Seiko 6139 second hand issue

[RyanGreerMcGilloway]

Hi all... recently brought this seiko 6139 and notice the second hand would not reset to 12. It’s always quite erratic.

 

I have tried to rest the hands and push the hand down for more friction, however when I now rest it now, it occasionally flys off and I have to rest it and doesn’t always go back to 12..

 

is there a specific way I need to install this, is the second pinion a square as some people have said or is it just a case of the second hand being over used and stretched too much

[Poljot]

1 hour ago, RyanGreerMcGilloway said:

Hi all... recently brought this seiko 6139 and notice the second hand would not reset to 12. It’s always quite erratic.

 

I have tried to rest the hands and push the hand down for more friction, however when I now rest it now, it occasionally flys off and I have to rest it and doesn’t always go back to 12..

 

is there a specific way I need to install this, is the second pinion a square as some people have said or is it just a case of the second hand being over used and stretched too much

Hard to diagnose remotely... If it's very easy to remove and if it comes loose - then most likely you need to tighten the hand's tube. Ask the previous owner...

[Khan]

Hi

First of all, check if it's an original hand? Replacement hands can be a headache sometimes. 

I recommend you to tighten little by little. In case of over-tightening, it won't even install and then you may have to file it with oil to widen inside the tube and the tube can become thin and loose its strength. 

[Melt]

The pinion for this centre second chronograph hand is not round but has two flat sides and unless you put the hand back in the same position (or 180 degrees) it will deform the pipe and come loose. 

6139B.pdf