Noisy rotor

[Gaus]

Hello dear watchfriends, I bought myself a Citizen Prodiver automatic (NY0040-17LE). It looks very nice I think. The movement has a Calibre 8203 on board. I think the rotor (oscillator) is very noisy. I have inspected the movement but the rotor is tightened enough. What can I do? Thank you in advance. 

Edited September 11, 2020 by Gaus

[smcchr00]

Do you know where the noise is originating? Some automatics I have worked on note in the service sheet to lubricate the ball bearings. Perhaps that could help? 

[Gaus]

should a tiny bit of D5 help?

[Nucejoe]

Bearing should be lubricated even if it isn't noisy

Perhaps its service time. 

I presume you have no timegrapher to tell how healthy it runs.

 

 

[Gaus]

Hello Nucejoe, I have a timegrapher. But the watch is new.

[CaptCalvin]

This movement generates 2 kinds of noises. The first one would be the rotor bearing when it's free spinning in the non-winding direction. DO NOT use D5 on the ball bearing. It will kill your self-wind efficiency. Use a tiny bit of 9010. The other noise would be the ratcheting noise when self-wind is doing its thing. The click in this movement is engaging with the reverser wheel and not the ratchet wheel and also generates quite a bit of noise. To dampen this noise you'd have to grease the ratchet teeth on the bottom half of the reverser wheel. Access is restricted by the balance cock so you would need to remove that first.

[Gaus]

Thank you all for your advice. It is very clear to me. 

[JohnC]

Hate to say it but I think these Miyota 8000 series also just have a reputation for loud rotor noise. May not be indicative of a problem, since as you say the watch is new. 

[Lacazema]

1 hour ago, JohnC said:

Hate to say it but I think these Miyota 8000 series also just have a reputation for loud rotor noise. May not be indicative of a problem, since as you say the watch is new. 

Yes, I have a Timex Marlin (TW2T23200) with a Miyota 8215 and you can hear the rotor when you move your arm around. It's a noisy movement.

On the topic of noisy rotors, I've heard the STP3-13 on the Zodiac Olympos is noisy as well.

[Nucejoe]

So it runs in the family. 

In Japan, police gives you a ticket if your watch or bike ain't noisy, everything  berry berry noisy there. 

[anilv]

Probably just wear but excessive wear can hit the watch movement so you need to check this out.

1. Are there any marks where the rotor has hit the edge of the case?

2. Press on the rotor in the middle part next to the bearing. Does the rotor weight lift up when you do this? 

If you answer 'yes' to any of the above then you need a new rotor.

 

If the answer is 'no' to the above 2 questions you can get by with a clean and oil.

You need to remove the rotor.. clean it in some solvent (lighter fluid) is fine and oil with some very light oil.

Just adding oil without cleaning may reduce noise but you're just creating a gritty paste which will increase wear.

To remove the rotor most Citizens require a spanner tool, I made one by filing a groove in a stainless steel pen clip.

 

Good luck!

Anilv