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Just wondering if anyone out there would have any advice for me before I take it to a gunsmith. I bought an older cooey single shot 410 (worked when I bought it). I had the barrel and receiver re-blued. When I got it back and put it together ... the hammer won't lock in the "cocked" position. If I take the barrel off, I can pull the hammer back, and it locks in place like it should. I am stumped ... because these are very simple guns. Any help would be appreciated.
 

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no left over parts ?? any particular thing give you a hard time when you put it back together ?? annnd, the biggest queshun... were you holding your tongue just right when you put it back together ??
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If it FAS (functions as should) with no barrel, then doesn't with the barrel, then ..possibly seems like the issue is with your barrel lock up in the bottom of the receiver ??
 

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give ol joe a chance to google up a fix..he'll chime in
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Discussion Starter · #4 ·
I never actually took the receiver apart. By putting back together ... I meant attaching the barrel to the receiver and then attaching the fore stock. I tried googling it. It appears it has something to do with the lock up mechanism at the bottom of the receiver. Joe has a few of those old cooey's. He might know the answer.
 

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Mine sometimes does this as well. I find that if I close the gun with a bit of authority, it always works.
 

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I would look at the relationship of the locking block and barrel lug notch and what allows the hammer to come to cocked lock position .
 

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I never actually took the receiver apart. By putting back together ... I meant attaching the barrel to the receiver and then attaching the fore stock. I tried googling it. It appears it has something to do with the lock up mechanism at the bottom of the receiver. Joe has a few of those old cooey's. He might know the answer.
I have seven. A set of six 84's from 410 to 12 ga 36" barrel and one 840 in 28ga

LOL I collect shotguns in sets or did years ago
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Honestly they are pretty much bullet proof and I would say a smith would be shaking his head quite a while to fix it assuming not dirty , sticking or something broke he could see

Make sure all springs etc are clean etc and everything moves as it should with the barrel off. You never soaked it did you in anything when preparing for bluing

https://www.gunpartscorp.com/gun-manufacturer/winchester/shotguns-win/37a-win

That being said I have seen it but twice in clean guns with no broken parts and both times was when different barrels had to be fitted to a receiver never on a gun with a matching factory barrel

You said the receiver has never been apart so I assume it got a cold bluing and not a factory type and total disassembly

If so you would have removed the old finish and added new blue which may have been enough of a change between the two pieces involved to cause this since we are talking thousands here to make it do it.

My guess if nothing sticking or broken is the face on the v on the barrel lug has to be filed but not a lot

Not my words but this guy explains it pretty good., But I would not file the locking thing at this stage

If you're fitting a new barrel to a gun that already has one and you plan to switch them now and then, you need to file off just the slightest part of the face of the lower side of that V on the barrel. Just two or three filings and a test fit. Do NOT file a lot!!! Two or three filings and then test fit. When you get it to the point that it closes clean, try cocking it. The same V is blocking the locking block and preventing it from closing or cocking. If you plan to mount a new barrel and never switch it, then file on the face of the locking thingymabob instead of the barrel. That locking thing and the matching face of the barrel lug are what's blocking you. So again, if you plan to mount a new barrel and switch it out regularly, work on the barrel. Fit the barrel to the gun. If it's a one time and leave it switch, then work on the locking thingy. Fit it to the barrel. Two or three filings then test fit.
 

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you say - the hammer wont lock in cocked position - is the hammer coming back all the way? Meaning, does it come back as far as when it does cock with barrel off?
 

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Discussion Starter · #10 ·
Gary ... the problem arises when I attach the barrel to the receiver. When the barrel is attached to the receiver ... the hammer doesn't appear to go back far enough to lock in the cocked position. Take the barrel off ... and it works perfectly. It obviously has something to do with the barrel locking mechanism.
 

