cooey bolt

C

corney

CGN frequent flyer
Rating - 100%
18   0   0
Anyone know of a link on how to tear down a single shot cooey bolt?

I am a visual guy and need lots of pictures.

I even have parts thanks to a member on bits and pieces.

thanks
 
Well you didn't say why you want to take it apart but I assume its miss firing. 9 out of 10 times its head space and that's new bolt time. I never bother to take them apart anymore. It is usually cheaper and easier to replace the bolt than try to repair em,
 
Pull the two halves of the bolt apart, on the one halve you see a slotted nut which holds the spring in place, you have to make a little tool with two prongs to fit that nut.
I have a parts diagram and it shows the complete bolt has one part number, they recommended against taking the bolt apart, but it can be done.
 
The biggest problem I have been having is they are gummed up from 40 years of lack of cleaning and the firing pin doesn't work well because of the build up. Thanks for the responses.
 
corney said:
The biggest problem I have been having is they are gummed up from 40 years of lack of cleaning and the firing pin doesn't work well because of the build up. Thanks for the responses.
Click to expand...

Leave the bolt assembled and soak the whole thing in solvent or naptha to degrease it. The gummed up oil will wash out with some soak time and a little swishing in the can of solvent.
 
You may be able to adjust head space by grinding away a little of the bolt handle (or build it up with solder). Can achieve a lot though by working the bolt with solvent and compressed air. There is a thread with pics here somewhere by hwally (I think) who took one apart.
 
"...because of the build up..." Get a small foil roasting pan or any large can. Fill it with solvent, drop the whole bolt in and leave it there for 24 hours. Blow it out if you have air. Canned air is expensive stuff, but you can get it in a computer or electronics shop. Brushes and pipe cleaners otherwise.
Neither grinding the bolt handle nor solder will do anything to the headspace. Solder is too soft and the handle has nothing to do with headspace. You don't need to adjust the headspace anyway.
 
Great advise. I have a parts washer and air compressor and will do just that. Appreciate that I don't have to take them apart. Even as a kid I was great at taking things apart, not so good at getting them back together:redface:
 
sunray said:
"...because of the build up..." Get a small foil roasting pan or any large can. Fill it with solvent, drop the whole bolt in and leave it there for 24 hours. Blow it out if you have air. Canned air is expensive stuff, but you can get it in a computer or electronics shop. Brushes and pipe cleaners otherwise.
Neither grinding the bolt handle nor solder will do anything to the headspace. Solder is too soft and the handle has nothing to do with headspace. You don't need to adjust the headspace anyway.
Click to expand...

You may also want to work the bolt a bit and not just let it set to get solvent moving / working between the moving /telescoping parts. If you set an air compressor to 70psi then will roughly the same as canned air.

Headspace is created by the distance the bolt face is from the head, where the bolt handle slides in its notch to lock the bolt effectively sets the headspace - changing the dimensions of where the handle fits in the notch (or the relationship of the handle to the bolt face) effectively changes the headspace (are moving bolt forward or back). Grind off the front, build up the back, reduce headspace. Grinding off the back, build up the front increases the headspace (we added material by welding).

If bolt from different rifle (and 50+ year old Cooeys have mix and match potential) there may be headspace issues.

Have not had any firing pin / FTF issues after a good cleaning, if anything the extractor may be an issue (remove by bending out a bit and sliding forward, is a little knob on the extractor that mates with the bolt).
 
You must log in or register to reply here.
Back
Top Bottom