natval Posted December 4, 2011 Report Share Posted December 4, 2011 Guys, Just carried out the Gen Tube and Crown upgrade to my Stripped Ultimate PO But although the Crown screws down tight and everything work fine, it unscrews it self !! any one had this happen ?? Is it faulty threads ? or maybe the compressed o ring seal forcing it to unscrew itself ? Any ideas ? any advice would be gratefully received Link to comment Share on other sites More sharing options...
the_rymeister Posted December 4, 2011 Report Share Posted December 4, 2011 Hi mate did you bond the new tube onto your case? Just done my upgrade last week, had to stick tube on twice! Was a knightmare. Link to comment Share on other sites More sharing options...
correctime Posted December 5, 2011 Report Share Posted December 5, 2011 That would have been my quess.... the tube unscrewing from the case rather than the crown unscrewing from the tube. Though that doesn't explain it doing that on it's own Link to comment Share on other sites More sharing options...
natval Posted December 5, 2011 Author Report Share Posted December 5, 2011 thanks for the replys, the tube is stuck fast, the crown tightens down on it each time but springs back on its self and unwinds, might try a bit of loctite down the tube on the threads to see if that holds it Link to comment Share on other sites More sharing options...
bamcky2k Posted December 5, 2011 Report Share Posted December 5, 2011 might try a bit of loctite down the tube on the threads to see if that holds it your gonna superglue your crown onto its tube?? if that sticks the threads fast how would you un-screw the crown to set time/date etc?? is your stem the right length? if its abit long or jamming on somthing in the movement/not lineing up straight, perhaps its twisting the stem inside the crown-then untwisting itself causing the stem to unscrew at the same time?? never heard of a crown unscrewing itself though! may want to call in an exorcist if all else fails.... Link to comment Share on other sites More sharing options...
natval Posted December 5, 2011 Author Report Share Posted December 5, 2011 not superglue, i meant the loctite paste, the one that doesnt dry, threadlocking i think they call it the stem is a bit shorter than the rep stem, but everthing is working OK ! Link to comment Share on other sites More sharing options...
bamcky2k Posted December 5, 2011 Report Share Posted December 5, 2011 Ahhh right! Thought you ment loctite superglue then! Threadlock may work, I use it on my bike pedals...maybe a bit overkill for the watch though. Can you actually see the crown unscrew? Like does it happen fast or over a certain length of time? Link to comment Share on other sites More sharing options...
the_rymeister Posted December 5, 2011 Report Share Posted December 5, 2011 Hi mate is there anyway you can film what your crown is doing on your phone and post it on here? I'm no watch expert but that sounds strange to me.does it unscrew straight away or over the period of the day? Link to comment Share on other sites More sharing options...
correctime Posted December 6, 2011 Report Share Posted December 6, 2011 I can sort of believe the stem may be a tad too long...and is somehow working it's way back out against maybe the tension of the mainspring or somehow the rotor rotation is helping to cause this (too long would have it in the winding position all the time)....but it's been my experince with a stem being that much too long it would jam up the mvt. and quit working within a few minutes tops. This is interesting and I'm looking forward to hearing the definate cause of this issue............................................ Link to comment Share on other sites More sharing options...
correctime Posted December 6, 2011 Report Share Posted December 6, 2011 Hi mate is there anyway you can film what your crown is doing on your phone and post it on here? I'm no watch expert but that sounds strange to me.does it unscrew straight away or over the period of the day? +1....I'd like to see that myself. Link to comment Share on other sites More sharing options...
natval Posted December 6, 2011 Author Report Share Posted December 6, 2011 thanks for the input Guys, it starts to spring back on itself, about a 1/4 to 1/2 turn strainght away, and then slowly seems to unwind the rest of the way, athough it tightens down it will not stay tight gonna strip it down and have a closer look,i will get another crown and tube from cousins just incase Link to comment Share on other sites More sharing options...
bamcky2k Posted December 6, 2011 Report Share Posted December 6, 2011 if stem is a tad short perhaps its screwing right down too much onto the little rubber o-ring inside the crown, the o-ring being compressed too much and slightly wound could start to return to its normal shape and position taking the crown with it...quick at first then abit slower...i dont think that would unwind it the whole way though, just a half or full turn at most. try removing the movement from the case, then screw the crown into position...if it still happens its the crown and tube-if it doesnt and stays tight its probs something with the movement... Link to comment Share on other sites More sharing options...
natval Posted December 8, 2011 Author Report Share Posted December 8, 2011 gonna try that this weekend i feel its the rubber o ring undercompression thats causing it Link to comment Share on other sites More sharing options...
blue_sphere Posted December 8, 2011 Report Share Posted December 8, 2011 You need to take it apart and check the tube. It is definitely the tube. You probably didn't use thread-lock which is a must with these pieces. Getting the crown out from the tube may be difficult... do not try to force it or you may damage something. If you can not fix it, SEND IT TO A MODDER HERE and bite the bullet. Best of luck! Link to comment Share on other sites More sharing options...
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