I just got an OP 114300 ARF with a SH3132 movement. A great looking watch, but I noticed that it loses time a bit more than I'd like. Using a timegrapher software, I've found out that when laying flat, it loses 10s/d, when placed crown up, it's -20s a day, and with crown down, -25s a day. While just wearing it, I see around -20s/d, which seems a bit much. Is it difficult to adjust this movement to run a bit faster? Does it have the same gen-like system with those tiny screws on the balance wheel, or is it something simple like moving a single screw, or pushing a small lever? Even if it's simple to do, should I bother trying, or should I send it for service - I know that it's generally not a good sign when the movement is losing this much time?
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How difficult is it to speed up/regulate a SH3132 movement?
- Thread starter KilowattHour
- Start date
I'd say with access to a functioning timegrapher software you can have a try, you have to loosen the marked screw a bit and then slightly, but really slightly (!!) move the marked lever away from the other one, this will shorten the effective spring length and speed it up. Don't touch the other lever because this changes the position of the spring and has effect on the Beat Error. When done, don't forget to tighten the screw again.
Thank you so much! That seems easy enough for me to try.I'd say with access to a functioning timegrapher software you can have a try, you have to loosen the marked screw a bit and then slightly, but really slightly (!!) move the marked lever away from the other one, this will shorten the effective spring length and speed it up. Don't touch the other lever because this changes the position of the spring and has effect on the Beat Error. When done, don't forget to tighten the screw again.
about getting the back open.. rolex back tool, I find that putting the jar opener grip rubber sheet in between the tool and the caseback helps prevent scratches from slippage.
hanski
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- 25/4/18
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The mechanics are easy but it's going to take time and care to execute. When miscusi says move it a small amount - for a 10-20 sec adjustment think less than 1mm movement.
Give it a full wind, let it settle, and take a reading on your timegrapher before doing anything. When you move that lever, apply pressure in line with the rotation of the lever, NOT diagonally downward. Don't touch the balance spring. Avoid touching the other lever (it controls the beat error). After each adjustment, let it settle then check on the timegrapher. If it's consistently losing 20-seconds a day, aim to adjust the lever to give you a reading of 20-seconds greater than your preliminary reading.
good you mentioned that, pretty easy to slip when opening by hand !
I was going to try the rubber ball first, and then if that doesn't work, to try to use the bespoke tool. Do you think it is going to be fruitless to even try the rubber ball? The rubber sheet that you've suggested - I assume it should be a thinner one? I see these sheets being sold in various thickness.
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hanski
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https://www.esslinger.com/watch-case-opening-friction-ball-watch-back-opener-tool/
Usually works fine with reps.
All I was saying is that the tool I had been using for over 20 years, sometimes slips and mar the caseback. so I put this piece of green rubbery jar opener grip sheet in between, the tool still gets a good solid grip on that coin edge thingy, no marks on the caseback...
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It seems I'm about 6 months late to this party, but I appreciate the information. I've been thinking about buying a watch with an SH3132 movement, but am concerned about how to regulate it if needed. Nice to know it's relatively simple. Thanks for the information guys.