Ladies Omega Seamaster 684 running Slow

[OmarHaltam]

Hello

I have a ladies Omega Seamaster from the 80' Cal. 684 that i cleaned, oiled and installed a new mainspring in it.

it is running 12-15 min slow per day. I will put a picture of the amplitude screen shot.

i am new to watch repairing so any help and suggestions welcome.

Thanks,

Omar

[OmarHaltam]

i also did dip the mainspring in One Dip Solution

[Marc]

According to your timegrapher it is running at 65 sec per day fast, not slow. Also the 2ms beat error is a little higher than I would be comfortable leaving it and as you have an adjustable h/s stud this should be easy to correct, and the amplitude is a little low. The rate error should be easily within the adjustment range on the regulator.

If the hands are losing 15 minutes per day then it suggests that you may have a loose canon pinion.

[OmarHaltam]

thanks for the input , i will check that today[emoji1303]

[OmarHaltam]

i checked the cannon pinion and it seems to have a little rust on it!
would that cause the problem?
and how do i clean that?

thanks

[OmarHaltam]

[OmarHaltam]

[OmarHaltam]

could i buff it with my pink wheel?

[OmarHaltam]

or maybe soak it in Coca Cola... LOL

[Paul78]

i've found using a fibreglass scratch brush is quite good for removing small bits of rust off things like setting levers etc, haven't tried it on a canon pinion but it cant hurt to give it a go. 

[rodabod]

I'd recommend washing your hands before working on watches.

 

I would aim for higher than 220 degrees amplitude at full wind on a movement like this. The +65s should be easily adjusted along with the beat error (as already suggested).

[rogart63]

The amp should go up when you adjust the beat error? But it must be something else? The center wheel and the cannon pinion is my guess? Probably slipping.

[OmarHaltam]

20 hours ago, rodabod said:

I'd recommend washing your hands before working on watches.

 

I would aim for higher than 220 degrees amplitude at full wind on a movement like this. The +65s should be easily adjusted along with the beat error (as already suggested).

LoL ... yeah i will do that.

i am a jeweler as well so my hands get dirty with rouge. but i work on the watches usually at home at my dedicated bench for watch repair.

a little cleaner environment 

[Hamish]

Hi, I would not use any power tools on the canon pinion. There are probably many ways to carefully remove the rust, but this tool would be too extreme I think. The temptation to use the fibreglass cleaner with the pinion in place may cause particles to be left contaminating the mechanism requiring a reclean so you would need to remove it first if you wanted to avoid this. I would take the pinion out and examine where it fits over the fourth wheel. It is there where it would be likely loose as Marc suggests. Any binding between the pinion and the hour wheel would possibly cause a stoppage rather than run slowly. Take a great deal of care in tightening the pinion if this is the cause.

[JohnR725]

On 11/15/2016 at 7:40 PM, OmarHaltam said:

i also did dip the mainspring in One Dip Solution

did you rinse your new mainspring or are you telling us you rinsed the hairspring? modern mainsprings are prelubricated and if you rinsed it off not sure what it would do to the lubrication on the spring so you'll probably have to lubricated it.

then here's an example of someone working on the same watch you have you'll notice the amplitude is a little better than yours so yours is a little on the low side. Then one minor note when measuring amplitude on this specific watch it is 48°. Then unfortunately Omega does not specify maximum amplitude but the minimum amplitude at 24 hours use 160°. so if you run it for 24 hours in a falls below this you have a problem.

http://watchguy.co.uk/service-omega-geneve-calibre-684/