6139 start/stop button is hardly returning - Seiko & Citizen Watch Forum – Japanese Watch Reviews, Discussion & Trading
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Old 03-02-2019, 07:43 AM   #1 (permalink)
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Default 6139 start/stop button is hardly returning

Hi,
My guess is that this is a common issue, nevertheless, your assistance would be much appreciated.
During my amateur "service" to the movement, the start/stop and flyback buttons functioned properly (by pushing with a pegwood stick).
I then cleaned the pushers and gently applied KT-22 on the gaskets.
After casing the movement - I get the following problem with stopping
Flyback pusher - works well
Start/stop pusher -
* Start - works smoothly
* Stop -
On a normal strength push - doesn't stop. But jumps back.
By depressing harder - It is stopping, but the pusher is not jumping back, unless I play with it to release it somehow.

Any Ideas / suggestions please ?
Thank you !
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Old 03-02-2019, 08:33 AM   #2 (permalink)
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Try switching the pushers, see if the problem persists or moves with the particular pusher.

Rob

PS. Change the gaskets if you haven't done so already.

Last edited by scubarob99; 03-02-2019 at 09:14 AM.
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Old 03-02-2019, 09:08 AM   #3 (permalink)
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Suggest you remove the pushers and springs again,


Check the gaskets on the pushers, they may be the originals and become hard. Cut them off with a razor and install new soft gaskets.


Check the springs for equal length and compression. These can become weakened over decades.


Stop pushing so hard on the pushers until you check out the problem.
I've seen many pushers with bent stems due to force.


Good luck. Replacement parts are not difficult to find.
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Old 03-02-2019, 09:17 AM   #4 (permalink)
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Bob, Rob, thank you
I will try switching pushers and check the gasket and spring. Still, if it is a "mechanical issue" with the pushers, I don't get why the Start function would work properly and the Stop wouldn't :/
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Old 03-02-2019, 10:27 AM   #5 (permalink)
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Quote:
Originally Posted by Bob Z. View Post
Suggest you remove the pushers and springs again,


Check the gaskets on the pushers, they may be the originals and become hard. Cut them off with a razor and install new soft gaskets.


Check the springs for equal length and compression. These can become weakened over decades.


Stop pushing so hard on the pushers until you check out the problem.
I've seen many pushers with bent stems due to force.


Good luck. Replacement parts are not difficult to find.
I am servicing a 7017-6010 Speedtimer and just finished the case work and reinstall of the pushers. The advice above is sound. My return pusher when i received the watch was sticking and slow to return. The old seals were like hard plastic. Cut them off and installed new seals and good to go. Check to see that the pushers are bent. You might also try cleaning the pusher tubes with peg wood or a round toothpick dipped in lighter fluid. Apply a small amount of silicone grease to the seals on the pushers or something equivalent.

One last note is to check the condition of the pusher button itself. If there is any old crud or sweat built up on the lower portion of the push button, you need to clean or polish this off so the it slides nicely inside the pusher slot drilled into the case. The pusher buttons should have a clean and mirror finish.

Last edited by Vette Enthusiast; 03-02-2019 at 10:40 AM.
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Old 03-03-2019, 04:15 PM   #6 (permalink)
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Quote:
Originally Posted by scubarob99 View Post
Try switching the pushers, see if the problem persists or moves with the particular pusher.

Rob

PS. Change the gaskets if you haven't done so already.
The problem persists and doesn't move with the particular pusher.
I did not change gaskets since I haven't found a supplier in Europe and I rather eliminate all other options before spending that money.
Further suggestions would be appreciated thanks
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Old 03-03-2019, 04:17 PM   #7 (permalink)
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Quote:
Originally Posted by Bob Z. View Post
Suggest you remove the pushers and springs again,


Check the gaskets on the pushers, they may be the originals and become hard. Cut them off with a razor and install new soft gaskets.


Check the springs for equal length and compression. These can become weakened over decades.


Stop pushing so hard on the pushers until you check out the problem.
I've seen many pushers with bent stems due to force.


Good luck. Replacement parts are not difficult to find.
I switched springs along with the pushers, problem persists.
As I mentioned in the previous post, I would like to eliminate other issues before buying gaskets. thanks
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Old 03-03-2019, 04:18 PM   #8 (permalink)
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Quote:
Originally Posted by avion View Post
The problem persists and doesn't move with the particular pusher.
I did not change gaskets since I haven't found a supplier in Europe and I rather eliminate all other options before spending that money.
Further suggestions would be appreciated thanks

For troubleshooting purposes, just cut out the old o-rings. They need to go anyway. If that solves the return issue you will have identified the problem.


If not, clean out the button hole inside the pusher cap and the outer area in the pusher slot in the case. Gunk builds up and sometimes that can be an issue too.
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Old 03-03-2019, 04:22 PM   #9 (permalink)
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Quote:
Originally Posted by Grammarofdesign View Post
For troubleshooting purposes, just cut out the old o-rings. They need to go anyway. If that solves the return issue you will have identified the problem.


If not, clean out the button hole inside the pusher cap and the outer area in the pusher slot in the case. Gunk builds up and sometimes that can be an issue too.
That's an interesting troubleshooting approach )
I will try cleaning again. Even though this case seems to be pristine.
Thank you !
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Old 03-03-2019, 04:24 PM   #10 (permalink)
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Quote:
Originally Posted by Vette Enthusiast View Post
I am servicing a 7017-6010 Speedtimer and just finished the case work and reinstall of the pushers.... .
Thank you, I will follow your advice as well
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Old 03-03-2019, 04:48 PM   #11 (permalink)
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Quote:
Originally Posted by Vette Enthusiast View Post
I am servicing a 7017-6010 Speedtimer and just finished the case work and reinstall of the pushers.... .
Thank you, I will follow your advice as well
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Old 03-03-2019, 04:55 PM   #12 (permalink)
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Are the coupling levers Operating in the proper position when engaged with the Center Chrono wheel as they should ?
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Old 03-03-2019, 06:09 PM   #13 (permalink)
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Occasionally I've reamed out the pusher hole a little.

Many times I've had to stretch the spring to give it more life.
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