Repair guide · 14 chapters

DIY Seiko 7S26

A novice-friendly tutorial for disassembling, cleaning, and reassembling the Seiko 7S26 automatic movement. Started by Nicholas Hacko in August 2011, still in active use by thousands of horology hobbyists worldwide.

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Chapter 1

DIY Seiko 7S26 — Chapter 1

VIDEO #1: The 10 essential watchmakers tools VIDEO #2: How to select, shape and sharpen screwdrivers?

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Chapter 2

DIY Seiko 7S26 — Chapter 2

VIDEO #1: The 10 essential watchmakers tools VIDEO #2: How to select, shape and sharpen screwdrivers?

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Chapter 3

DIY Seiko 7S26 — Chapter 3

FAQ Q: "Tools you've recommended are no longer available from the seller." A: Find another seller.

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Chapter 4

DIY Seiko 7S26 — Chapter 4

Pulling a watch apart - and even putting it together - is not that difficult at all.

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Chapter 5

DIY Seiko 7S26 — Chapter 5

This quick tutorial is not specifically prepared for DIY members, but to all subscribers.

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Chapter 6

DIY Seiko 7S26 — Chapter 6

On the same day I also received the basic tool kit.

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Chapter 7

DIY Seiko 7S26 — Chapter 7

To refresh your memory: a 7S26 movement consists of 5 major units.

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Chapter 8

DIY Seiko 7S26 — Chapter 8

We will get back to that during assembly.

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Chapter 9

DIY Seiko 7S26 — Chapter 9

In addition, the last step is to pull apart remaining components in the time and calendar setting assembly.

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Chapter 10

DIY Seiko 7S26 — Chapter 10

Before you undertake disassembly of the mainspring barrel note the following: - If you are working on a brand new watch then your mainspring is FINE and it does not need re-lubrica...

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