New Daytona - Asian 7750 - running Seconds at 6

[RWG Technical]

The 7750 gods are messing with me again.

Of all the new Asian 7750's I have serviced, the ones in the Daytona's seem to be problematic.

I have 2 in house that are DOA (Dead on Arrival).

One looks like it was dropped or banged up in shipping (to the customer, not to me) it had a broken tooth on the 3rd wheel, and even with a new wheel, wont' run as the balance pivots appear to be bent. So this one is a problem due to handling or shipping..at least that is what I can tell from my inspection...

The second Daytona I have in house, is bad also... I just spent 6 hours it, and I did not have a good time as there were lots of problems...

1. Pallet stones falling out (see other post on this issue). I reinstalled the stone and glued them both in place (this is common on ALL new Asian 7750's)

2. Pallet arm too much end play, not disengaging from escape wheel consistantly, not enough run to the banking pins etc, etc... What a mess, I spent hours sorting and adjusting the banking pins so that the escape wheel would release each tooth, and also getting it adjusted correctly, only to get it working great, until I turned the movement over...seems as if there is so much end play that the balance wheel impulse jewel falls out of the pallet fork and the movement stops working....so unless you want to wear the watch with the dial face towards your wrist, this one is a dead movement also...

The movement stopping when turned over is a combination of the pallet arm problem, and a much too short balance wheel impulse jewel, combined they allow the Impulse jewel to come out of place on the pallet fork . I tried for a couple of hours to try and move the pallet jewel a few thousands of a mm up to take up the slack, but that did not fix anything...I can't do anything about the impulse jewel, it is what it is...

So after 6 hours, I have a non-working and not repairable movement, no parts are available, so only possible solution is for the owner to ask the seller for a new movement, and I will take the parts I need to fix this one up...(the rest of the movement is great, clean, olied etc... if I can get the pallet arm and balance to work it will be fine).

I never liked these daytona's with seconds at 6, and this is my last time fixing any of them, too stressful and frustrating. I of all people want to send a working dependable watch back to the owner, no matter what...when I have problems like this I take it personally (even if I know it's not my fault...I dont' make them, only service them...).

Not sure why these are problematic, yet the other Asian 7750's in the other watches are fine, but I will know more by next week as I have 3 more new Asian IWC models to overhaul, based on my past experiences with these, they should be fine...here's hoping that this problem is not with all Asian 7750's...

Ironically I NEVER had this type of problem with the OLD Asian 7750, I got each and every one of those working (of the dozens and dozens I serviced).

Thanks for listening to the rant, now I will go poke my eye out with the tweezers (less painful than having to work on these again....ahhhhh....)

Cheers,

RG

[rek001]

Sorry to hear of your frustration, Zig. It sounds terrible, and thanks for letting us know about this.

Well, so much for my desire for a Daytona.

[vmena]

Sorry for this (probably) stupid and surely 1000 times answered question, but... does the real swiss ETA 7750 in daytonas has so many problems? I'm begeninig feeling some attraction for Daytonas and would like to know if there is any rep with a trustable mov. Thans in advance.

[JJFlash]

The moral of this story:

When the new, improved Asian 7750 movement has problems,

it is best to replace the entire movement rather that attempting

what will most likely turn out to be a time consuming and more costly repair.

.....I learned this from DaytonaT.

[Watchmeister]

That's my approach too.