Cooey 39

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pmarcott

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I need a little help. I am trying to disassemble the bolt on my Cooey 39 to fix a broken firing pin. I am looking for a spanner wrench or an idea on how to seperate the bolt halves.

Thanks

Paul

pmarcott@telusplanet.net

Thanks
 
You will probably be better off checking the Equipment Exchange and seeing if you can get a whole new bolt. Because you are probably not going to find a firing pin. But if you must take the bolt apart, a pair of snap ring pliers with the right angle tips might work. Usually available at some of the discount tool outlets. Good luck.
 
I am getting light strikes and misfires with my new-to-me model 39. I'm going to take the bolt apart and stretch the spring. I'll let you know what works for me.
 
Often times with age and use, the two halves are hard at best to seperate. If you are lucky enough to get that far, a wrench can be made out of a piece of thick wall tubing. You will have to file one end so that there are two opposing teeth left. Depending on the hardness of the tube metal, you may have to harden the teeth once you're done. A new firing pin can be made out of a 1/8th drill bit. Pay close attention to length and striker profile. It may take several attempts.
 
Stretching a spring usually does nothing towards a permanent solution.

Misfiring with a Cooey 39 usually is a headspace problem and solved with a new bolt or having the old one adjusted (machining and soldering a shim) so it fits closer to the chamber. A Cooey 39 bolt should close on an empty chamber with a little resistance.
 
I've got a complete bolt I'm not using anymore if you are interested.
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Last edited:
muskwa said:
I am getting light strikes and misfires with my new-to-me model 39. I'm going to take the bolt apart and stretch the spring. I'll let you know what works for me.
Click to expand...

Stretching a spring doesn't help you.

Get a steel dowel pin that fits well inside the spring.
Put the spring down onto a steel plate or the flat on the back of your vise.
Rolling the spring, tap it lightly with a hammer over the entire length.
Start in the middle and work your way towards both ends.

This lengthens the spring without stretching it and is about the only way to do it for a permanent fix.
 
Thanks
I think I will go the new bolt route. But I will make a spanner wrench to separate the two halves.
I found a gunsmith shop that has firing pins available.
It is always fun to create new tools in the shop.
 
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