SVT Gas Sytem - Confused on hole location

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VooDooMan

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Hey every one.

Ok just got my beautiful rifle from trade ex in Quebec.
Great looking gun, with the arsenal repair here and there. Over all looking good.

I cleaned her up and down today and as I was assembling I stumbled upon a small issue.

The gas adjustment nut or what ever you want to call it ( with stamped numbers from 1.3-1.7 ) seems to not sit correctly when I replaced it after cleaning.

What I mean is that there are slits on the nut and a single slit on the firearm and when I line them up the holes inside the housing dont line up, The housing hole is always between 2 holes on the nut it self.

Now I assume thats wrong correct? Since the bore and nut and housing all have holes in them that should all run vertical in a straight line down, Where I should be able to place a small #60 drill bit and pass through all 3 correcrt?

Just want to check before I head to the range, and this puppy turns into single fire mode LOL

Also. What are these numbers, I assume each one releases more and more gas then the other one?

So how would that work out........say a heavy hitting round like hungarian yellow tip would need the biggest hole, and a light hitting silver tip would need the smaller hole?

Or how exactly?

Thanks guys - Couldn't find any info searching!

Take care
 
So I guess the hole doesnt line up, it doesn't need to be all in line, actually the only hole I am supposed to see is the frame hole and nut the nut or bore hole........it seems

I had better luck last night with this damn hole business. LOL
 
The stock is Artic Birch. It will be hard to duplicate the wartime shellac finish so I would try to leave it as is if possible. As for the gas regulator you want to set it at the lowest setting that still allows the action to cycle properly. The larger holes are used when the rifle gets dirty, the weather gets colder, the ammo is weak etc. Start at 1.5 and see if it will function and then try a lower setting. Keep turning it down until it no longer cycles then go up one.

You don't want the three holes to line up and they shouldn't be able to. If the did then the gas will just be vented out without cycling the action. The gas is supposed to travel down the barrel and some bleeds off into the regulator. It does a 90 degree turn in the regulator nut and travels back to the gas piston and drives back the operating rod. The regulator nut is made so that the largest hole is opposite the corresponding largest number. That way when the largest number is lined up with the hash mark the largest hole will be above the hole in the barrel. The hole in the top of the regulator assembly is for lubrication - this area can get very dirty and if the regulator nut is not adjusted every once in a while it can seize up. Corrosive ammo doesn't help especially if the maintenance is neglected - a common problem with the wartime recruits.

Hope this clarifies things for you!
 
slyder yea I know......its a shame, does value drop considerably when some thing like that is done?

I would like to stain with a nice semi dark red or simiilar........
I stripped the finish slightly accidentally wile I was cleaning it with windex LOL
Oops.......Although I don't plan to resell it so value dropping a big issue!

Thanks snow dog for the explanation, I will start at 1.5 and work down until it doesn't cycle then 1 up.

THANKS
 
Sanded/stained rifles drop from 50 to 75% of their value depending how much damage is done. Very easy to turn a $500.00 gun into a $50.00 one!
 
VooDooMan said:
slyder yea I know......its a shame, does value drop considerably when some thing like that is done?

I would like to stain with a nice semi dark red or simiilar........
I stripped the finish slightly accidentally wile I was cleaning it with windex LOL
Oops.......Although I don't plan to resell it so value dropping a big issue!

Thanks snow dog for the explanation, I will start at 1.5 and work down until it doesn't cycle then 1 up.

THANKS
Click to expand...

In refinishing it you're altering it's history...most milsurp people consider that rubbing in a new coat of boiled linseed oil is acceptable and expected, but sanding :)eek:) and staining is verboten!

You'll be called Bubba.
 
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