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PC-Magician

Seiko 7s26A Service

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Just started on this new project.

Seiko 7s26A SKX007 the very best movement variation the A version is pretty much bullet proof if looked after properly, but sadly this one needs some TLC to put it back on top form.

No idea who worked on it last but they did not do a fantastic job.

The work begins.

Seiko-7s26-A.jpg

Rotor Off and what the red stuff is I have no idea.

Maybe Jam.

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Movement out of the case.

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Hands off.

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Dial off

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A few steps jumped

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Canon pinion needs to come off.

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Train side of the movement,

Some parts already off.

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Pallet bridge removed.

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Barrel and trainwheel bridge off.

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A bare mainplate.

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Only bad part that is obvious is the click.

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I will replace it as it is an important part and if I clean it up the metal will be thinner and not a good idea for this particular part.

 

More to follow if any interest?

 

Thank you.

 

Jon

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Excellent stuff, I love reading these restoration threads, well played so far that man :notworthy:

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19 minutes ago, Pete wilding said:

Good stuff Jon,please keep us posted

Another good man responded thank you and I certainly will.

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well done john it looks like whoever oiled it up last time was used to doing oil changes on a 1976 Jensen Interceptor lol 

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1 minute ago, Nigelp said:

well done john it looks like whoever oiled it up last time was used to doing oil changes on a 1976 Jensen Interceptor lol 

That pretty much sums it up.

Wrong oil in some places and none in others you really could not make it up.

Read the Tech Guide chaps its not that difficult.

6 minutes ago, Nigelp said:

well done john it looks like whoever oiled it up last time was used to doing oil changes on a 1976 Jensen Interceptor lol 

Thanks Nigel it is appreciated.

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19 minutes ago, PC-Magician said:

That pretty much sums it up.

Wrong oil in some places and none in others you really could not make it up.

Read the Tech Guide chaps its not that difficult.

Thanks Nigel it is appreciated.

you are very welcome keep up the excellent work mate!

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2 minutes ago, Nigelp said:

you are very welcome keep up the excellent work mate!

Thank you.

I hate bodge jobs not my style at all.

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Well done Jon :thumbsup:

Can see “York Watch Servicing” been resurrected very soon :whistle:

Keep up the good work and the posts :clap:

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17 hours ago, Markybirch said:

Well done Jon :thumbsup:

Can see “York Watch Servicing” been resurrected very soon :whistle:

Keep up the good work and the posts :clap:

Its an Idea Mark but I have a lot to learn

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Found a replacement barrel arbor as the current one is very slightly worn, I could get away with the worn one but aiming for perfection.

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2 hours ago, PC-Magician said:

Its an Idea Mark but I have a lot to learn

Well you seem to heading in the right direction Jon :thumbsup:

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A little update.

I have found a major problem with both top and bottom barrel pivot holes which have major wear and also the Balance has issues so these need to be attended to, this means delays with progress as these issues will take a bit of time to sort out.

Anyone have spares?

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When I did some repairs to a grandfather clock, I was able to re-bush some worn pivot holes with brass bushes which were rivetted into place then broached out to the correct size. Now obviously a watch is a lot smaller than a clock, so is rebushing an option? (I don't know if it can be done, that's why I'm asking). Or can the holes be shrunk using a staking set?

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4 hours ago, Roger the Dodger said:

When I did some repairs to a grandfather clock, I was able to re-bush some worn pivot holes with brass bushes which were rivetted into place then broached out to the correct size. Now obviously a watch is a lot smaller than a clock, so is rebushing an option? (I don't know if it can be done, that's why I'm asking). Or can the holes be shrunk using a staking set?

Possibly shrunk which I had some help with on another Watch but it tends to be frowned upon, bushing is another possibilty as is jewelling.

 

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1 hour ago, PC-Magician said:

Possibly shrunk which I had some help with on another Watch but it tends to be frowned upon, bushing is another possibilty as is jewelling.

 

Yes...I'd heard that shrinking holes in clock plates by punching was frowned upon as it's regarded as a bodge. I guess the same is true for watches.

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2 minutes ago, Roger the Dodger said:

Yes...I'd heard that shrinking holes in clock plates by punching was frowned upon as it's regarded as a bodge. I guess the same is true for watches.

Not easy is it.

I certainly have a lot fo respect for Watch and clock repairers who do this as a living.

 

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4 hours ago, PC-Magician said:

Not easy is it.

I certainly have a lot fo respect for Watch and clock repairers who do this as a living.

 

It's certainly easier when it's a clock! This was a bush I fitted into the rear plate of a the clock I mentioned above before riveting and broaching.

large.clockpics022.jpg.c7c8d02863f53f6113fd75823ec8eb21.jpg

Broaching the rivetted bush.

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Finished bush with oil sink.

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