CZ858 Sear Problem

slicknick

slicknick

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Lately, when I am shooting my 858 the rifle will cycle and chamber a round but will not be cocked. As well, when I eject the shell in the chamber it has a light mark on the primer. Seems to me that the striker is not catching the sear. Any suggestion on how to remedy this problem, I'm worried it might slamfire and 'run away'

Thanks in Advance

Nick
 
If there is slack in the sear you should be able to correct this by taking out the sear spring and bending it up. If the cam on the striker is worn it can be welded and filed into shape again, same goes for the sear. Should be easy enough to sort out.

PS it could also be a problem with the lever that activates the sear when hit by the cam on returning bolt carrier, take a look at that while you are at it.
 
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This is now a common problem. I was one of the first to experince it and solve it (far as I know....my luck). It is now referred to as the "CZ-858 Gremlin" The bad news is the only cure so far is get a replacement rifle or a total revamp of the internals. Meaning that you have to by a parts kit (something I think every CZ/VZ owner should have anyway) and replace the trigger and sear assemblies. That will solve it. Many people have had this problem and replacing the trigger and sear asseblies seems to work. I replaced ALL internal parts. Evetything but the bolt and mine has worked fine every since.

In the mean time, you may find that if you completly pull the trigger stright through (meaning ALL the way to the rear every shot) the striker won't fail to ####.

Feel free to PM with any questions.
 
Ljungman said:
This is now a common problem. I was one of the first to experince it and solve it (far as I know....my luck). It is now referred to as the "CZ-858 Gremlin" The bad news is the only cure so far is get a replacement rifle or a total revamp of the internals. Meaning that you have to by a parts kit (something I think every CZ/VZ owner should have anyway) and replace the trigger and sear assemblies. That will solve it.
Click to expand...

There is probably very little wrong with the sear assembly that could not be rectifled without replacing everything with a complete set of parts, this may fix the problem, but so would just buying a new rifle. I would bet I could easily fix it.
 
Well you go ahead and try. It would be a great help to a great many people. A few (including myself) have fiddled with it alot to try and pin down the problem but to no avail. So as of right now, revap is the only "Known" fix.
 
Bending the sear spring does not solve the problem I tried.
But heres the good news its an easy fix. replace the sear, sear spring, trigger, striker and bolt carrier.
if you do this it will work prefect! You may ask why replace all of that,
well if you replace the wrong part you will have to go on a wild goose chase to find the bad one so just replace it all. REMEMBER DONT REPLACE THE BOLT OR THE LOCKING PEICE!!!!!!! you could change your headspacing and kaboom no more face lol

Mine works better then any SKS I ever owned not one stopage yet:)
Its a great gun its just the new CZ company is using bad parts or moding them wrong

PS dont shoot it untill you fix it
it will only give you a bad impression of the gun and piss you off
 
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Good call Dsiwy, I menshioned I didn't replace the bolt but forgot to say why. I too was conserned over headspace so while I replaced EVERYTHING elese, I stuck with the original bolt. I didn't bother to chase down the problem any more as that fixed it and well, now that it works the reason it didn't before is not as important to me.

I wouldn't mind seeing someone figure it out though. If for nothing elese than to just know. For curiosity sake.
 
Dsiwy said:
Bending the sear spring does not solve the problem I tried.
Click to expand...


Did you try it on slicknicks rifle ? I'm not saying that there is definately a problem with the sear spring, but there could well be.




Dsiwy said:
But heres the good news its an easy fix. replace the sear, sear spring, trigger, striker and bolt carrier.
if you do this it will work prefect! You may ask why replace all of that,
well if you replace the wrong part you will have to go on a wild goose chase to find the bad one so just replace it all.
Click to expand...

Then you will have a parts kit in which you have no idea what's good or junk.

It seems that nobody here has actually fixed the problem, all that has been done is to replace everything. It's like replacing a good engine just because of a faulty spark plug. You must have loads of money to throw away.
 
kako911 said:
Wow,

A high quality rifle that needs a complete parts kit and repairs prior to shooting...


A swiss clock never stops ticking !

Pun intended

:D

Sorry I had to do it !
Click to expand...


Yes the Swiss stuff has pleanty of ticks, and all manner of creepy things more than likely, but there again that's is what you pay for, I think it's known as masochism :)
 
Thanks for the advice all. I've been tinkering and I've noticed that the thingus the bolt carrier hits to reset the sear is rather hard to depress with my finger. Anyways, it looks like it'll be a parts kit. However, before I spend $100 and a couple weeks waiting on a parts kit I'd like to know how difficult a procecdure it is to replace all these parts. I'm sort of a mechanical retard, you see


Thanks

Nick
 
### Gun Lover said:
Yes the Swiss stuff has pleanty of ticks, and all manner of creepy things more than likely, but there again that's is what you pay for, I think it's known as masochism :)
Click to expand...

Bouahhhaha, Cough-cough...... Bouhahahhahah

No seriously, you made me laugh !

KPA
 
I'd recomend getting a replacement rifle befor anything. The only reason I suggest the parts kit is: It DOES work. And if you got the money to "Waste" on something that will fix your problem then go for it. I'd have returned my rifle, but it was close to Caribou season and I'd be waiting FOREVER for a new Rifle to come or have that one repaired.

Besides, my parts kit came with a wood furniture set (a surprise and at no extra cost to me) so I'm happy.

slicknick: The parts are easy as pie to replace. The only problem you might have is the sear spring. The sear spring in the semi CZ's have only one spring finger (cause there is only one sear) but the one in the parts might have two as it's for the orignal CZ. Just hacksaw/dremmel off the spare or it won't fit. You'll see what I'm talking about when you look at it anyway.

Btw, my kit came in a week and a half...and I'm in NFLD!
 
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In the mean time, you may find that if you completly pull the trigger straight through (meaning ALL the way to the rear every shot) the striker won't fail to ####.

Most of the time, it happens at the bench when people tend to stage the trigger and do not follow through the movement.
Combine that with a secondary sear with a bit of play or wear and you have a hammer that follows the breech on the return stroke.
PP.
 
I just recently got one and have had no problems...I wonder out of everyone who is having problems were these rifles part of the first shipment?
 
Mine was from P and D and was probaly a first shipment.
It pissed me off until I fixed the problem now its my favorite gun so if any ones thinking of buying a Vz dont let these posts scare you off.
 
I recently purchased the restricted version from Milarm. I haven't had a chance to fire it yet but it seems to be functioning fine.

Does anyone know if this problem is limited to the longer barrel rifles?

Has anyone had problems with the restricted version from Milarm/Marstar?

Also, do the restricted versions have new barrels and new/ unused parts like the 858 or are they surplus.

mine is marked CZH 2003 Sport.

Any information would be greatly appreciated.
 
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