[SONY TFM C650WL] Gearbox repair

[Dancorp]

SONY TFM C650WL with a COPAL GX-2353 (220v 50Hz)

Hi everyone,

I just bought this clock for parts and i found the problem : the first doublegear of the copal gearbox is damaged.
According to the dimensions, that's a T40 / T10 with a 0.25 MOD.
I cannot find any source for this type a gear online. I need help !

Some pictures : https://photos.app.goo.gl/9a84BxTDLS9gyNOF2
(i also pictured the second gear (close to be the same))

Thanks in advance for your help / remarks

Daniel from Marseille (FR)

[RetroFlip]

Not the easiest but perhaps you could mold the good second gear to get something usable. Something like:

I don't know off hand anywhere that carries that size.

[Dancorp]

it looks not so easy for my case... especially for that size and without this kind of vacuum

[Dancorp]

I finnaly found a T40 gear (0.25M) in a lab clock (looks like a odometer / trip meter)
i succeeded to put the original T10 gear on it (by reversing it)

i added a photoshoped pic on the google photo folder.

Clock works but i have to clean the motor because it fails sometime to start up

[RetroFlip]

Thanks for sharing what you ended up doing, hopefully it keeps time for you once cleaned.

[Matthew]

I'm happy to hear you have found the gear you need. I got a quote from a guy who could make the gear, but it would be very expensive (30 Euros for 2 gears).

[Dancorp]

That's very expensive.
Wait and stay tuned is the best way to find this kind of stuff.
we can find them everywhere, but they are well hidden in unsuspected places.

I wanted to lubricate the engine but it is the opposite that must be made. (the motor have a very low torque)
Today i'll received an isotropic alcohol bottle today to fix it.

[brainitup]

Dancorp Hi,
I recently purchased Sony TFM-C650W with the same motor - COPAL GX-2353. The clock isn't working.
All the gears are intact and function, and the whole mechanism works if I manually start the shaft.
It seems very similar to the problem you had.
But I don't understand how to disassemble the electric motor to clean it.
Should I just forcefully remove everything from the shaft, or is there another way?
Thank you!

[Johan de Jong]

In the below video you see how you can take the motor apart, but hopefully you don't need to and just lubricating it with a little oil is enough (see around 3:30 in the video).

If that does not get the motor to run reliably, you may need to replace the bearings: https://www.flipclockfans.com/forum/...-a-copal-motor This post also shows another take on how to take the motor apart.

[brainitup]

Johan de Jong Thank you!
Lubricating with some oil actually helped, I didn't have to disassemble it