Seiko movement loose in case.

[Grandiloquence]

Hi folks, I recently received a Seiko 6309-7040 in a trade and upon setting the time noticed that the movement/dial shift slightly in the case when the crown is pushed in or pulled out. When the crown is screwed on there is no movement at all. Anyone got any ideas on what could be causing it to shift around?

Thanks in advance,
Chris

[Thewatchbloke]

It's probably caused by a broken or missing casing spring. The first picture is the movement casing ring and spring, the second is how the spring fits onto the ring.





The caseback screws down onto the spring and prevents any movement. If it's broken or missing there will be little support and will allow the movement to move slightly when the crown is unscrewed. When the crown is screwed in, the spring on the split stem pushes the movement and ring against the opposite side of the case and prevents any further movement.

[Grandiloquence]

Thanks for the detailed answer. Looks like I could try and tackle this myself rather than send it away. Now to track down a case spring I guess.

[Thewatchbloke]

Remanufactured ones are available on ebay, http://www.ebay.co.uk/itm/Seiko-Dive...item233db0bbb7

[Grandiloquence]

Blimey, this place is great! Thanks again, spring on order!

[Cirrus]

I had a 6309 once that rattled a bit... after a lot of googling I realised that ring - to left in the above picture - was in upside down. I think the movement and dial had been assembled with it between them - at least I think I had to take the dial off to seperate them.

[Grandiloquence]

Hmm. Got the spring today, fitted it in but although it's a bit better, there's still movement when the crown is out. It's definitely in the right way round :)

Any clue as to what else I can try?

[Marco-T]

Hmm. Got the spring today, fitted it in but although it's a bit better, there's still movement when the crown is out. It's definitely in the right way round :)

Any clue as to what else I can try?

Normally the spring should "tighten" the dial stuck between the case edge beneath the crystal and the caseback.
If it still moves, it means it isn't tight enough (not enough pressure), so you could bend the spring a bit to increase the pressure.

Edit: check the dial spacer as wel (the white ring which keeps the dail from getting stuck between movement and dial)



If it's broken (or the wrong one), this might be the problem as well. Also means that too much pressure (by bending the spring as described above) may cause the date wheel to get stuck.

[Grandiloquence]

Cheers for taking the time out to respond. I think it's getting a bit out of my comfort zone as I don't really have the tools or skills to start dismantling the movement! I have some photos so hopefully if something obvious is missing you could possibly tell?







Cheers
Chris

[Marco-T]

Alle seems to be in place and ok.

Does the caseback say 6309-7040 or 6309-7049?

Reason I'm asking, you can (for example) switch a SKX caseback with a Seiko 5 caseback (some do in order to have a seethrough back on the diver), however the Seiko 5 caseback has shorter thread, hence doesn't "push" the movement in please.

If it does have these numbers.... I'd say take the pliers out and bend the spring a bit so it sits a bit higher / closer to the case