$2.00
You Saved
This is a genuine yoke designed for ETA 2824-2, 2834-2, and 2836-2 automatic movements, with part number 2824/2834/2836-435, Article 7, Made in Switzerland. The yoke is a key component in the keyless works, responsible for sliding the clutch wheel on the winding pinion to achieve precise crown position changes (winding, date, time). As an original factory part, it is the ideal choice for replacing worn or damaged yokes during service or repair.
Normal Function：The yoke slides back and forth under the setting lever, pushing the clutch wheel to engage with either the winding pinion or the date wheel, changing the crown position.
Failure Symptoms：Worn or deformed yoke causes: vague position detents, slipping between positions, inability to wind or set time properly.
Maintenance Advice：Inspect the yoke‘s contact surfaces and spring for wear or deformation during each movement service.
Disassemble Keyless Works：Remove the movement, take off the automatic module, and remove the keyless works bridge.
Remove Old Yoke：Loosen the fixing screw and carefully remove the old yoke (-435).
Clean：Clean the mounting slot and related parts – remove old oil and debris.
Inspect Related Parts：Check the setting lever, clutch wheel, and winding pinion; replace if worn.
Install New Yoke：Place the new yoke in position, ensuring its tail spring correctly engages the mainplate slot.
Test Function：Reinstall the keyless works bridge and test crown position switching for smoothness and distinct detents.
Lubricate：Apply a microscopic amount of oil (e.g., Moebius 9010) to the yoke‑clutch wheel contact points.
Final Test：Verify winding, date, and time setting functions before final assembly.
Important Note：Ensure the yoke spring is properly seated; otherwise, position switching will fail. Professional installation by a watchmaker is recommended.
Inspection Period：During each full movement service (every 3‑5 years), inspect the yoke‘s contact surfaces and spring tension.
Wear Indicators：Worn yoke causes vague position detents, crown slipping, or failure to stay in position.
Cleaning Method：Clean movement parts with specialized solution and ultrasonic cleaner – do not use corrosive cleaners.
Replacement Criteria：Replace immediately if contact surfaces show significant wear, or the spring is deformed or broken.
Note：When replacing the yoke alone, use factory‑specified lubricant.
Q1: What is the function of the yoke in an ETA 2824 movement?
A:The yoke moves the clutch wheel under the setting lever, engaging it with either the winding pinion (winding position) or the date wheel (date position), enabling crown position switching. Without a functioning yoke, the crown cannot properly change functions.
Q2: Is the yoke the same part as the setting lever?
A:No. The setting lever (part 2824‑443) controls the yoke‘s position; the yoke (-435) directly pushes the clutch wheel. They work together to achieve position switching.
Q3: Can I replace the yoke without replacing other keyless works parts?
A:Yes, but it‘s advisable to inspect the setting lever, clutch wheel, and winding pinion at the same time. If those parts are also worn, replacing only the yoke may not fully restore crisp detents – wear is often synchronized.
Q4: How do I know if my yoke needs replacement?
A:Common signs: vague detent feel when pulling the crown, crown automatically returns to winding position, or slipping when setting time/date. Inspect the yoke‘s contact surface under magnification – replace if you see a noticeable wear groove.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
Trusted by watchmakers worldwide.
Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.
