CZ-52 problems

C

Coronach

New member
I tried to put my 'new' CZ-52 through its paces today, but I was thwarted by an odd malfunction. Assume the gun is loaded, one up the spout, hammer cocked, safety off:

Pull trigger- the gun fires, the slide cycles, loading the next round. The hammer is cocked back, as it should be. Pull the trigger for the second time and...nothing happens. The trigger moves a short distance, it does not seem to engage or release anything, the hammer just sits there. So I curse loudly (so I can hear myself with my hearing protection on), decock, recock, try again. Nothing. I rack the slide, kicking out the live round and chambering the next. Pull the trigger. BOOM. Slide cycles, next round loaded, hammer back. Pull trigger, nothing. Decock, recock, repull, nothing, rack slide, pull trigger, BOOM, repeat pattern.

Hammer? Sear?

Thanks,
Mike
 
I'll second Mike's diagnosis. Since the hammer recocks upon firing, but the trigger doesn't engage, it sounds like a disconnector problem. Its disconnecting, which is good if you are not a fan of sudden and tremendously fast full auto, but not reconnecting. My father's CZ52 has been absolutely flawless in functioning (2 rounds of dead milsurp ammo aside), so I've had no reason to tinker with the sear/hammer, but I'll give it a shot.

If you remove the slide, the tip of the disconnecter is exposed. Check if it shows any sign of damage or is hesitant in springing up/down. Depress the disconnector and pull the trigger. Release it and try the same thing. If it sticks down due to dirt/burrs/chips/broken or weak spring, the gun would do exactly as you have described. Manually cycling it is probably forcing the disconnector back up, allowing the trigger to engage the sear
and the gun to fire.
I don't have the gun here to check, but I believe that there is a slight notch on the slide's rail that the disconnecter engages when its in full battery, allowing it to rise up enough for the trigger to engage. If that detent is full of dirt/grease, it might cause a similar problem.
 
OK, I took the little beastie apart and this is what I discovered:

The problem does indeed seem to be with the trigger transfer and disconnector bar. It has a dohicky (likely the 'disconnector' part) that sticks up on the right side of the frame and is designed to ride along the bottom of the slide during cycling, and then pop up into a semi-circular cut on the underside of the slide when the slide is in battery. The dohicky is bent over at the top, and this appears to be by design. With the slide removed the trigger/hammer system functions flawlessly. The trouble is that with the slide assembly on the gun the dohicky often refuses to pop up as it should. Removal of the right grip panel allows a clear view of the malfunction:

The gun is empty, hammer back, safety off. The gun is dry-fired (CAREFULLY easing the hammer down so as to protect the pin) and cycled manually. The dohicky is clearly still in the down position, with the bent-over-part still riding on the slide base and not popping up into the cut. The trigger is pulled and the fact that it is not engaging the sear can be seen plainly. Pressing gently on the transfer bar (inwards) causes the dohicky to pop up into the cut in the slide base and the gun functions normally. So, thats the problem.

Solution? Is there a missing/malfunctioning spring or tensioning device that is supposed to hold the transfer bar further inwards, or does a little bit of the disconnector dohicky just need to be ground off, or is there something else I'm missing?

Thanks,
Mike
 
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