CZ 75 SP-01 Shadow --> DA Trigger No Longer Functioning

ccain

ccain

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Hi all.

This past Sunday I took the TDSA Advanced Pistol 1 course (which was amazing BTW) and fired almost 750 rounds in 5-6 hours. Unfortunately, I didn't get a chance to clean my pistol until this morning. I performed a standard field strip and thoroughly wiped down the slide, barrel, guide pin & spring, and the frame. I also fed a cloth through the pistol from the bottom of the mag well up through the pistol body. No cleaners were used, all I did was a wipe job.

After putting the pistol back together, everything seems to function properly except for the double action trigger. Single action works as expected, but when trying to pull the trigger in DA, nothing happens except for the trigger moving to the rear as I pull it. The hammer does not move at all, nor do any other parts appear to move.

I've never fully disassembled my Shadow and am not fully familiar with the components linked to the trigger (I'm more of a 1911 guy). Could something have happened during my course on Sunday? Or, is it possible I did something when wiping down my pistol this morning?

Personally, I never fire the pistol in DA, but I'm not comfortable with the fact that something that used to work no long functions as expected. Any input would be greatly appreciated.

Thanks in advance,

Chris.
 
Try squeezing the trigger with the slide off and see if the bar is moving or not. When you pulled the cloth thru the mag housing it might have cought a spring and pulled it off.
 
swissinn said:
Try squeezing the trigger with the slide off and see if the bar is moving or not. When you pulled the cloth thru the mag housing it might have cought a spring and pulled it off.
Click to expand...

Thanks for the reply. There are a couple of parts that move. I'm just uploading a video now that will show the moving parts.

And, I've noticed that the DA trigger catches the hammer if I move it back with my thumb every so slightly. So, it seems to be missing catching the hammer by a hair. I'll upload the video shortly. Thanks again.
 
In DA the usual sear isn't used. Instead the trigger hoop pushes on a piece that sits under the bulk of the action which pushes back the hammer. There's a little "foot" on this pusher that rides on a sloping surface in the frame and as it rides up the slope it let's go of the hammer pusher at a point a little before the sear can click into the hammer hook that is used for SA operation.

Look at the diagram in your parts manual or this online copy of the manual;

http://stevespages.com/pdf/cz_75.pdf

The trigger bar #7 has a couple of little notches at the rear. The "foot" of the disconnector #17 fits down inside the rear of the trigger bar and when pushed in DA mode the foot rides up the sloping shelf on the frame until it rises up clear of the hooks on the trigger bar and lets the hammer snap home. The trigger bar relies on upward tension from spring #34 to work the disconnector in both DA and SA mode. So be sure it didn't come loose from the trigger bar. The rag catching on this spring and dislocating it would appear to be your major issue. You can tell if the spring is still correctly in place or not by pushing down on the "humps" of the trigger bar. The bar should spring back up when released.

EDIT- Just saw your last post before mine indicating that your trigger doesn't seem to be moving far enough forward to catch the side tabs on the disconnector. You may have some gunk in the trigger assembly that is preventing it moving forward for the full stroke. Also check that your trigger return spring isn't broken. Apparently this is not an unusual thing to happen.

As you let go of the trigger you should be able to look down under the upper part of the action and see the rear of the trigger bar come forward to be pretty much even with the front side of the disconnector's "foot". As this happens you should see the humps on the trigger bar kick up a small amount as the bar slides forward and up to re-acquire engagement of the side ears of the disconnector. If this isn't happening try pulling the trigger forward to see if your trigger spring is not doing the full job for some reason.
 
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BCRider - thanks for the reply. I'll take a closer look at the areas you mentioned. And, I don't know if it'll help or not, but here is a short video of my pulling the trigger in DA.

 
Trigger bar spring broken, weak or missing? Part #34 in the CZ manual.
 
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Only the second last trigger pull produced anywhere near enough movement. The rest of the pulls are all short. Again this suggests to me that your trigger is either blocked by some grunge or other debris or that the trigger return spring is broken. The return spring is the one that shows up only in a few quick flashes on the left of the screen. And from the angle and short time in frame I can't tell if it's tensioning and releasing. But if you look at that coil while pulling the trigger you should see it tensioning and easing with the pulls. Also one of the wire "legs" will extend forward and be in plain sight. Check it with something to see if it "clicks" firmly when lifted slightly and released. You should be able to feel this preload in the spring easily.
 
Once again, thanks for the replies all. I have fully stripped the pistol and nothing appears to be broken or damaged. There's just a lot of gunk in the trigger area that I'm going to clean out with Powder Blast.

When wiping down the frame, I was cleaning the inside of the hole on the left side where the Hammer Pin sits. As I was cleaning this area, a small part fell out and I have no idea what it is or where it goes. I have tried matching it to the parts list, but I'm coming up empty. Here are some quick picks I snapped. Does anyone have a clue what this could be?

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Thanks.
 
That's what holds your right side safety in place. You'll see a cutout in the frame that it sits in. If you position it most of the way into the cutout, then put the safety in, then slide it forward and the rest of the way into the cutout you're golden. It can be a bit of a pain, and is easiest to do before the hammer is installed. Once in, keep that side of the gun down and it won't fall out. Make sure it's still there when you put the sear cage back in otherwise your safety will fall off.
 
Nope, that PDF shows P01 parts, but not the change in the safeties for some reason. I've seen one that does on the IPSC Global Village though.
 
I'm so happy. My pistol is back together, as clean as new, and both DA and SA trigger pulls are working as expected. I did, however, break the Magazine Brake and will have to replace it, but from what I've read the pistol should function with or without the brake.

Thanks again swissinn, BCRider, Dsiwy, and Slavex. Your help has been much appreciated.

Chris.
 
how did you break the brake??????? Send me your addy I have a spare one somewhere as I replace most of mine with stainless ones.
 
Slavex said:
how did you break the brake??????? Send me your addy I have a spare one somewhere as I replace most of mine with stainless ones.
Click to expand...

After I pushed in the Main Spring Plug I had noticed that the brake was tented out in the middle. When I bent it back, that's when it broke.

Thanks for the offer. PM is on it's way.

And, out of curiosity, where can I order CZ pistol parts from anyway?
 
Many of us get them straight from CZ Custom in the US. But with the current panic buying down there they suspended foreign orders for a while. And we are "foreign" to them.

Now that the crest is past in the panic situation in the US you'd have to email them and ask if they are again accepting Canadian orders for small parts.

Note that you cannot order ITAR restricted items. But for springs and smaller parts you're OK.
 
That's great!! I've checked their site and they now allow orders from Canada. I remember a few months back their site explicitly stated they would not accept any orders from outside the US. Thanks!!
 
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