The Original CZ Forum

GENERAL => CZ Gunsmithing => Topic started by: CZJ on October 29, 2018, 10:47:01 PM

Title: 13# Main Spring Binding In Steel Compact
Post by: CZJ on October 29, 2018, 10:47:01 PM
 I have the blue 13-pound mainspring kit installed in my steel compact. It seems like it's binding up by the noise it makes when it's installed and you squeeze the trigger, like a creaking noise. Broke it all down tonight to clean and inspect and found that the spring seems like it's binding because the paint is rubbed off on one side and the spring appears bent compared to the factory new one I have. I didn't notice before when I installed it but I noticed that this blue spring is a coil or two longer then the factory spring, what gives? Compact and full-size mainspring different? This was ordered from CGW. For now I just put the stock Springs back in it, any help would be appreciated, thanks.

http://i.imgur.com/pYATLtc.jpg
Title: Re: 13# Main Spring Binding In Steel Compact
Post by: Scarlett Pistol on October 29, 2018, 11:00:27 PM
In haven?t had that happen before. Curious to see what others say to trouble shoot. If no one chimes in I?d call CGW. They are super nice and helpful.
Title: Re: 13# Main Spring Binding In Steel Compact
Post by: Stuart on October 30, 2018, 11:47:00 AM
could clip a coil or two and be set.

full size and compact use same mainspring. plugs are different size to account for the difference in frame size.
Title: Re: 13# Main Spring Binding In Steel Compact
Post by: rhart on October 30, 2018, 12:35:54 PM
If the hammer strut is rough it will cause this. Try smoothing the strut - polishing/smoothing the nicks/ridges. Smooth out the tip of the strut as well.
Title: Re: 13# Main Spring Binding In Steel Compact
Post by: The Guardian on October 30, 2018, 06:44:04 PM
Not sure what grips or grip screws your using.......thin grips with longer grip screws?  The longer screws can hinder/rub on the mainspring during trigger pull....if that's the case, shorter grip screws may be in order.......just brain-storming here  ::)
Title: Re: 13# Main Spring Binding In Steel Compact
Post by: M1A4ME on October 30, 2018, 07:22:25 PM
The spring will rub a corner (strut has four, so there's a lot of opportunity there) and hang (just a bit) before popping loose to hang again and pop loose again.

My old Pre CZ85's strut actually has a washboard looking corners on it.  The spring rubbed so many years, so much, that it wore ridges in the corners.

You don't notice it when firing the pistol but if you manually cock it you'll hear it.

You can, as someone suggested, polish those 4 corners to smooth up the spring coils movement up/down the strut.

Make sure your pistol is empty, remove on grip panel, manually cock the hammer and listen to it.  Watch it, too.  You might see the spring sort of jerk/bounce as the spring is slowly compressed.  That'll tell you to polish those four corners on the struck.

Or, as suggested by another poster, it might allow you to see if the spring is rubbing the end of the grip screw on the opposite grip.  If not, reinstall the grip panel you removed and take the other one off and cock it to see if the other side is contacting the end of that grip's screw.

Good luck with it.