scoobs1971 Posted May 8, 2008 Report Share Posted May 8, 2008 After replacing a faulty double corrector on a 7750-GMT movement, the quicksetting for date and GMT sometimes work and sometimes the double corrector doesn't seem to engage with either the DW or the GMT gear. It's like the spring isn't properly connected to the double corrector to put it back in place. I also suspect the double corrector to work a bit different than on a standard 7750, so I have no reference on how to install it properly. Does anyone have a picture showing how to install the double corrector and connect it with the spring attached on the date plate? In what order do I install the date plate, DW, GMT gear and double corrector? 1 Quote Link to comment Share on other sites More sharing options...
capice Posted May 17, 2008 Report Share Posted May 17, 2008 Wow Pat, wish I could be of help here m8, otherwise you have to wait for Koln, maybe Taka can adjust this....before the drinks ofcoarse Quote Link to comment Share on other sites More sharing options...
scoobs1971 Posted May 18, 2008 Author Report Share Posted May 18, 2008 Wow Pat, wish I could be of help here m8, otherwise you have to wait for Koln, maybe Taka can adjust this....before the drinks ofcoarse It's the eaxct same part as Taka and I worked on for hours the last time, so I hoped somebody could instruct us better... Quote Link to comment Share on other sites More sharing options...
takashi Posted May 18, 2008 Report Share Posted May 18, 2008 I am very very interested to know too... On this piece it looks like to be pretty different. This part simply couldn't fit. We tried both ways to open the top plate, install it (didn't work) and open just the retainer plate for this double corrector and datewheel, also didn't work. Quote Link to comment Share on other sites More sharing options...
scoobs1971 Posted May 18, 2008 Author Report Share Posted May 18, 2008 I am very very interested to know too... On this piece it looks like to be pretty different. This part simply couldn't fit. We tried both ways to open the top plate, install it (didn't work) and open just the retainer plate for this double corrector and datewheel, also didn't work. I now got the double corrector from another broken 7750 GMT, but still can't get it to work But then again, this part could be the broken part, lol. Quote Link to comment Share on other sites More sharing options...
ajoesmith Posted June 16, 2008 Report Share Posted June 16, 2008 Post some pics of the problem and we can all try and fix it for you guys! THe more brains working on it the better! EDIT: by the way whats a 'double corrector'? I might know it to see just dont know the correct terminology Quote Link to comment Share on other sites More sharing options...
scoobs1971 Posted June 16, 2008 Author Report Share Posted June 16, 2008 EDIT: by the way whats a 'double corrector'? I might know it to see just dont know the correct terminology The double corrector is the 'star' wheel that engages with either the date wheel or with the wheel sporting the GMT hand when setting the crown in the 2nd position. I'll try to make a pic somewhere this week. Quote Link to comment Share on other sites More sharing options...
ajoesmith Posted June 16, 2008 Report Share Posted June 16, 2008 The double corrector is the 'star' wheel that engages with either the date wheel or with the wheel sporting the GMT hand when setting the crown in the 2nd position. I'll try to make a pic somewhere this week. Is it the gear next to the date '18' in this pic? Quote Link to comment Share on other sites More sharing options...
scoobs1971 Posted June 16, 2008 Author Report Share Posted June 16, 2008 Is it the gear next to the date '18' in this pic? Yes it is. On a regular 7750 it changes between day and date setting. On a GMT the day wheel gears have been replaced by the GMT gears. Takashi already found out that it's exactly the same part as on a regular 7750, so I must be doing something wrong when installing this star wheel vs the little spring which enables switching between GMT and day setting. Quote Link to comment Share on other sites More sharing options...
scoobs1971 Posted July 5, 2008 Author Report Share Posted July 5, 2008 Post some pics of the problem and we can all try and fix it for you guys! It took some time, but finally I've made some pics of dissassembling the GMT module. See first post. Quote Link to comment Share on other sites More sharing options...
Drulee Posted February 1, 2010 Report Share Posted February 1, 2010 Scoobs or Takashi, did you ever find the solution to this problem? EDIT: And thanks for posting those pics. I just wish I'd found this thread yesterday - it would have saved me a few frustrating hours of tinkering. Quote Link to comment Share on other sites More sharing options...
Drulee Posted February 2, 2010 Report Share Posted February 2, 2010 I guess it is too old a thread for those who participated to remember the fix ?? Quote Link to comment Share on other sites More sharing options...
Drulee Posted February 3, 2010 Report Share Posted February 3, 2010 After further examination of the double connector and the date platform, I believe the connector may be positioned on the wrong side of the wire/rod attached to the bottom of the platform. I know that some PAM A7750 movement platforms may be missing the wire, but it is present on this GMT one, so perhaps this is what needs to be looked at ??? Just typing out loud here Quote Link to comment Share on other sites More sharing options...
Drulee Posted February 3, 2010 Report Share Posted February 3, 2010 Just to update, the double corrector has to have the turned down notch, on the right side of the plate, placed above the wire/rod (which is attached to the date platform) in order for it to work properly on my GMT A7750. However, I am now back to the "slipping" problem I started with - where after turning the crown to set the date, the DW will stop advancing and the gold star cog on the double corrector will seem to "slip". I'm fairly certain this is happening because of a worn down tooth, or teeth, on the intermediate setting wheel, or setting wheel, or other cog ???? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.