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Curio & Relic/Black Powder Curio & Relics and Black Powder Firearms, Old School shooting fun!

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  #1  
Old 07-19-2013, 6:47 PM
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Default New SVT-40 - which springs to replace? Pics inside!

Acquired a new-to-me Finnish SVT-40. In decent shape, definitely has a "been-there, done that" look to it. Stock isn't cracked around the grip which is common, so that's nice. Bore is in great condition too! However, there is this one issue where the trigger doesn't seem to reset unless if I actively push the trigger forward, so I'm guessing this can be fixed with a replacement spring somewhere. Which part would it be on Numrich's diagram?

Also, the bolt seems to be somewhat weak with the recoil spring, so should I also replace the recoil spring, just so it's in servicable condition? I suppose this is recommended as the springs could potentially buffer the bolt and carrier from battering the rear receiver area.

So I guess in general, which springs are highly recommended to replace in an old SVT-40 so that it's in a safe and shootable condition?

Here's some pics, since I know you guys want that:










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  #2  
Old 07-19-2013, 7:22 PM
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really gorgeous stock! wow. you've got the sniper rails but no cut on the top..mines the same way in this regard.

good luck on the fix, she's a beaut.
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  #3  
Old 07-19-2013, 8:18 PM
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WOW love that stock. I wish mine looked like that. If TRAP55 isn't here soon shoot him a pm and he can help diagnosis the trigger group. Love mine, one of my favorite to shoot. To me its even fun to fondle and wonder where its been and done. Great score and wish you were closer we could get to the range.
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Old 07-19-2013, 9:01 PM
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That is really something else! Congrats!
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  #5  
Old 07-19-2013, 9:13 PM
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That is a sweet stock!
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Old 07-19-2013, 9:33 PM
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Very nice stock!

I think you need part 51 trigger spring.

The recoil springs ( there are two, one is slightly shorter than the other ) I don't know about replacing. Adjusting the gas valve can control how hard the bolt blows back.. Adjust the gas valve until you just get it to cycle.

Oh yes you need a pentagon wrench to adjust the gas valve. Be sure to clean this area out well before shooting. What condition is the piston and the cup?
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  #7  
Old 07-19-2013, 9:41 PM
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Would you look at that? Lovely stock!!!
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  #8  
Old 07-19-2013, 9:42 PM
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Quote:
Originally Posted by joefrank64k View Post
Would you look at that? Lovely stock!!!
Just LOOK AT IT. Just... JUST LOOK AT THAT STOCK.

(in case you dont get the reference... http://www.youtube.com/watch?v=EF8GhC-T_Mo )
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  #9  
Old 07-19-2013, 9:58 PM
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SA marked and a nice looking stock as well! Congrats!
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  #10  
Old 07-19-2013, 10:07 PM
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That wood just gave me wood. Very nice looking weapon there sir.
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  #11  
Old 07-20-2013, 8:43 AM
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Nice figure in that arctic birch stock!
List of things you need:
Trigger spring
Recoil springs}
Stainless gas piston & Cylinder} http://www.ppsh41.com/SVTitems.html
SVT-40 tool} http://www.blackrivergunsmithing.com...cessories.html
Broken case extractor} http://www.blackjackbuffers.com/inde...roducts_id=227
Rubber Mallet for opening the bolt when you screw up the gas adjustment
Spam cans of Russian light ball
AK-47 sight adjusting tool, works on the SVT and doubles as a stock bolt tool
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  #12  
Old 07-20-2013, 8:50 AM
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Nice! And that stock is beautiful! How much did you pay for it?
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  #13  
Old 07-20-2013, 11:11 AM
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Here are some recoil springs, I dont think they are new but the svt has that adjustable gas system so even old ones, provided they are not too worn out should do just fine.
https://www.buymilsurp.com/svt40-tok...d-p-40320.html

The trigger group is fairly simple its Russian after all, Pull it out and look for burrs on the mating surfaces, if you don't see anything then you probably got spring problems. check GB or the parts stores numrich or sarco.

Gorgeous rifle by the way I almost bought one just like it off GB a while ago, but the seller never responded to my questions.
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  #14  
Old 07-20-2013, 11:16 AM
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Nice looking Finnish capture. These actually go for more than refurbs when seller is "in the know."
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  #15  
Old 07-20-2013, 1:46 PM
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Bought it as a lot of rifles, so the cost of the SVT-40 was definitely very reasonable.

However, taking the gun apart, turns out the gun is missing the firing pin!

Fortunately, that's not that hard to replace, so I'll have to order that part from Numrich as well. It doesn't bum me out too much given the price I paid for the SVT.
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Old 07-20-2013, 2:01 PM
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Quote:
Originally Posted by Syntax Error View Post
Bought it as a lot of rifles, so the cost of the SVT-40 was definitely very reasonable.

However, taking the gun apart, turns out the gun is missing the firing pin!

Fortunately, that's not that hard to replace, so I'll have to order that part from Numrich as well. It doesn't bum me out too much given the price I paid for the SVT.
A lot, eh? What else did you get, if you don't mind me asking.

Also, that sucks about the firing pin.
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Old 07-20-2013, 2:10 PM
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Quote:
Originally Posted by Emdawg View Post
A lot, eh? What else did you get, if you don't mind me asking.

Also, that sucks about the firing pin.


Some other neat rifles - I've already put the Danish Krag up for sale on CGN Marketplace, and the M1909 cavalry carbine is pending, but I'm keeping the rest for now.
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  #18  
Old 07-20-2013, 8:37 PM
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That is one magnificent looking SVT with that awesome stock!
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Old 07-22-2013, 9:40 PM
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Very very sweet. I need an svt, I hope one with wood like that.
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  #20  
Old 07-23-2013, 10:20 AM
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Ordered myself a new firing pin, firing pin spring, detent, sear spring, trigger spring, piston spring, and recoil springs (front and rear) from Numrich. This should hopefully bring my SVT-40 back into servicable condition.
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  #21  
Old 07-23-2013, 10:54 AM
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You should have got the recoil springs from Bill Berg in the link I posted. Numrich's SVT-40 parts are well used. Can you post a close up of your gas piston and the inside of the gas cylinder?
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  #22  
Old 07-23-2013, 8:25 PM
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Hopefully the Numrich springs will have to do. I've ordered springs from Numrich in the past and they don't seem to be second hand, but new reproduction. I even ordered a small plunger spring for a Luger to fix a trigger reset issue, too.
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  #23  
Old 07-28-2013, 3:28 PM
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So I got in the new springs from Numrich, and the trigger reset issue still hasn't been fixed with a replacement trigger spring. I am noticing, however, that the trigger bar seems to have an intermediate "ledge" in the shape of the trigger bar that is catching on the frame of the trigger assembly, and pushing the trigger forward uncatches the trigger bar from the frame and properly into the sear notch for the trigger bar. Is this the normal shape for an SVT-40 trigger bar? I suspect this may be a fitting issue with this part with my particular trigger group, and would filing this ledge away be advisable?
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  #24  
Old 07-28-2013, 4:01 PM
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Hmm, the trigger issue seems to have resolved itself. Maybe it's the way I placed the trigger bar in the trigger group that caused a hangup. It seems to function reliably now.
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  #25  
Old 07-28-2013, 6:14 PM
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I like that SVT-40 show character!
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