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  #1  
Old 08-26-2019, 08:51 PM
majspud majspud is offline
 
Join Date: Feb 2013
Location: SE Massachusetts
Posts: 86
Default Help: carbine firing and cycling a round but not cocking the hammer?

I tried out my new-to-me 6/43 Underwood, and the strangest thing happened. The carbine fired, extracted the case, fed a new round, but did not cock the hammer. This is the 6th or 7th carbine I've had over the years, and I've never seen this before. Ammo was new Aguila. I fired a whole magazine, but to do so I had to cycle the action manually, eject a live round into my hand, and then manually seat a new round to cock the hammer. The hammer cocked only when the op rod was manually pulled back all the way. Push button safety. Magazine was in good condition.

I haven't stripped down the trigger group as I've never done so. I had a heart attack in January am unable now to do a detail strip of a Garand which I have done a few times.

Is this a sear or trigger issue? Help. See post #124 on my local shooting forum below.

t

https://www.northeastshooters.com/xe....372623/page-5
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  #2  
Old 08-26-2019, 09:27 PM
Jakeroub Jakeroub is online now
 
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Sounds like it is short cycling. Did you put a new recoil spring?
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  #3  
Old 08-26-2019, 09:30 PM
majspud majspud is offline
 
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Shot it as I got it

t
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Old 08-26-2019, 09:31 PM
Jakeroub Jakeroub is online now
 
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Quote:
Originally Posted by majspud View Post
Shot it as I got it

t
Maybe it just needs to be cleaned and lubed?
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  #5  
Old 08-26-2019, 09:32 PM
majspud majspud is offline
 
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That I did. Was fairly clean.

t
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Old 08-26-2019, 10:02 PM
6 Ring 6 Ring is offline
 
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Take out the slide spring and tell us its length.
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  #7  
Old 08-27-2019, 12:25 AM
HB of CJ HB of CJ is offline
 
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Default Function Test ...

Do an easy function test. Unload. Confirm unloaded status. Point the muzzle in a safe direction and hand rack the Carbine. Squeeze the trigger. The hammer should drop.

Continue squeezing the trigger. Hand rack again while holding the trigger down. Then release the trigger. You should feel and hear a distinct "click" as the trigger resets

If it does then the Carbine SHOULD shoot just fine. A very simple mechanism. If the trigger does not reset consider perhaps worn parts in the trigger housing group..

Might be the hammer. Might be the sear. Might be the trigger. Might be springs. We do not know yet. It is easy to change out these parts with new USGI. All fun to do.

USGI recoil springs are cheap. I would also consider a spare trigger housing pin. Also cheap. It is unlikely your Carbine has a clogged gas port. Very low probability there.

I find this fiddling with USGI M1 Carbines much fun and relaxing. Others not so. Hope this helps. I use Fulton Armory for my parts needs. Also this excellent forum. Enjoy.
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Old 08-27-2019, 06:45 AM
Jakeroub Jakeroub is online now
 
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Quote:
Originally Posted by HB of CJ View Post

Continue squeezing the trigger. Hand rack again while holding the trigger down. Then release the trigger. You should feel and hear a distinct "click" as the trigger resets
an excellent recommendation. This procedure will tell you everything you need to know.
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  #9  
Old 08-27-2019, 06:55 AM
majspud majspud is offline
 
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I heard the trigger. So short cycle?

t
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  #10  
Old 08-27-2019, 07:00 AM
Jakeroub Jakeroub is online now
 
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Quote:
Originally Posted by majspud View Post
I heard the trigger. So short cycle?

t
Yeah, it sounds like everything is working properly but the bolt isn't moving far enough to the rear to reset the trigger.

Have you asked the previous owner if they had the same problem?
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