Problem with CZ85

[Skip-2]

I just got an old CZ85 and it appears to have a problem that I have not come across before:
When cocked and you squeeze the trigger the hammer falls to "the double action notch". As you continue to squeeze the trigger, the hammer moves back as if completing the full cycle of double action before it falls (fires).

Why does it do this and what’s the remedy?
Any Smithy out there familiar with the CZ action, please help?

 

[railroader]

A while back I had the hammer and sear out of my cz75. I was doing some polishing to improve the trigger. I also lightened the tension on the sear spring. When I took the gun out shooting it did the same thing as your 85. It took it home and put more tension on the sear spring and the problem went away.Maybe tweaking your spring giving it more tension would help. I'm not a gunsmith, this is just my personal experiance. Good luck.

 

[Skip-2]

Hey thanks Railroader, it's a good start. I haven't taken a CZ apart yet but I'll have a look.