maxmilian Posted February 12, 2007 Report Share Posted February 12, 2007 I have strange problem or maybe not.... One of my 7750 is loosing a lot of time and fast when the crown is screwed in all the way. If I keep the crown in the winding position it keeps perfect time but if I screw the crown in it loose like 10 min/ hour. What could be wrong ? is the stem to long ? also sould there always be an o-ring at the crown on a 7750 ? Quote Link to comment Share on other sites More sharing options...
RWG Technical Posted February 12, 2007 Report Share Posted February 12, 2007 Sounds like something is definetly wrong with it. Probably not a movement problem, but I would guess that when you screw the crown down, the pressure is causing the dial or movement to shift sideways and this is pressing on the hands, which is causing the watch to slow down... I think the movement is not secure in the case, I would check this before I cut the stem down... RG Quote Link to comment Share on other sites More sharing options...
Pugwash Posted February 12, 2007 Report Share Posted February 12, 2007 also sould there always be an o-ring at the crown on a 7750 ? A 7750 is a movement. Movements don't need O-Rings, watches do. What watch is it? Quote Link to comment Share on other sites More sharing options...
maxmilian Posted February 12, 2007 Author Report Share Posted February 12, 2007 (edited) Sounds like something is definetly wrong with it. Probably not a movement problem, but I would guess that when you screw the crown down, the pressure is causing the dial or movement to shift sideways and this is pressing on the hands, which is causing the watch to slow down... I think the movement is not secure in the case, I would check this before I cut the stem down... RG Thanks The Zigmeister The movement is secured but could it be misaligned in some way ? Maybe I should loose the movement insert the stem and then secure the movement again ?? Edited February 12, 2007 by maxmilian Quote Link to comment Share on other sites More sharing options...
maxmilian Posted February 12, 2007 Author Report Share Posted February 12, 2007 A 7750 is a movement. Movements don't need O-Rings, watches do. What watch is it? True that didnt come out right, well this watch dont have a o-ring on the stem and I was figure maybe that makes the stem go in to long ?? Btw got the DJ today...wife is happy thanks !! Will take some pics and do a writeup soon Quote Link to comment Share on other sites More sharing options...
Pugwash Posted February 12, 2007 Report Share Posted February 12, 2007 Btw got the DJ today...wife is happy thanks !! Will take some pics and do a writeup soon See? It's an excellent watch, but it just wasn't my style. Quote Link to comment Share on other sites More sharing options...
maxmilian Posted February 12, 2007 Author Report Share Posted February 12, 2007 See? It's an excellent watch, but it just wasn't my style. Yeah I think it looks better on a girl. I hope The Zigmeister look at the above post and not this little thread crapping Quote Link to comment Share on other sites More sharing options...
Pugwash Posted February 12, 2007 Report Share Posted February 12, 2007 What I would recommend is decasing the movement, cleaning the inside of the case and putting it all back together carefully. If it's a movement alignment problem, this should fix it. Quote Link to comment Share on other sites More sharing options...
RWG Technical Posted February 13, 2007 Report Share Posted February 13, 2007 I would check the hole in the dial for the hands, and see if it's touching the hands, that is the most obvious problem, but it's very difficult to know without having the watch in person to examine. If it's stopping when the crown is screwed in place, then someting is moving and jamming up the movement, you have to examine it with a loupe and find where it's moving and what is touching. RG Quote Link to comment Share on other sites More sharing options...
maxmilian Posted February 13, 2007 Author Report Share Posted February 13, 2007 I would check the hole in the dial for the hands, and see if it's touching the hands, that is the most obvious problem, but it's very difficult to know without having the watch in person to examine. If it's stopping when the crown is screwed in place, then someting is moving and jamming up the movement, you have to examine it with a loupe and find where it's moving and what is touching. RG Thanks The Zigmeister I will try to really examine the movement. Quote Link to comment Share on other sites More sharing options...
maxmilian Posted February 14, 2007 Author Report Share Posted February 14, 2007 Ok now I have decased the movement realigned it before putting it back together. I have to add I usuallly have time to play with my watches like between 2200 and 2400 when the kids is in bed so I havent really noticed one thing before. The watch loose like 10 min between 2200 and 2400 and between 1000 and 1200. any other time of day/night it keeps perfect time !! So anyone Have any idea what could be wrong then ? Quote Link to comment Share on other sites More sharing options...
RWG Technical Posted February 14, 2007 Report Share Posted February 14, 2007 It sounds like you have a slipping cannon pinion gear. One way of knowing if the gear is bad, is to turn the crown in the time setting position, if it feels loose and there is not a lot of friction or resistance, this could be the problem... RG Quote Link to comment Share on other sites More sharing options...
maxmilian Posted February 14, 2007 Author Report Share Posted February 14, 2007 (edited) It sounds like you have a slipping cannon pinion gear. One way of knowing if the gear is bad, is to turn the crown in the time setting position, if it feels loose and there is not a lot of friction or resistance, this could be the problem... RG Thanks The Zigmeister after some googling thats what I was thinking, will a regular ETA cannon pinion gear fit on the asian 7750 ? And also where could it be bought ? Edited February 14, 2007 by maxmilian Quote Link to comment Share on other sites More sharing options...
RWG Technical Posted February 14, 2007 Report Share Posted February 14, 2007 Thanks ziggy after some googling thats what I was thinking, will a regular ETA cannon pinion gear fit on the asian 7750 ? And also where could it be bought ? ETA offset cannon (part # 240) will fit the new 28.8K Asian only, it will not fit the older models... RG Quote Link to comment Share on other sites More sharing options...
maxmilian Posted February 16, 2007 Author Report Share Posted February 16, 2007 ETA offset cannon (part # 240) will fit the new 28.8K Asian only, it will not fit the older models... RG So All I need now is to get one of those babys Quote Link to comment Share on other sites More sharing options...
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