Sear/sear spring problem and fix
Posted: August 6th, 2007, 1:10 pm
I'm at it again. I found another problem with my p64 and subsequently fixed it. The problem presented itself when dry firing (with snap caps of course) in double action. I pulled the trigger, hammer moved back and released. I then released my finger from the trigger and reapplied it to dry fire again. The trigger would not operate the hammer, it moved freely. After taking the grips off I noticed that the hammer had moved past where the sear could engage it. In other words the hammer came to rest too far forward for the sear to engage it. I then wiggled the trigger a bit and it made an audible "click". The sear had engaged the hammer and double action worked fine a few more times. Then, the problem reared it's ugly head again. My concerns were that if i really needed to fire this gun in self defense, could i rely on it with this problem? I came to a quick conclusion of NO! and tried to figure out why this was happening.
I believe the sear spring is the culprit. Part number 13 in this diagram: http://i61.photobucket.com/albums/h79/d ... n/0P64.jpg.
I could visibly see it malfunction with the slide off by looking down onto the mechanism. The sear spring wasnt putting enough pressure on the top of the sear for the bottom of the sear to catch the hammer quickly enough every time. So, I searched around for a similar sized spring that was a little stronger than my original.
I am a collector and builder of AK type rifles and have lots of parts. An AK disconnector spring was about the right diameter and a little beefier. It was about twice as long so I cut it to the same size as my original sear spring with the "file and snap" method and installed it. The problem has not presented itself again and there is no appreciable difference in double action trigger pull.
It worked for me. Just passing along some more information.
I believe the sear spring is the culprit. Part number 13 in this diagram: http://i61.photobucket.com/albums/h79/d ... n/0P64.jpg.
I could visibly see it malfunction with the slide off by looking down onto the mechanism. The sear spring wasnt putting enough pressure on the top of the sear for the bottom of the sear to catch the hammer quickly enough every time. So, I searched around for a similar sized spring that was a little stronger than my original.
I am a collector and builder of AK type rifles and have lots of parts. An AK disconnector spring was about the right diameter and a little beefier. It was about twice as long so I cut it to the same size as my original sear spring with the "file and snap" method and installed it. The problem has not presented itself again and there is no appreciable difference in double action trigger pull.
It worked for me. Just passing along some more information.