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Watch stops when canon pinion tight

Khan

By Khan
in Watch Repairs Help & Advice

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Khan WRT Addict

Khan

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Hi

When I loose the canon pinion, it obviously doesn't turn the minute hand. When I tighten it, the watch either runs poorly or stops in a low power reserve. Movement Universal 129. What am I doing wrong? :blink:

Image attached with canon pinion displaced. 

Kind regards. 

20200513_153208.jpg

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Nucejoe Distinguished Member

Nucejoe

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probably too tight, excessive tightening in effect integrates canon and the arbour into one piece. Canon pinion is suppose to turn on the arbour it is mounted on, to set the time. first thing to do in case you haven't already is to put some oil in the canon and turn . If no good you would need to broach it.

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Khan WRT Addict

Khan

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The canon pinion is fairly easy to remove with a tweezer, so it shouldn't be too tight. :unsure:

Actually, the watch runs very good when canon pinion removed.;)

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Nucejoe Distinguished Member

Nucejoe

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If canon pinion is too tight, it sets the enitre min train  to move.

I eliminate gears from canon pinion on to the end of min train one at a time and make sure posts the gear sits on are not loose, further I grab the canon pinion , shake see if it feels loose inside the center hole.

 

 

 

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Khan WRT Addict

Khan

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On 5/13/2020 at 10:38 PM, JohnR725 said:

how does the watch run if the canon pinion is on but the minute wheel is removed?

It looks to run as good as when canon pinion removed. The watch now starts with a couple of winds. 

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Khan WRT Addict

Khan

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2 hours ago, Nucejoe said:

Could be the bridge on minute train pushing down on gears,  just to test I loosen the screws on the bridge.

I tried that and it runs remarkably better when the screws not tightened at all but just turned into place. I'm now testing the power reserve and see how it goes. 

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Nucejoe Distinguished Member

Nucejoe

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Great,  I check the min train birdge for sign of gear rubbing on it,  you can shim the bridge or attack with sand paper or a flat face chisel, whatever approach that suits you to eliminate the rubbing.

Good luck.

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