CZ 75 P07 won't fire in DA?


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coyotewillie
January 15, 2013, 06:30 PM
A friend has a CZ 75 P07 9mm that he'll sell me. I'd never fired it before, so he gave it and a Walther .40 to me to take out and try. He'll sell either one, I'd rather have a .40 but I like the CZ a little better than the Walther. Anyway, I can't get it to fire in DA after decocking it. He hasn't hardly fired it himself, and doesn't remember even trying it this way, so it was news to him. So, any way this could be just simply a cleaning problem? Or does it sound like a mechanical problem? Granted, I've got to look up the disassembly procedures yet but just wondering before I get to that point. Thank you. Greg

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kokapelli
January 15, 2013, 06:34 PM
Do you have it in half cock after de-cocking it?

The hammer needs to be back in the half cock position formitnfire in double action mode.

Walt Sherrill
January 15, 2013, 07:33 PM
The hammer should be setting on the half-cock notch when decocked using the decocker lever, but I think it should fire from the (fully) hammer down position, too. (I say that not having owned one of the new Omega Trigger guns...but since the gun's convertible by the owner from decocker to safety mode and back, it ought to fire from fully hammer down. (It just never goes fully hammer down when using it as a decocker model except when it's being fired.)

I'd suggest visiting the CZ Forum and asking this question, there -- as you'll find folks there who already know that model pretty well.

http://www.czfirearms.us

1 old 0311-1
January 15, 2013, 08:11 PM
What kind of ammo are you using? Sounds like you got some hard primers, or even a OAL issue. CZ's are tested with S&B ammo and also are OK to use steel case ammo. Try that before you try the CZ site. Being new, and a pretty basic question, the Administrator there will run over the coals. He has a habit of showing the world how demeaning he can be with new people. Good luck.

p.s. you may also call CZ. If you need their number send me a P.M. and I will hook you up.

ClickClickD'oh
January 15, 2013, 08:20 PM
More information needed. What is it doing, or rather not doing. When you pull the trigger, does the hammer cycle all the way to the rear then drop or does pulling the trigger not move the hammer?

Have you tried using one of the CZ dummy round in the chamber to see if the firing pin is striking the primer? If you don't have one of the dummy rounds, just use a spent case with a piece of paper behind the primer. You should notice an impact on the paper.

If your hammer isn't cycling, bad things.

If your hammer is cycling but you aren't getting primer strikes take a look at the firing pin block to make sure it isn't frozen in place. If the firing pin block is free, push it up and push the firing pin forward to make sure it a) protrudes from the bolt face at full extension and b) isn't damaged.

coyotewillie
January 15, 2013, 08:42 PM
Admittedly, I really know nothing about the CZ, technically that is. But DA should fire after decocking just by pulling the trigger, right? I always thought that was the purpose (function) of a decocker. My buddy called CZ this afternoon to ask....no one home! All at the Shot Show. I was surprised at that. Anyway, the gun will fire normally after you rack the slide, or if you manually cock the hammer. Even when you cock the hammer after you attempt to fire in DA. Just not after decocking.

kokapelli
January 15, 2013, 09:14 PM
Did you try setting the hammer at half cock like I suggested?

After you de cock it just pull the hammer back slightly and it will catch at the half cock which is a safe position and then the pistol should fire in double action.

When the hammer is at half cock the hammer block is activated.

Just try it!

hAkron
January 15, 2013, 09:26 PM
The decocker can be swapped for a safety and vise verse, maybe somebody didn't put it back together correctly.

Walt Sherrill
January 15, 2013, 09:38 PM
Being new, and a pretty basic question, the Administrator there will run over the coals. He has a habit of showing the world how demeaning he can be with new people. Good luck.

I haven't taken part in discussions on the CZ Forum in quite some time, but was a long-time staff member there in years past. The kind of behavior you describe would never have been tolerated in the past.

Are we talking about the SAME CZ forum? (Give us a link to the one you're disgusted with.) There's more than one.

How about the administrator's name?

coyotewillie
January 15, 2013, 09:39 PM
I've tried it. When you decock, the hammer goes to half cock position.

kokapelli
January 15, 2013, 09:40 PM
Than something must be wrong with it!

hAkron
January 15, 2013, 10:07 PM
When you decock it, it should go to the half cock notch. That is normal. If the decocker was not correctly installed, it may be getting in the way of a double action trigger pull, if the decocker doesn't bring the hammer completely down on the sear notch, then the sear isn't holding th hammer and pulling the trigger doesn't cause the sear to move the hammer.

Another thing to check, and I forget how it's arranged on an omega trigger, is the trigger bow spring. If th trigger bow spring doesn't have the correct tension on the trigger bow, then you will have firing problems.

chris in va
January 15, 2013, 11:07 PM
Try this.

Get a traditional pencil with an eraser. Making sure the gun is unloaded and mag out, drop the eraser end into the barrel, pointing up.

Pull the trigger from full hammer down. Do the same from half cock and full hammer back.

All three settings should send the pencil about three feet into the air. If not, something is amiss.

BCRider
January 16, 2013, 03:11 AM
I've tried it. When you decock, the hammer goes to half cock position.

So at that point if you pull the trigger does the hammer go back? If so does it fail to release and follow the trigger motion back down as you release it?

hAkron
January 16, 2013, 03:32 PM
Here is a video from CZ that shows how to remove the decocker. It might be worth pulling it out to see if it is in there correctly.

http://www.youtube.com/watch?feature=player_embedded&v=XtUB_6kd-Jc

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