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Title: ETA 2836-2 Not Ticking After Pallet Fork Replacement – Need Assistance

TimepieceTinkerer
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TimepieceTinkerer Member

TimepieceTinkerer

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Posted

Hi all,

I’m currently working on an ETA 2836-2 movement. I replaced the pallet fork with a new one (ETA2801710, sourced from CousinsUK). After full reassembly and lubrication, I’ve encountered a strange issue:

The movement is fully wound and has power.

When I fit the balance assembly, the movement does not tick at all—completely dead.

When I remove the balance, the gear train suddenly releases and spins freely, indicating power was present.

The pallet fork just “floats” without snapping side to side—almost as if it isn’t even there. No interaction with the escape wheel is visible at that point.

However:

Before fitting the balance, I checked the pallet fork manually — it was working as it should, clearly interacting with the escape wheel.

I’ve inspected the pallet bridge jewel (where the pallet fork sits) and everything looks normal. No signs of misalignment or obstruction.

I’ve rechecked everything I can think of and I’m completely out of ideas. Has anyone seen this behaviour before? Any suggestions would be greatly appreciated.

Thanks in advance!

TT

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