Steve227 0 Posted September 10, 2010 Hey all, had incoming today, 3 beauties! Pics to follow this weekend - PAM212, PAM288 and Tag Carrerra Racing. All look great and really happy however one has a really noisy rotor, and I mean NOISY! As an example, if I'm driving and I make a big turn you can hear it in the back! I know some of the asian movements have a rep for this. Has anyone tried lubricating and if so did it make a big difference? Just wondered before I think about whipping off the back. Cheers all Share this post Link to post Share on other sites
sconehead 5 Posted September 10, 2010 What movement is it? It could be the rotor isn't screwed down tight and is rubbing against something. Yes, they can be lubricated and it can make a difference... Share this post Link to post Share on other sites
Steve227 0 Posted September 10, 2010 Hey Sconey, its a A7750 21600bph, will take a pic later as kids still up! Hopefully just something straight forward. My others are a little noisy but this one!!! Its like my 7month olds rattle!!!! Share this post Link to post Share on other sites
sconehead 5 Posted September 10, 2010 Ok, Asian 21j non-chrono movements are noted for noisy rotors normally...I'll see what I can dig up regarding a lubrication tuto... Share this post Link to post Share on other sites
sconehead 5 Posted September 10, 2010 Taken from Ziggy, ''The 7750 rotor only winds in one direction. The winding direction has resistance since the rotor is trying to wind the mainspring. In the other direction there is no resistance at all, and the rotor is free to spin around, and around…and around… If the rotor bearings are dry, there is nothing preventing the rotor from spinning like crazy. Lubricating the bearings helps to quiet the rotor and prevent such a free spin in the non-winding direction. The noisy rotor is normal, it can be made quieter during servicing when it’s lubricated, or you can lubricate it without a full service.'' Edit: ETA officially recommends using Moibeus 9010 oil on the rotor bearing... look here under assembling, http://www.eta.ch/swisslab/7750/7750.html Share this post Link to post Share on other sites
Steve227 0 Posted September 10, 2010 Sconey, you are a gent and a scholar. Thanks mate. Share this post Link to post Share on other sites
Ska 11 Posted September 10, 2010 he most certainly is! Sconey = Legend Share this post Link to post Share on other sites
pollux1 3 Posted September 10, 2010 he most certainly is! Sconey = Legend +1000000000 Share this post Link to post Share on other sites
P_Diddy 0 Posted September 10, 2010 have you got a tutorial for lubricating or damping down the rotar noise on A21j down to ETA noise levels? Ok, Asian 21j non-chrono movements are noted for noisy rotors normally...I'll see what I can dig up regarding a lubrication tuto... Share this post Link to post Share on other sites
warcelo 0 Posted November 16, 2010 Hey guys! Is it easy to DIY oil your 7750? Do i have to only open the case back and put oil in the rotor or is there anything else? Mine is too noise! Thanks! Share this post Link to post Share on other sites
KBH 7 Posted November 16, 2010 Hey Sconey, its a A7750 21600bph, will take a pic later as kids still up! Hopefully just something straight forward. My others are a little noisy but this one!!! Its like my 7month olds rattle!!!! Is the rotor spinning and unwinding the watch? That's a whole different problem caused by either dirty or defective reversing wheels. I couldn't find it here in Francisco's Tutorials but I did find it on another forum. It's a very common problem. http://www.rwgforum.com/topic/93138-repair...tor-spins-7750/ Share this post Link to post Share on other sites
warcelo 0 Posted November 16, 2010 And how about a tutorial for only oil the rotor? Mine does not spin when manually winding, but does a noise when it's automatically winded! Share this post Link to post Share on other sites
deadmeat 0 Posted August 25, 2012 Taken from Ziggy, ''The 7750 rotor only winds in one direction. The winding direction has resistance since the rotor is trying to wind the mainspring. In the other direction there is no resistance at all, and the rotor is free to spin around, and around…and around… If the rotor bearings are dry, there is nothing preventing the rotor from spinning like crazy. Lubricating the bearings helps to quiet the rotor and prevent such a free spin in the non-winding direction. The noisy rotor is normal, it can be made quieter during servicing when it’s lubricated, or you can lubricate it without a full service.'' Edit: ETA officially recommends using Moibeus 9010 oil on the rotor bearing... look here under assembling, http://www.eta.ch/swisslab/7750/7750.html Man, this is a CRAZY good tutorial / presentation. Thank you Share this post Link to post Share on other sites
