[jbmoney21]

Having problems with my Yugo SKS. It will shoot fine but once you have shot it wont eject the shell. I figured it was the gas rod not working, but you cant even get the bolt to open with your hand either. Only way to get it open and eject the shell is to pry it open with something. The bolt works and moves smoothly with no ammo in it. So if anyone has any suggestions please let me know before i have to spend money on a gunsmith

thanks

 

[mekender]

bent rod would be the first guess, otherwise something inside is loose and the pressure from the round firing is causing parts to jam together in ways they shouldn't...

 

[2068]

Sounds like it is ammo related to me. What ammo are you using? How do the cases look when you get them out?

 

[jbmoney21]

Its wolf. The cases look fine when they come out. I havent had a problem with the same ammo in my other SKS

 

[Guest]

First, check to make sure the button on the gas block is all the way over to the right. If it's centred in front of the sight you have turned off the self-loading guts of the rifle and made it into a single shot grenade launcher

Then you might want to give the chamber a good scrubbing (brush, solvent, patches, lube, the works). I heard that the steel case ammo with the lacquer/polymer on it can build up fouling over time that gets really sticky. It can't hurt hose in the fouling remover and give it a good scrub down. I use Golden Tiger which has a coating but I've not found any excessive gunk. A friend who uses Wolf has to scrub a lot more than I do.

If that isn't it, maybe you've got a bad extractor? Is it properly seated on the bolt and is the "hook" part still in good condition?

If you post some pics of the bolt face, chamber etc, I bet one of the experts here will figure it right out.

 

[eldogg]

well, first off i would make sure ALL the cosmoline was gone. especially the piston extenion and return spring area. warning, when you disconnect the lever, be carefull, the spring WILL fly if you're not expecting it.
page 7, items 3&4. http://stevespages.com/pdf/sks_45.pdf.
well that didn't work, look under sks type59 66.
http://www.stevespages.com/page7b.htm

 

[2068]

Well we can eliminate ammo. Do your bolt carrier, bolt , and receiver match in serial #?

 

[jbmoney21]

All matching numbers. I can take pictures of anything if there is something that could be causing the problem

 

[bennnn]

Don't need any pics....

I'll bet my next paycheck that it's a corroded flange on the gas valve, or the end of the tube. You can test it by taking some light colored masking tape and wrapping it once around the end of the tube where it fits over the valve.

It'll blow a black ring onto the tape or blow it completely out. There is one cheap easy fix,
you should contact CNC WARRIOR in Charlotte and get one of his $10.00 stainless Yugo gas valves...... Best ten you'll spend on a Yugo 59/66, not just money spent for "looks", it's a good tune up part even if the rifle doesn't need it.....

If that doesn't fix it,,, I'll BUY the valve off of you and you won't be out anything.

And you can hold me to that.

http://www.cncwarrior.com/comersus/store/comersus_index.asp

 

[BERT01]

i dont think is has anything to do with your gas valve or piston if you are having to pry the bolt open. sounds like there is a problem with the lock up. something may be binding when pressure is applied to the bolt face by the round being fired. check the mating surfaces on your bolt, carrier, and receiver.

 

[bennnn]

Want to put $10 on that?

 

[jbmoney21]

THe only reason i dont think it is the gas valve is cause you still cant open it by hand. But i have a good working sks i will try swapping gas valves on and see if that works before i buy one

 

[BERT01]

ill bet 10 dollars if you can explain to me why the gas valve would cause his bolt to be jammed.

 

[Lafayette Gregory]

1. Make sure the gas valve is ion the correct position.
2. Make sure all of gun is free of cosmo!!

The gas valve can cause the bolt carrier to not return. But the bolt "sticking tightly shut" requiring a pry bar- with a spent round in the chamber, is another matter.

Using lacquered shells can cause a build up in the chamber. Especially when it is mixed with dried cosmo. The shell is not ejected because the bolt remains attached to the shell, Thus not allowing the ejector to function, the spent round is glued into the chamber. The more the gun heats up the more severe the problem becomes. This is seen most commonly with Moisins with the sticky bolt issue.

Use a good bore cleaner and a wire brush to clean the chamber and throat area. It may require a vigorous cleaning. I have used acetone on a wire brush on a drill to scrub this area.

 

[bennnn]

OK, let's keep it friendly,, I don't have a bunch of technical data for you to explain why a bad gas valve causes the bolt to stick shut with steel case ammo. But it does.

It's based on a lot of personal experience, you know these rifles have been around since the sixties right? Anyway, off the top of my head I'll tell you that the gas blowing out of the valve before much of it gets down the tube will keep the op rod from pushing the bolt back, allowing the steel case to expand in the chamber,,, causing it to stick. If there is any gunk in the chamber it will make it a lot harder to open, as the lacquer will cook into something akin to shellac... But if the gas system is working good it will power through a lot of crap... Masking the effects of a cruddy chamber.

If you're not in a hurry, and want to have a little fun with this thread, I'm willing to send you a new gas valve, on my dime... Try it out, without doing anything else, if it solves your problem,,, send me the $$ for it. If not, you can keep it, and I'll eat crow.

What say you?

BTW,, unless it's just this:

1. Make sure the gas valve is ion the correct position.

Which would cause the same thing......

Everyone seems to agree that the gas valve being shut off (keeping the gas system from operating) would cause your problem,,,,,

wonder why y'all don't think a leaking valve would do the same thing????

 

[2068]

What about removing the gas piston from the gas tube, and firing the rifle. See if the carrier/bolt still stick when the gas is not acting on the mechanism. If it still sticks this would point to the bolt/carrier/chamber/cartridge.

Another thought....what is the bore diameter of your sks, and/or is the bore significantly corroded. Reason why is if the bore is greatly undersized, either from being out of tolerance for Wolf (.310) ammo, or from being corroded (effectively makes the bore diameter smaller) pressures could be much higher, resulting in a sticky bolt. This would make opening the bolt by hand much more difficult, as you lack the strong camming action of say, a bolt gun, being able to only pull the bolt straight back by hand.

 

[BERT01]

ok i think i understand what you are saying now bennnn, the bolt/case is always sticky on this rifle. but if the gas system was working right it would power through it and it would never be noticed. am i close?

 

[bennnn]

That's my opinion of why a bad valve makes the bolt stick, yup.
I've seen it happen with a chamber that I would swear was clean, even the lacquer from one or two rounds seems to be enough to let it stick, besides those steel cases expand and stay that way a lot more than brass.,

Just one guys opinion based on personal experience..

So, jbmoney21,, want me to send you one and see if it cures your ills?

 

[jbmoney21]

That's my opinion of why a bad valve makes the bolt stick, yup.
I've seen it happen with a chamber that I would swear was clean, even the lacquer from one or two rounds seems to be enough to let it stick, besides those steel cases expand and stay that way a lot more than brass.,

Just one guys opinion based on personal experience..

So, jbmoney21,, want me to send you one and see if it cures your ills?

Thanks for the offer but im just going to take the one off my other SKS that works and see if it cures it. Might give it a try today and see what i can figure out

 

[jbmoney21]

Well Bennn you are the winner. Thanks alot for the help. Took the gas valve off my other working Yugo and swapped it out. Fired like a charm. Thanks for the link as well ill be ordering a new gas valve as we speak.