Seiko 7L22 Kinetic Chronograph Information?

[Endeavor]

I like to service a Seiko SNL007 kinetic chronograph which has a 7L22 movement.

 

Has anybody an "exploded view", service & oiling manual or is aware of a walk-through of this 7L22 movement?

 

Thanks on beforehand;

 

Roland.

[ro63rto]

This should be what you're after.

http://watchguy.co.uk/technical/Seiko/7L22A_1.pdf

http://watchguy.co.uk/technical/Seiko/7L22A_2.pdf

http://watchguy.co.uk/technical/Seiko/7L22A_3.pdf

[Endeavor]

I couldn't have wished for a better and more swift answer !

Thank you very much indeed ro63rto !!!

 

Best regards: Roland.

[ro63rto]

De nada [emoji106]

[Endeavor]

Initially I marked this post a solved, but I was a bit too fast .......... :(

 

The patient on the table is a 2004 Seiko SNL007 with a 7L22 movement. It never had a service and, judging the case, has had a hard working live.

After opening, first thing I noticed was play in the oscillating weight / bearing. The play was enough for the weight to initiate small marks on the hammer guard plate. As I understand, the oscillating weight bearing is incorporated in the oscillating weight bridge, part number: 0198 501. Not having the tools to change out bearings/bushings, I guess I need to try to find a new bridge. Searching the internet has so far yielded no suc6.

 

Does anybody know a source of Seiko parts? Or perhaps for a whole new 7L22 movement?

 

Hope to hear........

 

Roland.

Edited February 19, 2016 by Endeavor

[ro63rto]

Try Toshi at KKHSevices

http://www.kkhservices.co.uk/

There might be someone nearer to you though.

[Endeavor]

Thanks again Ro63tro, I'll write them straight away!

 

Denmark is for 99.99% sure not the place to source any items, regardless for what. Chances are for the same 99.99% that the prices will be double of anywhere else. Leaves Germany or Holland and the UK is also perfect with me ;)

[jdm]

Initially I marked this post a solved, but I was a bit too fast .......... :(

 

The patient on the table is a 2004 Seiko SNL007 with a 7L22 movement. It never had a service and, judging the case, has had a hard working live.

After opening, first thing I noticed was play in the oscillating weight / bearing. The play was enough for the weight to initiate small marks on the hammer guard plate. As I understand, the oscillating weight bearing is incorporated in the oscillating weight bridge, part number: 0198 501. Not having the tools to change out bearings/bushings, I guess I need to try to find a new bridge. Searching the internet has so far yielded no suc6.

 

To be honest I don't think you can do much about it. For quarts/economical/old watches are simply unavailable, too expensive and same for "donor movements and watches". Realistically the owner should wear it as long it works and then consign to the memories drawer.

[Endeavor]

Hello JDM;

 

Whole day I've been searching and writing emails over halve the world. Maybe I missed some caves in the rural parts of Afghanistan. Like you said, unavailable........so it seemed.

Just received an email from somebody who still has two new 0198 501 oscillating weight bridges.....the last ones. Needless to say I ordered them!

But indeed, parts seem to be very rare........

Maybe this time I can make the owner happy !? He seems to have a lot of sentimental value attached to this watch.......

Now I'm awaiting conformation from the seller.........fingers crossed ! ;)

[jdm]

Just received an email from somebody who still has two new 0198 501 oscillating weight bridges.....the last ones. Needless to say I ordered them!

 

When a rotor is lose and touches parts around, I think the part to replace is the ball bearing (or weight if embedded in the there), not the bridge. But I may be wrong, let us know.

[ro63rto]

When a rotor is lose and touches parts around, I think the part to replace is the ball bearing (or weight if embedded in the there), not the bridge. But I may be wrong, let us know.

He hasnt got the tools to replace bearings.

[Endeavor]

As I understand, the new bridge should have a new ball bearing embedded. Indeed, the bearing is worn out, but since I don't have tools for a bearing change out, best for me was to go for a complete bridge.

[jdm]

He hasnt got the tools to replace bearings.

 

Then the rotor will scratch the new bridge again. Or course one could machine off some material from the bottom of the rotor, if you can call that a solution.

[ro63rto]

Then the rotor will scratch the new bridge again. Or course one could machine off some material from the bottom of the rotor, if you can call that a solution.

Bearing is not on the rotor.

[jdm]

Bearing is not on the rotor.

 

I see, that's unlike newer Seiko movements. Bearing is never separated.

[Endeavor]

 

The bridge, with the bearing, is on top of the movement. Then the oscillating weight wheel, then the weight, mounted with a screw. The weight was touching the hammer-guard.