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Old 30 May 2019, 10:51 PM   #1
Ashton_Horologist
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Daytona Strip Down & Rebuild - Step By Step

The Daytona is arguably the hottest watch on the market right now, so I thought I would guide the forum through the overhaul procedure of one. This is the 4130 Rolex movement, not the modified Zenith.

IMG_2862-768x586.jpg

We are going to go straight to the dismantling process on this one, and follow along with a step by step rebuild. The movement has been through the cleaning machine and is now separated in the parts tray.

IMG_2775-768x663.jpg

Here we see the mainplate. I have installed the column wheel and spring.

IMG_2779-768x707.jpg

I now install more of the chronograph components. The operating lever, which starts and stops the running of the chronograph, as well as the reset lever are installed and lubricated.

IMG_2783-768x743.jpg

Next, the gear train is installed. I put the escape wheel, 4th wheel, and 3rd wheel in place, but not the center wheel just yet. The 4th wheel of this model has actually been updated and given 'spring loaded' teeth on the top pinion to help with amplitude losses when the chronograph is running. Newer models come with that wheel installed. It is also upgraded at service when taken to RSC. There is nothing inherently wrong with the old wheel, it is just a more traditional chronograph style, whereas the new wheel does improve performance with the chronograph engaged. However, I have my own thoughts on that upgrade!

IMG_2784-768x773.jpg

The balance stop spring is then installed. This is the spring used that stops the watch when the time is set. It connects to the setting lever on one end, and when the crown is pulled out the spring engages the balance and the watch stops.

IMG_2785-768x747.jpg

I can now install the center wheel.

IMG_2791-768x705.jpg

Before the bridge is installed we need to make sure the crown wheel is placed underneath. There is also another small bridge that is affixed to the underside of this bridge, but I forgot to photograph that after it was in place.

IMG_2789-768x576.jpg

The barrel is put in place and both the barrel bridge, train wheel bridge, pallet fork, and balance are installed. The ratchet wheel is then screwed onto the barrel.

IMG_2842-768x675.jpg

All the winding and hand setting components are put in place so we can wind the watch and check the hand setting functions.

IMG_2792-768x791.jpg

The start/stop functions of the chronograph are where they should be, but now the actual wheels and pinions need to be put in place. The clutch wheel goes in, so do the lever that controls it as well as the spring. Does this look familiar? It is a very similar setup to the classic Seiko chronograph.

Rolex-Daytona-1-768x566.jpg

The spring and screws are put in place.

IMG_2844-768x548.jpg

The hour and minute recording wheels, along with the intermediate pinions, are added.

IMG_2845-768x719.jpg

Then the chronograph seconds wheel is put in place and so is the reset hammer. The chronograph seconds wheel has also now been upgraded to have those "spring loaded' teeth discussed earlier. The reset hammer acts against the heart-shaped cams on the tops of the wheels which allows the hands to reset to zero when the pusher is pressed.

IMG_2848-768x579.jpg

The bridge to secure all the wheels in place is then installed.

IMG_2849-768x530.jpg

The automatic winding work is then assembled.

IMG_2794-768x554.jpg


The dial and hands are installed and the watch is cased up.

IMG_2864-768x903.jpg
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Old 30 May 2019, 10:57 PM   #2
Art 1
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This is very good thank you. I’m looking forward to reading through this.
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Old 30 May 2019, 11:17 PM   #3
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Thanks Ashton, I love posts like this.
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Old 30 May 2019, 11:24 PM   #4
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Awesome, what's the total number of part's in the watch
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Old 30 May 2019, 11:24 PM   #5
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Great post. Love to learn information on the movement.
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Old 30 May 2019, 11:25 PM   #6
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Great post. Thanks for sharing.
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Old 30 May 2019, 11:26 PM   #7
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Wow. Amazing! What a truly great post to read! Pictures, as they say, are indeed worth a thousand words!
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Old 30 May 2019, 11:28 PM   #8
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Thank You! That was fun to follow!
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Old 30 May 2019, 11:31 PM   #9
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Great stuff. Thanks for sharing.
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Old 30 May 2019, 11:34 PM   #10
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Excellent! Thank you
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Old 30 May 2019, 11:47 PM   #11
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Are those wheels made of gold? What are they worth? Just kidding. Great post, thank you! 4130 is a terrific movement. So compact. How would you compare it to the Zenith from a maintenance perspective?
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Old 30 May 2019, 11:51 PM   #12
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good job
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Old 30 May 2019, 11:55 PM   #13
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Great job!
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Old 31 May 2019, 12:15 AM   #14
Ashton_Horologist
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Quote:
Originally Posted by BobDyl View Post
Are those wheels made of gold? What are they worth? Just kidding. Great post, thank you! 4130 is a terrific movement. So compact. How would you compare it to the Zenith from a maintenance perspective?
Solid 24k!

