seiko 5856 regulation

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Hello!

I have a 5856 that is losing time. I opened it to see if i could adjust it slightly, but i cant figure out which screw to turn, or if it is even possible on this movement. Can someone maybe point me to the right screw or tell me if i am wasting my time?

 

[Nucejoe]

It probably needs a clean and lube. Check this for more info.

On 2/5/2021 at 3:22 AM, mzinski said:

Does anyone have a King Seiko Caliber 5856 service manual? Or one for a similar reference? 

I have a King Seiko I'd like to clean up but I'm hesitant without a technical document. 

Thanks! 

 

[Kalanag]

This is the only screw with which you might be able to fine tune the timing. It‘s a trim capacitor:

Edited June 4, 2022 by Kalanag

[clockboy]

Found this.Different calibre but for sure it’s how to trim.

 

Edited June 4, 2022 by clockboy

[jpg]

Excellent! thanks alot! do you by any chance know if + is clock wise or counter clock wise?

Absolut beginner here i might add, thank you for your patience!

Edited June 4, 2022 by jpg

[Kalanag]

Mark or photograph the current position and then try. These trim capacitors typically can be rotated all way round and have one position for maximum capacitance. Either way you go from there will reduce the capacitance and speed up the watch.

Edited June 4, 2022 by Kalanag

[Neverenoughwatches]

1 hour ago, jpg said:

Hello!

I have a 5856 that is losing time. I opened it to see if i could adjust it slightly, but i cant figure out which screw to turn, or if it is even possible on this movement. Can someone maybe point me to the right screw or tell me if i am wasting my time?

 

This will regulate the timing. Servicing it will also help, the rotors can get quite clogged up with wear debris. The train wheels are very tiny so be careful, also the rotor can be a real shite to place back with being magnetic. They want to stick to everything and jump around. There is a little trick that helps with that though.

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18 minutes ago, Neverenoughwatches said:

There is a little trick that helps with that though.

 

And what little trick might that be?

[Neverenoughwatches]

3 minutes ago, jpg said:

And what little trick might that be?

If i told you I'd  have to silence you lol

Just now, Neverenoughwatches said:

If i told you I'd  have to silence you lol

Seriously if you decide to strip down and service the movement i can talk you through it .

[bklake]

All of this is based on my hobbyist experience.  Seiko quartz of this era came pretty highly regulated.  They were designed in the mechanical watch era, with mechanical watch parts, and were meant to be serviced.  If it is loosing that much time, it needs a service.  I have serviced a few 754x movements that were loosing significant time.  Without adjusting the trimmer, they all came up keeping time within seconds a month after servicing. 

I would not touch that trimmer screw until you have serviced it.