automatico Posted March 1, 2012 Report Share Posted March 1, 2012 There is a good thread on TZ Watchmaking and Repair titled 'Low Amplitude on Rolex 1520' that shows some common trouble spots with this particular movement. The part about the center sweep second pinion bushing etc also applies to cal 1570/75 etc. The advice on spotting and correcting minor hairspring trouble is also very good and the pictures make it easy to follow. Anyone who owns a 1520 or 1570/75 could benefit from reading this thread and looking carefully at the pictures in order to remember what to look for. Something else to look for is an out of round hole on the dial side where the mainspring barrel arbor runs in the mainplate. When this hole wears out of round, the MS barrel can bind or drag on the plate and cause power reserve problems etc. I have converted a few 17 jewel 1520 autowind assemblies to fully jeweled and it is not hard at all but you really need a jewel setting tool set to get it done precisely. All you have to do is remove the jewels and measure the OD of the bushings and the OD of the arbor that runs in them (plus the thickness) and order the jewels from a supply house and be sure to order jewels with oil sinks. Keep in mind the replacement jewels for converting 17 jewel auto assemblies are not the same as the jewels used in 26 jewel models...the OD is bigger for the conversion jewels. I made up a few Frankensteins with rolex 1520/1575/1575GMT in the past and had pretty good luck with the donor movements that I bought here and there but I have just about stopped using rolex movements because of the parts situation...hard to find and high prices. Future projects will probably have eta/AS/Bulova etc movements. http://forums.timezone.com/index.php?t=tree&th=1756140&mid=6051783&rid=0&rev=&reveal= Link to comment Share on other sites More sharing options...
freddy333 Posted March 1, 2012 Report Share Posted March 1, 2012 Auto - Would you care to do a tutorial guide (with pics) on how to change that center sweep second pinion bushing? Link to comment Share on other sites More sharing options...
RWG Technical Posted March 1, 2012 Report Share Posted March 1, 2012 Interesting...but somewhat disturbing... If you have a hairspring that looks like this, and you have to ask Anything look out-of-sorts in this: Then maybe, just maybe, you need to take a few more watchmaking lessons... Kalf must be loosing his arrogance, normally he would be all over someone who was this incompetent. Link to comment Share on other sites More sharing options...
FxrAndy Posted March 1, 2012 Report Share Posted March 1, 2012 Well that is not going to run well is it! Link to comment Share on other sites More sharing options...
HauteHippie Posted March 1, 2012 Report Share Posted March 1, 2012 Is this guy actually being entrusted to service other people's watches (and being paid to do so) ?!?! Link to comment Share on other sites More sharing options...
Original Scope Posted March 1, 2012 Report Share Posted March 1, 2012 Thanks for the link Auto. I always enjoy your post. Very helpful. Link to comment Share on other sites More sharing options...
freddy333 Posted March 1, 2012 Report Share Posted March 1, 2012 Is this guy actually being entrusted to service other people's watches Looks like he did Link to comment Share on other sites More sharing options...
freddy333 Posted March 1, 2012 Report Share Posted March 1, 2012 Speaking of balances & hairsprings, anyone have or know of a source for a NOS balance/hairspring combo for a 1030? Link to comment Share on other sites More sharing options...
Justasgood Posted March 1, 2012 Report Share Posted March 1, 2012 Speaking of balances & hairsprings, anyone have or know of a source for a NOS balance/hairspring combo for a 1030? Maybe.......let me check. Link to comment Share on other sites More sharing options...
freddy333 Posted March 1, 2012 Report Share Posted March 1, 2012 If it helps, part number is 6932. Holding breathe........................... Link to comment Share on other sites More sharing options...
RWG Technical Posted March 1, 2012 Report Share Posted March 1, 2012 Given the rarity of the parts, you may pass out before finding one... Link to comment Share on other sites More sharing options...
automatico Posted March 2, 2012 Author Report Share Posted March 2, 2012 "Auto - Would you care to do a tutorial guide (on how to change that center sweep second pinion bushing?" pics) I never had to replace one but I would guess you might be able to broach it out using a small broach like used on hands and then press a new one in with a small shouldered tool from a staking set. You might have to turn the tool down because the bushing is so small though. The rolex oiling chart shows to keep the ss pinion dry and do not oil it where it runs in the bushing. Sometimes little jobs like this can turn out to be a real headache. Next time I have a 1520/70 apart, I will take a close look and see what's what. Link to comment Share on other sites More sharing options...
Jkay Posted March 2, 2012 Report Share Posted March 2, 2012 I can plainly see the problem with the hairspring, but what is the cause? Is it magnetized? thanks Link to comment Share on other sites More sharing options...
automatico Posted March 2, 2012 Author Report Share Posted March 2, 2012 "I can plainly see the problem with the hairspring, but what is the cause? Is it magnetized?" The section of the hairspring between the attachment point and regulator pins has a kink in it where it should be a smooth arc. The kink is partially covered by the spoke in the balance wheel in the picture in this post. This kink is causing the hairspring to be out of center and after the guy straightened the kink out, the hairspring centered over the balance wheel. The hairspring was Ok when it was mounted on the balance wheel and not attached to anything else...it was just being forced out of center by the kink when mounted. This is a common 'flat' hs and not a 'Breguet' overcoil hs so it is easier to deal with. Look down at the bottom of the thread at the post titled 'Your hairspring appears to be out of center' to see exactly what was wrong. Link to comment Share on other sites More sharing options...
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