philbone Posted February 11, 2014 Report Share Posted February 11, 2014 Anyone have an oscillating pinion for an Asian 7750 movement for sale? Preferably close to Los Angeles. Quote Link to comment Share on other sites More sharing options...
SSTEEL Posted February 11, 2014 Report Share Posted February 11, 2014 Rotor pinion? You referring to the screw that holds the rotor in place? Quote Link to comment Share on other sites More sharing options...
philbone Posted February 11, 2014 Author Report Share Posted February 11, 2014 Thanks SSteel, No - the oscillating pinion is the double geared shaft that clutches back and forth to engage the chronograph second hand. I need that part (Valjoux part number is 8086) Phil Quote Link to comment Share on other sites More sharing options...
Rolexman Posted February 11, 2014 Report Share Posted February 11, 2014 The Swiss version will fit. Quote Link to comment Share on other sites More sharing options...
imajedi Posted February 12, 2014 Report Share Posted February 12, 2014 The Swiss version will fit. +1 Quote Link to comment Share on other sites More sharing options...
philbone Posted February 12, 2014 Author Report Share Posted February 12, 2014 Thanks guys, I am amassing a nice set of assembly photos that I shall post shortly! I obtained a swiss pinion and fitted it yesterday, but having a hard time adjusting it. I can turn the eccentric adjuster to the recommended 2/3 tooth depth and the chrono works nicely, however when I stop the chrono the watch stops (with the second hand always at the same 10s mark) after a few minutes. If I adjust the adjuster to give me a smooth running watch the chrono does not run. I have gone back and forth on this many times. I have a good amplitude on the balance and without the oscillating pinion installed the watch is running beautifully. Any ideas? Thank you Phil Quote Link to comment Share on other sites More sharing options...
philbone Posted February 22, 2014 Author Report Share Posted February 22, 2014 Ok - got it working better. It is now keeping good time although sometimes the watch just stops running and needs a jolt to get it going again. It always stops with the second hand pointing at "10 seconds". This happens about once every 36 hours. The actual hands are free and not obstructed. Any troubleshooting tips would be most welcome? Thank you Phil Quote Link to comment Share on other sites More sharing options...
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