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Post by Deleted on Nov 12, 2013 18:07:20 GMT -8
Here it is with some preliminary photos... Not too shabby for what I paid. It's not as scratched up as the picture makes it look. This greeted me when I removed the case back. Popped the movement for a better look. Yuk; whale snot! More crud and congealed oil everywhere :-( The oil was the consistency of wet glue. The dial is nicely patina'd. So, the watch obviously didn't run. The oil had thickened so much that the balance was almost unmoveable and when I took the tension off the mainspring, it unwound so slow I thought it was already unwound but it kept slowly going for about 30 seconds. Apart from the whale snot on the rotor and a little around the edge of the plates, it's only the thickened oil that is causing any problems. This will be an easy fix. I have the whole thing in parts and soaking in cleaner. The dial is so nice and I won't need to touch it. The hands will get some attention and a relume. The bezel could probably use a cleaning but it does turn with nice healthy clicks. The case will get a gentle cloth polishing and that will be it. Inside the case back are markings from 2003 and 2005. I'm guessing the last guy didn't use proper watch oil :-( When I reassemble the movement, I will try and remember to take photos along the way so I can do a 7002 service thread for everyone to follow.
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Post by Groundhog66 on Nov 12, 2013 18:21:22 GMT -8
It's definitely a bit messy, but I have confidence that you'll do it justice. I'd consider just cleaning up the hands a bit, might not need a relume.
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sdoocms
Is a Permanent Fixture
Carl
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Post by sdoocms on Nov 12, 2013 18:46:42 GMT -8
TSK, tsk, tsk, you are going to have entirely too much fun cleaning off the whale snot! Can't wait to see the finished product!
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Post by J. F. Sebastian on Nov 12, 2013 19:03:06 GMT -8
Any idea what the whale snot stuff actually is?
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Post by Deleted on Nov 12, 2013 19:53:44 GMT -8
Any idea what the whale snot stuff actually is? I suspect it is a by product of sea water and whatever plating is put on the weighted portion of the rotor. I've seen this several times before and it's always the same and only develops on that part of the rotor. I've never seen any other parts of a movement affected like this. The strange thing is that there is none of the usual indicators that the watch had leaked. No rusty parts, no water marks on the dial or inside the crystal and the lume on the dial is dry and nicely aged rather than all puffed up like cauliflower.
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Post by seikoholic on Nov 12, 2013 21:20:11 GMT -8
The corrosion pulls out the copper in the alloy. Nice stuff.
Yeah, looks like he used the old mineral oil. I last saw that in a 7A38 that looked perfect but wouldn't run at all. Under 10x magnification I could see what looked like lubrication in the pivots, but it was like syrup on a cold day. THAT was a fun rebuild.
Let me know if you need anything but I'm sure you've got it well in hand.
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Post by Deleted on Nov 12, 2013 23:25:53 GMT -8
The corrosion pulls out the copper in the alloy. Nice stuff. Yeah, looks like he used the old mineral oil. I last saw that in a 7A38 that looked perfect but wouldn't run at all. Under 10x magnification I could see what looked like lubrication in the pivots, but it was like syrup on a cold day. THAT was a fun rebuild. Let me know if you need anything but I'm sure you've got it well in hand. Spencer, your description of syrup on a cold day is perfect. There is so much of it though that it was wicked allover the underside of the top plate, the bottom of the barrel and the palette fork was glued to it's bridge. That makes sense since the snot is the colour of oxidized copper. I scraped most of it off and have the rotor soaking. It should clean up nicely. I may even be able to restored the brushed marks around the perimeter. The little bit of crud that was on the main plate came off with a tooth pick so it was just sitting there and not actually reacting with the plate material. All that thick oil has acted like a preservative and all the parts I removed look like new chinathumbsup.gif
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Post by dad-the-diver on Nov 12, 2013 23:55:58 GMT -8
wonderful dial mate chinathumbsup.gif
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Post by 69ChevelleSS on Nov 13, 2013 7:44:26 GMT -8
Should be a nice little piece when she's all done with her spa treatment! Congrats on a nice find!
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Post by Deleted on Nov 13, 2013 16:21:29 GMT -8
Thank the watch gods for commonality between Seiko calibres. While cleaning up and inspecting the 7002 parts; I discovered that the centre wheel is hooped :-( The pinion fell out of the wheel in the cleaner... As you can see, the wheel has a crack in it and the cogs on the gear that is driven by the barrel are all rusty. A couple of them are too far gone even if the pinion was still in the wheel. It should look like this one... A nearly perfect one from a 7009 donor. They share the same part number so the project will move ahead. I just have to put the 'new' centre wheel in the cleaner for a while to soften up the hardened lube(the brown stuff). All the other movement parts(excluding the rotor) came out looking like brand new chinathumbsup.gif The 7002 may be the most simplified of the 7xxx series of movements but it is no less capable nor less well built than the others. Also, it is a joy to work on. I will endeavour to do a thorough pictorial of the movement service for anyone who wants, to follow.
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Post by seikoholic on Nov 14, 2013 10:17:20 GMT -8
Go man go!
As I've said many times, my 7002 is one of the best timekeepers I have. Once up to power, it puts out a flat line on the timegrapher with amplitudes in the 240-250 and up range. It's a rock.
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donciccio
Is a Permanent Fixture
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Post by donciccio on Nov 14, 2013 14:23:09 GMT -8
I love threads like these. thunbsup.gif
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