Honestly, it is much easier to service than the Zenith. It's a very straightforward chronograph the 4130.
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Old 31 May 2019, 12:28 AM   #15
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Amazing post, thanks for sharing! I'd love the opportunity to take apart a movement some day.
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Old 31 May 2019, 12:31 AM   #16
Ashton_Horologist
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Quote:
Originally Posted by Mbbgysam View Post
Amazing post, thanks for sharing! I'd love the opportunity to take apart a movement some day.
You should check out the Horological Society of New York classes. You have the opportunity to do just that. If you aren't in NY they do traveling education to various cities around the US and now the world.
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Old 31 May 2019, 12:33 AM   #17
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Absolutely wonderful. Many thanks for taking the trouble to share this with us. I’m truly delighted to be able to observe and understand this procedure.




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Old 31 May 2019, 12:37 AM   #18
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Quote:
Originally Posted by Ashton_Horologist View Post
You should check out the Horological Society of New York classes. You have the opportunity to do just that. If you aren't in NY they do traveling education to various cities around the US and now the world.
I do live in NYC and have been meaning to look into a class. Thanks for the motivation!
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Old 31 May 2019, 12:39 AM   #19
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Great stuff!
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Old 31 May 2019, 12:44 AM   #20
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Your posts are such enjoyable reads, thank you for providing such amazing content!
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Old 31 May 2019, 12:44 AM   #21
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Great job and much appreciated.
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Old 31 May 2019, 12:44 AM   #22
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fantastic pictures!
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Old 31 May 2019, 12:51 AM   #23
Ashton_Horologist
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Quote:
Originally Posted by Mbbgysam View Post
I do live in NYC and have been meaning to look into a class. Thanks for the motivation!
They are honestly incredible classes and you won't regret taking one. I am a little biased, however, as I am one of the instructors for traveling education!
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Old 31 May 2019, 12:51 AM   #24
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Love posts like these. Thanks for taking the time and please keep posting threads with the service/tear down pics (as the guys above have mentioned) the posts are very informative
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Old 31 May 2019, 01:04 AM   #25
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Quote:
Originally Posted by Ashton_Horologist View Post
You should check out the Horological Society of New York classes. You have the opportunity to do just that. If you aren't in NY they do traveling education to various cities around the US and now the world.
Have you taken this class before? It's worth attending? I'm close enough that I can attend the NYC one and am very interested.
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Old 31 May 2019, 01:14 AM   #26
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Have you taken this class before? It's worth attending? I'm close enough that I can attend the NYC one and am very interested.
I've never taken the class, but I do teach the class. Haha. It is honestly very good, all the participants absolutely love it. I have never taught in New York, but I am an instructor for HSNY traveling education in Canada.
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Old 31 May 2019, 02:43 AM   #27
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Beautiful photos and descriptions. Thanks for sharing.
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Old 31 May 2019, 03:02 AM   #28
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Awesome! How long did it take?
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Old 31 May 2019, 03:09 AM   #29
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Impressive


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Old 31 May 2019, 03:12 AM   #30
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Good stuff Ashton
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Rolex uses rare elves to polish the platinum. They have a union deal and make like $90 per hour and get time and half on weekends.
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