Posted: 5/13/2012 8:31:29 AM EDT
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Just got a new SP01 shadow from CZC about a week ago. Took it out last night and put about a hundred rounds through it. I had A LOT of trigger reset issues. I would say about 95% of the time the trigger would not reset after shooting. I would then remove the mag, rack the slide to remove the round that was chambered, re-insert the mag, rack the slide and then it would fire. Then the same thing would happen: round fired, new round chambered, hammer cocked, but the trigger would not reset.
I can sit here and dry fire all day long and the trigger resets with no problems. Any recommendations or thoughts on what might be happening? FYI: its an SP01 Shadow that CZC worked over with a SAO trigger, competition hammer, lighter firing pin spring and extended firing pin. |
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does it have an over-travel adjustment screw in the trigger? Problem if I remember correctly is that you have to remove the trigger from the frame to adjust the over travel. Not hard but a little tricky to re assemble if you never did it before. A slave pin will be of great assistance. I cut a drill bit to length. I've used bits of toothpicks in the past but they barely hold up. If it works dry firing you might want to go half turns. Good luck. P.s. Before you tear it down see if I'm wrong and hope you can adjust it without disassembly. |
| If you have the two screw trigger you need to back off the front pre travel screw. Take the slide off the frame. The screw is right by the trigger return spring. You don't have to take the trigger out to adjust it either. Try backing it out about a quarter turn. On my cz with that style of trigger I have about an 1/8" of pretravel and it works fine. The trigger screw should have been installed with some blue locktite so the screw should be a little stiff to turn. If it isn't you might want to put some on it. To do do this screw the screw way in so you can see some threads showing on the front pointy end. Put a small amount of locktite on the threads with a tooth pick. Now screw the allen screw back into the trigger and adjust for the amount of take up you want. Careful not to get locktite everywhere and gum up the works. Also make sure the overtravel screw is backed off enough so when the gun fires the trigger travels just a bit more. You want to make sure the hammer hooks clear the sear completely when it fires. |
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If you have the two screw trigger you need to back off the front pre travel screw. Take the slide off the frame. The screw is right by the trigger return spring. You don't have to take the trigger out to adjust it either. Try backing it out about a quarter turn. On my cz with that style of trigger I have about an 1/8" of pretravel and it works fine. The trigger screw should have been installed with some blue locktite so the screw should be a little stiff to turn. If it isn't you might want to put some on it. To do do this screw the screw way in so you can see some threads showing on the front pointy end. Put a small amount of locktite on the threads with a tooth pick. Now screw the allen screw back into the trigger and adjust for the amount of take up you want. Careful not to get locktite everywhere and gum up the works. Also make sure the overtravel screw is backed off enough so when the gun fires the trigger travels just a bit more. You want to make sure the hammer hooks clear the sear completely when it fires. We might be talking about the same thing but he needs to adjust the over travel set screw. It goes bang but will not reset. Trigger needs to go forward a hair more to allow it to reset the sear. That adjustment is the over travel and you are correct that it is right below the trigger spring and does not need disassembly. My memory gets worse every year. 
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Quoted:
If you have the two screw trigger you need to back off the front pre travel screw. Take the slide off the frame. The screw is right by the trigger return spring. You don't have to take the trigger out to adjust it either. Try backing it out about a quarter turn. On my cz with that style of trigger I have about an 1/8" of pretravel and it works fine. The trigger screw should have been installed with some blue locktite so the screw should be a little stiff to turn. If it isn't you might want to put some on it. To do do this screw the screw way in so you can see some threads showing on the front pointy end. Put a small amount of locktite on the threads with a tooth pick. Now screw the allen screw back into the trigger and adjust for the amount of take up you want. Careful not to get locktite everywhere and gum up the works. Also make sure the overtravel screw is backed off enough so when the gun fires the trigger travels just a bit more. You want to make sure the hammer hooks clear the sear completely when it fires. We might be talking about the same thing but he needs to adjust the over travel set screw. It goes bang but will not reset. Trigger needs to go forward a hair more to allow it to reset the sear. That adjustment is the over travel and you are correct that it is right below the trigger spring and does not need disassembly. My memory gets worse every year. I spoke with Stuart from CZC on the CZ forums and he suggested adjusting the pre-travel screw to allow the trigger to return a little further forward to engage the sear. He stated that: I would check the pretravel adjustment make sure there is enough room for the trigger to reset?
also check the trigger bar spring ( both sides ) are in the correct position. It is set that close..the shock of the slide racking on an empty chamber can be enough to set the sear.
When shooting livefire, there is enough cushioning from stripping a round out of the mag and chambering it that it can hinder the reset. I did back off the pre-travel a little and it does reset a little more positively in dry-fire, while adding just a little bit more pre-travel/takeup in the trigger. I'm taking it back out tonight to see if it fixes it, but will take tools with me this time so that I can make the adjustments on the range. I'll report back with what I find out. |
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Just to update: I backed off the pre-travel screw about a quarter turn then went and put about 200 rounds through it last night. I only had one instance where it failed to reset, the rest were flawless.
I'll probably back it off maybe another 1/8th of a turn or so to ensure maximum reliability. Thanks for all the input guys. Also, what is the best way to blue locktite it in place? I have it where I need it right now, but can't figure out a good way to get some locktite on the threads without backing it all the way out and then losing the spot where it's working. Any suggestions??? Should I just count the exact amount of turns it takes to back it off until I see threads, put on a little locktite, then thread it back in the exact same amount of turns I backed it off? |
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Also, what is the best way to blue locktite it in place? This is what I did with mine. I counted the turns out, pulled the screw all the way out of the gun and cleaned it. Blue locktited it and reinstalled. Test fired it (dry) to get to the fail point, backed out 1/4 a turn from that and let it set. Test fired it 200 rounds later no issues. |
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