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 Post subject: Diana Magnum 350
PostPosted: Mon Apr 06, 2020 2:21 pm 
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Joined: Thu Jan 26, 2012 8:03 am
Posts: 290
Hey there

I got a magnum 350 and it stopped working properly it wouldn't caulk anymore.
I took the trigger apart and a piece of metal
Fell out well little tine piece almost like it didnt belong in there.
I put it back together still wont work.
Heres a pic


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 Post subject: Re: Diana Magnum 350
PostPosted: Mon Apr 06, 2020 3:28 pm 
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Joined: Fri Jan 22, 2010 1:17 pm
Posts: 2685
Location: Kingston, ON
It looks to me like a piece of pop can. So maybe it was tuned using a spring sleeve/piston liner made from a pop can which has become mangled, and preventing the rifle from cocking properly and allowing the trigger sear to latch on. You better strip it and have a look inside.

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 Post subject: Re: Diana Magnum 350
PostPosted: Mon Apr 06, 2020 4:11 pm 
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Joined: Thu Jan 26, 2012 8:03 am
Posts: 290
Yeah ill take it completely apart and see what's going on i was surprised when it fell out when i took out the safety parts... So then take the complete trigger apart?


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 Post subject: Re: Diana Magnum 350
PostPosted: Mon Apr 06, 2020 4:26 pm 
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Joined: Sat Feb 28, 2009 12:28 pm
Posts: 713
They did come with a lined piston from the factory,use a good spring compressor ,usually 3 plus inches of preload,kelly


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 Post subject: Re: Diana Magnum 350
PostPosted: Mon Apr 06, 2020 6:52 pm 
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Joined: Wed Jan 05, 2011 12:35 pm
Posts: 7723
Location: P.G. B.C.
Dukemeister wrote:
It looks to me like a piece of pop can. So maybe it was tuned using a spring sleeve/piston liner made from a pop can which has become mangled, and preventing the rifle from cocking properly and allowing the trigger sear to latch on. You better strip it and have a look inside.


My impression as well, Duke.
Yes- with 3" of preload, you'll need a spring compressor.

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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 5:38 am 
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Joined: Thu May 07, 2015 8:30 pm
Posts: 1559
Location: Eastern Townships
mazda2002 wrote:
Yeah ill take it completely apart and see what's going on i was surprised when it fell out when i took out the safety parts... So then take the complete trigger apart?


Not just the trigger, the entire rifle. If a piece fell out of the rifle, there are high chances there are more inside, and I agree it could be the reason your rifle doesn't cock. JMO.

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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 9:51 am 
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Joined: Thu Jan 26, 2012 8:03 am
Posts: 290
Hey tks for the help
Wondering if anyone has a document with pictures on how to take this rifle apart?


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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 10:09 am 
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Location: Kingston, ON
mazda2002 wrote:
Hey tks for the help
Wondering if anyone has a document with pictures on how to take this rifle apart?

YouTube... it's better in colour with video and sound.
https://www.youtube.com/watch?v=rL4ukRx1Omo

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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 1:28 pm 
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Joined: Thu Jan 26, 2012 8:03 am
Posts: 290
This video is good but the metal part came out of the trigger part itself... i had everything apart except the trigger part.
Any diagram for the trigger itself?


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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 2:00 pm 
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Joined: Fri Jan 22, 2010 1:17 pm
Posts: 2685
Location: Kingston, ON
Is it a T-05 trigger, or post a photo of which one.
If there's nothing inside the chamber of interest, then the little piece was a shim in the trigger group for some unknown purpose. But I can't see it being a show stopper, so puzzled as to why it won't cock and/or latch.

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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 2:12 pm 
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Joined: Thu Jan 26, 2012 8:03 am
Posts: 290
Yes its a T05

Same not sure why it wont also i guess i have to take her apart again.


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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 3:18 pm 
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Joined: Fri Jan 22, 2010 1:17 pm
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Location: Kingston, ON
Here's one for the T-05 trigger.
https://www.youtube.com/watch?v=mL2KLl6GNy4

I worked on many T-05 triggers when I was into Dianas and Ruger "hawks", somewhere I have documents. PM me with your e-mail and I'll send you what I can find. :drinkers:

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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 3:56 pm 
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Joined: Mon Mar 30, 2020 5:50 am
Posts: 18
Can you fold the barrel back enough for the trigger sear to engage the piston? If not its likely not a trigger problem at all. Pieces coming from the action pretty much have to go through the trigger anyway. Or maybe theres a similar piece still stuck in the trigger.

To me it looks like a soda can liner aswell, did you buy this gun used?


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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 4:17 pm 
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Joined: Thu Jan 26, 2012 8:03 am
Posts: 290
Yes i bought it used from someone on here, it does look like a soda can but why would that be in there? And where would it be


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 Post subject: Re: Diana Magnum 350
PostPosted: Tue Apr 07, 2020 5:15 pm 
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Joined: Wed Jan 05, 2011 12:35 pm
Posts: 7723
Location: P.G. B.C.
If there is something holding the trigger in the fired position (back), the gun will likely not cock.

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