P01 grit and possible solutions

[reg99]

This video is the best that I have found on decocker sear cage assembly.  https://youtu.be/4vamXokwoWg

The video is zoomed enough to clearly see the parts and springs and what he is doing, and the method he uses seems to work well.  I referenced this in my first CGW kit install and it went very well on my first attempt.  Perhaps it will help others too.

[briang2ad]

Thank you.  Good vid.  Should be a sticky.

[SEAKPhotog]

This video is the best that I have found on decocker sear cage assembly.  https://youtu.be/4vamXokwoWg

The video is zoomed enough to clearly see the parts and springs and what he is doing, and the method he uses seems to work well.  I referenced this in my first CGW kit install and it went very well on my first attempt.  Perhaps it will help others too.

That's my go to video as well.

[briang2ad]

With no further work, my thinking is changing on this.  When I had detail stripped and polished the action, the disco had some steel 'overmolded' on the top.  I polished and smoothed this area pretty well, but some extra steel is still there.  This runs UNDER the sear cage throughout the DA pull.  It is much smoother now, but bumpy. 

Therefore, when the disco/trigger set comes in from CGW, I intend only to polish the bottom of the sear again (moderately), and let it be and reassemble.  I think the bumpiness WILL go away and the grit always was the overmolded part. 

[Claymore504]

Makes sense for sure. Let us know an update when you get the parts installed.

[briang2ad]

When I had it part I did decided not to take a part the sear  cage.  I did end up shaping the angle on the underside of the sear cage a bit. I did some real good polishing but again did not want to take apart the sear cage. Put all items back together with the reduced reach kit and I’ll have to say that the bumpiness is pretty much gone. However, I do believe the stacking is much more than I think should be in a kit I spent so much money on. Therefore, I would have to think that the seer cage may be the culprit after all.  The DA is “pretty good” and of course the SA very good. But overall disappointed a bit.

[SEAKPhotog]

So I stripped down my gritty in DA PCR today - the one that's been previously polished by both CGW and me. Once stripped down I installed the parts one by one to test the action and check for the dreaded grit. Trigger and trigger bar first in. Smooth as silk. Hammer and disco without the main spring next, just using manually applied pressure to check the action. Again, nice and smooth. Installed the main spring and things got interesting. Much of the grit was back.  Now, the hammer strut was already polished smooth so that wasn't the issue. After fiddling around with the spring/strut combo I 
found that if I played around with the main spring plug and got the spring/strut/plug aligned perfectly straight most of the grit would disappear. It seemed to me that perhaps the spring was rubbing against the edges of the admittedly rough plug so I proceeded to file and polish the plug. That done, I also checked the sear cage and noticed pretty pronounced rub marks where the dicso rubs up against the underside of the sear cage. I removed the hammer/dicso and checked the disco for rough surfaces and noticed it had some rough edges.  I polished the disco just enough to get rid of them and also polished the underside of the sear cage again.  I put the gun back together and tested it. I'd say at least 60% of the grit is gone. I'm fairly pleased. It's still not as nice as my other CZs but the DA is definitely better/less objectionable and the SA remains wonderful.

[Claymore504]

Also try ploshing the ends of the main spring. Makes a difference for sure!

[SEAKPhotog]

Also try ploshing the ends of the main spring. Makes a difference for sure!

I actually thought about that about that but got busy. I'm gonna try it - can't hurt. 🤷🏻 Thanks for the reminder.

[SEAKPhotog]

Also try ploshing the ends of the main spring. Makes a difference for sure!

Spent a little free time today polishing the main spring and filing/polishing down the sharp edges of the ends of the springs. I also used a 1200 grit polishing pad on a dremel bit to really polish the interior and edges of the plug. Put some moly grease on the strut and plug interior, put it back together and yep, it was even a bit better. Pretty much comparable with my polished P01 steel frame. Working on the spring and plug was a worthwhile endeavor for sure.

[briang2ad]

With most of my grit problems gone, I have the nagging problem of STACKING.  With the input from CGW, I called CZ USA.  They are semi-reluctantly sending a sear cage.  I will polish it up and install and see what I get. 

[briang2ad]

CZ USA sent the cage. Polished up the new cage, took all the parts out, put them into the new cage.  Broke the lifter spring on the way in.   

The video linked here is pretty amazing.  I would differ in this.  DO NOT put the dainty lifter spring till you are done and have the sear cage back in the gun.  Back the sear pin out a tad - put the lifter spring in, then reinsert the sear pin.

[SEAKPhotog]

CZ USA sent the cage. Polished up the new cage, took all the parts out, put them into the new cage.  Broke the lifter spring on the way in.   

The video linked here is pretty amazing.  I would differ in this.  DO NOT put the dainty lifter spring till you are done and have the sear cage back in the gun.  Back the sear pin out a tad - put the lifter spring in, then reinsert the sear pin.

Those lifter springs are definitely a PITA. I've broken 1 and lost one during my CZ smithing adventures. Good to have a few spares on hand. I've always pretty much used the method in the video to reassemble the cage. Maybe I'll try your suggestion next time. Hope the new cage solves your issues.

[briang2ad]

Got it all back together today with the new cedar cage installed. It is much better although there is some stacking halfway through the pool but it’s smooth and pretty nice because of the light Cajun Springs. Nowhere near as smooth as a SIG for example but it is a very nice trigger