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Rich9
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Rich9 New Member

Rich9

Posted
Posted

Hi all,

Been tinkering with a old mechanical movement, when reassembling, the wheel train through to the escape wheel moves freely when turning the barrel, when the pallet fork and bridge is inserted and the mainspring wound, it doesn't flick between both small pins though... the mainspring can be fully wound and released so a little puzzled!

Any advice would be appreciatedĀ šŸ‘

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Nucejoe Distinguished Member

Nucejoe

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Does fork arbour have any end shake?Ā Ā 

With zero end shake the fork isn't free to move, an easy test is to loosen the fork's bridge screw a turn or two. Bent fork pivot also hinders forks movement. Check jewels for forks pivots .

Nudge the fork to see if it snaps from side to side, misaligned pallets might hinder forks movement, orĀ  pallets having moved in the forks slot unlocking of pallets can be hindered.Ā 

Rgds

Ā 

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JohnR725 Distinguished Member

JohnR725

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10 hours ago, Rich9 said:

old mechanical movement

pictures are nice description of what it is and its condition. In other words you've serviced did the watches of working that sort of thing?

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watchweasol Distinguished Member

watchweasol

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Hi Ā did the watch run before you serviced it ? Ā If the train wheels are free up to the escapement Ā and ore not after introduction of the pallet thatā€™s where the p4oblem lies, is the pallet installed correctly is there s bent pivot, cracked jewel. Untill the freedom of the pallet can be ascertained we have a problem. Ā  You could removes all the train wheels and the balance and just fit the pallet and bridge again on its own after inspecting both pivots and jewels. Using a fine artists brush move the pallet side to side it should move with very little effort.

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