Loctite on SVT40

I don't think it would hurt,as long as it is blue threadlocker.
But it will be a pain when it comes time to clean,I like to take the gas cylinder and piston out after shooting corrosive ammo and soak them in hot water or clean them with the little steamcleaner I bought from XS Cargo before they went out of business.
 
I literally put 10 rounds through it and have to tighten the cylinder.
I know when its loosened cuz it starts to FTE and FTF.
Is there Locnotsotite? :-D
I really love this rifle so may have to buy another one just so I don't have to deal with this problem.
 
If it was me I'd wrap a bit of Teflon plumbers tape around the threads of the gas tube. You'll most likely have to re wrap it on the regular but it's cheap and won't lock up on you like a thread locker will. Just my .2 cents though.
 
Think I have it solved.
If I turn the setting down it loosens the gas cylinder.
SO if I want to turn it down 1 notch I actually have to turn it up 4. That way it is actually tightening the cylinder.
 
You have to clean this area up properly. And the correct way of adjusting gas setting is to loosen piston, then turn the adjustment nut into new position then tighten piston back. It should be done with SVT key, or correct wrenches, not with pliers. And do not do it with piston tighten all way in.
 
I don't change the gas setting on mine,when I got it it was set at 1.3,and looking at the little gas valve you could tell it had always been fired with that setting,very tiny bit of corrosion around the 1.3 hole.
Now I even turned it down one more setting,down to 1.2 and the rifle still functions flawless and does not trow the cases out that far anymore either,no need to beat up the action with too much gas !
 
I have snugged one up by deforming the threads a wee bit on the piston (just like tightening a striker in a cocking piece on a Lee Enfield). The gun was meant to be adjusted as often as necessary to accomodate changing conditions (temperature, fouling of gun, etc). In the Chumak book the author quotes reports suggesting reluctance to adjust was a serious operational issue leading to needless poor functioning. I also have a crazy theory that best accuracy requires a fairly stout gas setting. I suspect that if the mechanism is just barely cycling the downward deflection of the barrel by the operating system may not be consistant from shot to shot. I have noticed groups tighten up after increasing the gas setting (after seeing someone else suggest this on the forum). Anyone else find this to be so?

milsurpo
 
When the Germans designed the G-43/K-43 they copied the gas system directly from the SVT-40 but omitted one feature and that is the gas system on their rifles was not adjustible.
They believed in giving maximum gas,but the result of that is that a lot of these rifles now have cracket actions because the bolts have been hitting the rear of the receiver way to hard .
.Apletor nowadays makes a "shooter kit " for them which consists of a gas piston with a set of three replacible orifices that have small holes decreasing in size.
They recommend using the one with the smallest hole that still allows the rifle to cycle reliably so as not to beat it up.
For the above reason I like to use the lowest gas setting on my SVT 40 and lets face it,even today's surplus ammo is pretty consistent in quality,so once you find out what makes the action cycle reliably leave it there.
 
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