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Gary ... the problem arises when I attach the barrel to the receiver. When the barrel is attached to the receiver ... the hammer doesn't appear to go back far enough to lock in the cocked position. Take the barrel off ... and it works perfectly. It obviously has something to do with the barrel locking mechanism.
If nothing is broken or sticking it is the tolerance on the v groove barrel lug that has to be refitted

Cooey factory receivers were not blued and it doesn't take more than a few thousands to cause what you have going on now. Yes a factory bluing would be nothing not even one thousand as far as tolerance increase goes but not a back yard job ( anything not factory )

Just my opinion from not seeing the gun or any pics of the receiver and barrel lug

Also just noticed you didnot do the bluing. Are you 100% sure it wasn't apart

Cheers

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Gary ... the problem arises when I attach the barrel to the receiver. When the barrel is attached to the receiver ... the hammer doesn't appear to go back far enough to lock in the cocked position. Take the barrel off ... and it works perfectly. It obviously has something to do with the barrel locking mechanism.
if the hammer does not go back far enough, it sounds like the lower mechanism is sticking when you attach the barrel.

try - take forestock & barrel off. push down mechanism (where barrel locks in). It's the piece that moves when you activate the lever. If this mechanism does not spring back all the way it will not allow the hammer to cock.

It may just need some working back/forth, up/down (turn off that dirty mind, Kevin, if youre reading this) to get it working.

If that doesnt work you likely have to open up the receiver to lubricate the springs and things.

Good luck.
 

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Just wondering if anyone out there would have any advice for me before I take it to a gunsmith. I bought an older cooey single shot 410 (worked when I bought it). I had the barrel and receiver re-blued. When I got it back and put it together ... the hammer won't lock in the "cocked" position. If I take the barrel off, I can pull the hammer back, and it locks in place like it should. I am stumped ... because these are very simple guns. Any help would be appreciated.
Take it back to the person who did the bluing job and have him repair it or at least find out if he had it apart. Sounds like a thorough cleaning of the mechanism may be necessary.
 

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Discussion Starter · #15 ·
A little update ... I sprayed a little solvent in around the mechanism and oiled it. It appears that it's not locking up tight. When I shut it with a little force... the hammer works like it should. All parts seem to be functioning properly except the locking lug or whatever its called. Seems a little sticky. I will have to totally dismantle it and give it a thorough cleaning ... or just leave it as is. Like I said ... if I "snap" it shut .... it works. I have 4 other Cooey's that require very little effort to close ... and they have all been reblued. Never had an issue with either one.
 

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A little update ... I sprayed a little solvent in around the mechanism and oiled it. It appears that it's not locking up tight. When I shut it with a little force... the hammer works like it should. All parts seem to be functioning properly except the locking lug or whatever its called. Seems a little sticky. I will have to totally dismantle it and give it a thorough cleaning ... or just leave it as is. Like I said ... if I "snap" it shut .... it works. I have 4 other Cooey's that require very little effort to close ... and they have all been reblued. Never had an issue with either one.
Every one has a different fit and were hand fitted factory . This one clearly was tighter than the rest and the bluing effected it or one cannot see how dirty it is

I would have assumed the guy that blued it , blued a clean receiver and took it apart however. I guess not

Any how you are happy so all is good. If it is still hard to close and cock after a good cleaning I would be taking a bit off the v but hey that is me and it doesn't sound you are comfortable with that which is fine since you are using the gun and know to watch for it locking

Happy Holidays
 

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I would just use it a bit be for doing anything to it . it may just be that new blueing has tightened tolrances .
 

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Would bluing be that thick to cause issues?
No factory bluing might be one thousand .But we have no idea what preparation or type of coating he used

IMHO his preparation could have done it taking tolerance off an area getting ready for bluing that put more stress on another area which seemed to tighten the locking relationship tolerances

Grinding or sanding out imperfections, nicks etc or dunked the entire receiver with out taking it apart ( if that happened ) could have gunked it up

Also remember the original receiver and catch and barrel lug V were bare from the factory so could have added a few thousands total one thousand on each piece with bluing and on these fits it doesn't take much

Just guessing since to make sure one would have to see the gun

Cheers
 
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