper water resistance would be to have a trip lock conversion performed. I had this done on one of mine with decent results but of course you then lose a degree of originality.
Martin
Did you ever tried to create a new washer and pressing this new one in?
It amazing that it's possible to read every thread you can find about something on the net, then start a thread and learn more. :) Thanks for all the info!
What air don't get is that my crown doesn't look like the one above. At least I can't see a washer and gasket in it. Are there different versions? My watch is an early "water proof" from 1968.
I've read about the trip lock mod, but I didn't know it was possible for the 8000 model.
here are some pics. I can take it out and take better shots if you'd like.
The crown shown in my photo above is from a later 6105-8110 but the construction is basically the same as the crown used in the 6105-8000 and, indeed, the earlier 62mas. The only difference is that it looks as though the edge of the crown on the earlier watches is flanged over the washer, as Duncan said earlier on in the thread. In your photo, the flange and washer are indicated below:
I've seen a few 6105-8000's with the trip lock mod, all done i think by Randall Benson in the US.
Martin
Last edited by MartinCRC; 5th July 2014 at 22:09.
Thanks Martin! So there should be a gasket in there somewhere, I just can't see it. I'll take it out and have a look tomorrow.
I`ve just done a similar job today to rescue an old Omega crown. The washer was prised out, the seal replaced by an O-ring, the washer pressed back in then dished slightly to retain it. If the washer is a bit loose it can be 'spread' by tapping it lightly with a metal hammer on a metal surface. I used epoxy adhesive as a safeguard. Same principle, I`ve done this several times when the correct crown can`t be sourced.
Paul
I'd be surprised if you could prise the washer out of a 6105's crown and reuse it Paul, well without it looking like Martins example! They fitted very tightly and the washer is quite thick relative to its size, there's no chance of a loose washer with one of these.
Sounds like it'll be difficult; it usually works on old Omegas because the washer's thin. Sometimes I can get the old 0-ring out with an oiler and slide a fresh one in. The difficulty is finding the correct sized 0-ring.
Paul
I v been told by a diver that at 100 feet dept you would not be able to read your own name underwater let alone tell the time.
You shouldn't listen to sky divers.
That's only 30m .........
That's a subjective observation. Depends on the water off course. Here in Sweden, 2 meters is enough. :)
Rubbish.
I have been at that dept and was able to read my SMP without problem.
Same goes for the dive computer, the pressure-gauge for my tank and the compass.
Why would water behave different under more pressure?
BTW: diving in dirty water can create te necessity to take the watch close to your face.
Just like in a sandstorm.
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