My TNW mg 34 wont cycle

[kenboehmer]

Shot my new 34 Sat and had to cycle by hand.. ejection worked but is a fancy bolt action could it just be break in to smooth things out? was using Privi factory ammo...

[42rocker]

I'm sure that several folks will be along to help out. It's a start and I wish I had one starting to fire.

Later 42rocker

[junglewalk]

When you say ejection happens, then all that's left is the next round being rammed into the chamber!......You are almost there with a complete cycle.
.......You chamber the round, you pull the trigger/it fires, bolt recoils to the rear & empty case is ejected, bolt returns foward ramming the next round into the chamber.
...so what do you see after ejection??

[kenboehmer]

I guess I need to clarify sorry. I cycle the charge handle gun fires, when I do it again by hand shell extracts and ejects. I dont think I getting the bolt to move enough to extract and eject. my first guess is either weak ammo. New privi commercial. or just not enough grease or needs to break in. I know I have had some really tight fitting 1911s that took about 200 rounds before they became reliable.

[junglewalk]

Ok, possibly weak ammo, but that ammo is pretty strong, and the blast cone, of course you do have it installed..? Without it under the flash hidder, there will be no recoiling of the bolt assembly. ...? (what size hole in the blast cone? Shooting 8mm though, whether small or large hole, the bolt should recoil)

There has to be TNW experts on here;....I had one for almost 7 years, and worked with it all the time. I mainly wanted it to shoot blanks. What a pain.

[anjongni]

Hi Ken, was your TNW new from the dealer, as a complete weapon? Is your receiver a re-weld using the "TNW firing system", or one of their receivers? If it's factory new, contact them directly of course. The guys are very helpful. Are you using their very heavy f/p spring? Might not be re-cocking. After it fires the first one, does it go "click?" Please do keep us up-to-date...Phil

[junglewalk]

......just reading what he has said, it does cock, and fires when he pulls the trigger, but does not recoil enough to eject, and subsequently ram the next round home on its own......The firing pin spring inside the bolt would not keep the bolt from recoilling and cycling properly.......I would be interested to know what is under the flash hidder.
.......On the other hand if he is using reloaded ammo, it is possible to reload/make pitifully weak 8mm rounds.

[kenboehmer]

Its brand new complete rifle from TNW. I called them and they told me the new manufacture PRIVI ammunition might not be strong enough to cycle the rifle. He also said to really run it lubed more than a normal gun. when you think its enough put on more. I havent tried the 75 yugo sniper ammo I just received yet but will post ASAP when I do.

[42rocker]

Good Luck with the new ammo.

Later 42rocker

[moselder71]

I am having the same problem, cycle it by hand it fires but no ejection, but you can pull the trigger like it wants to fire again, then I cycle of the bolt, shell ejects and fires again, its like a really expensive bolt action. bolt and everything sloppy wet, everything tight, using german 8mm brass surplus dated 1951, going to try some of the Romanian steel case ammo tomorrow to see if that helps, anyone have any more ideas? what about using an original recoil spring?

[moselder71]

Having the same trouble with my TNW MG34. Used 2 types of live ammo and then tried it with blanks still nothing. What happens is once the round is cycled and chambered it will fire, the round will never eject and the next round will never cycle. I pull back the bolt, the round ejects and then next one chambers and will fire, but then the cycle starts again. Pulling my hair out why wont it eject? and why wont it fire semi? any help would be greatly appreciated, Thanks.
Todd

[anjongni]

Hi Moselder, I have some ideas, might help. Although the weapon will cycle ammunition without a booster cone, you will need a very restricted one to cycle blanks. There are lots of variables; there are re-enactors here that have thousands of blanks down the barrel. They could certainly add some knowledge/advice on getting them to run consistently. Did you mean to try the standard recoil spring or f/p spring? I think most TNWs use the military recoil spring. Some of us use the original f/p spring. Seems to work well on commercial ammo. The -34 cocks on bolt opening. The TNW firing pin spring is very stiff. Take the bolt out and cock it in your hand. If it's hard to do, imagine the recoil of the case trying to reset the f/p. All that said, perhaps it's just old, dead ammo. I would purchase some modern, commercial (expensive, quality) ammunition, start with just a couple in the belt, maybe install the wartime recoil and f/p spring. Best of luck, keep us posted! Phil