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  1. Oops, missed the reply - sorry. Been enjoying the threads and generally looking about the place. Been fettling watches for a couple of years as a hobby, and now I have taken early retirement, I decided to become more proficient at it, still as a hobbyist though. But something to keep the old grey cells active and test the dexterity! I attended the basic manual and automatic courses at the BHI over the last couple of years, under the tutelage of the excellent John Murphy, who really gave me the confidence to keep at it. Still a member of the BHI as well. just starting now on my first really complicated movement, a Valjoux 7750 I got off eBay, with a faulty 12 hour recorder (does not reset and runs continually). And as far as I can see, without yet having disassembled it, it does not automatically wind. The rotor turns and the winding gears turn, but I can’t see the barrel turning. I’m hoping to slowly learn the 7750 as I take it apart, see what’s faulty, clean and repair, reassemble and, hopefully wear it. I have found the excellent set of PDF walkthroughs here on the forum and I know they well help greatly. That’s me folks...
  2. Hello All. I currently use a small ultrasonic cleaner from James Products. It is about 500ml, 42kHz and about 50watts of cleaning power. I have been using this with warm water in it. In the water I have been using glass containers containing clean Renata Essence as the cleaning medium. After cleaning the pivot holes/jewels with peg wood, the watch parts placed are then inside the jars with the Essence. I Then run the ultrasonic for about 5 minutes and then take the jars out. The parts are then individually removed and given a blow dry (with a bulb puffer) and then stored in my parts trays until needed for re-assembly. My questions are: 1 - Is this a good enough? 2 - Would I get better results from using a proper watch cleaning fluid? (what would be recommended?) 3 - If using a watch cleaning fluid, would I need to then use a rinse or final finish of some kind? (Again, recommendations, if yes.) I am looking out on t'internet for a second-hand watch cleaning machine and there are a few about sometimes, typically for around £100 for an old but useable machine. Are these likely too be good value, or am I better off with what I am doing? I'm retired (early) and only doing this as a hobby, so I have time on my hands to do things the long way, but also have a (little bit) of money for a suitable watch cleaning machine, should something come up. Sorry for lots of questions, but I want to do the best job I can with cleaning. Cheers Moose.
  3. To answer a few questions and make notes as I go... The shock system looks to be standard Incabloc, in that it has the normal lyre shaped shock spring. The plate has the VAL logo under the balance and 7750 to the left of that near the escape wheel. Interestingly it also has stamped text as a 25 jewel movement. I’m not sure that ALL Valjoux movements were 17J, only the first incarnation of it, later models being 24J or 25J. Anyway, I wore it all of today with no issues (other than those stated) and timekeeping was accurate enough over the day, only gaining a little. So - for now its back in the box until next week as I am away now until Monday. Then I will start do document the disassembly and not any faults / issues found, prior to cleaning and ordering of any needed parts. As another question before I start. As I am new to servicing 7750, I have glanced at the ETA service instructions and noted some very intricate settings, clearances and tolerances being applied to certain parts. In practice - what is recommended by you guys, without purchasing feeler gauges etc. With regards setting up these items? Or do you really need to properly measure and adjust? TTFN. Regards - G
  4. Thanks for the encouragement. I left it running overnight and timekeeping is actually OK. So I guess it just had not run for a bit. It still has a very low amplitude ( under 200) so certainly a very sticky and gummed up gear train. Activating the chrono virtually kills the amplitude and it runs, but not reliably. Again, likely just gummed up and needs a good clean. The hour recorder runs all the time and won’t reset, so that’s something I need to investigate. Hopefully I’ll find out what the issue is during the strip down. I’ll likely start getting it stripped down next week, checking for damaged parts and ordering up spares for anything too far gone (the fine adjuster on the regulator looks too far gone with corrosion), and I’ll likely order a new barrel complete, rather than strip and clean the old one. I think I might do a set of photos, at least for my own benefit, as I have been meaning to do a “before and after” sequence on the last few watches I have done, but just never got around to it. So before I start stripping it, I’ll write these initial observations down as part or the before and after “story”.
  5. Hi all. i have just acquired a fixer-upper, 7750 based chronograph. It has a Valjoux 7750 in it - as in - a pukka Valjoux badged version. Basic question is - is it likely to be much different from the ETA version? Im guessing not, to the degree that a standard ETA 7750 service manual will do the job. it does not look to have too much work needed, at first glance anyway: The hour recorder does not reset, rotor does not seem to wind the mainspring, but most of the visible winding gears seem to be turning, manual winding is fine. Chrono starts, stops and resets OK ( but not the hour recorder). Timekeeping runs fast, but this seems typically indicative of a visually very low amplitude balance, most likely due to lack of servicing. Otherwise a bit of corrosion on the regulator and not much else. this will be my first 7750, so looking forward to the challenge.
  6. As a matter of interest, may I ask which replacement heater did you use? Would a spare from an almanac work? ( I realize this is an old post, but hopefully an answer is possible.)
  7. Been doing the courses and now joined here. Watch repair is a hobby for me, as I just like the challenge of working on small, intricate mechanical and electronic things. I have always had an interest in mechanical watches and now I have retired, there is time to fully indulge my hobby. Regards G.
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