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Advice on spring replacement RWS 350 Magnum

March 29 2007 at 5:12 PM
  (no login)
from IP address 24.167.96.247

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I bought an RWS with a broken spring and am trying to replace it with a factory one. I put everything back correctly as far as I know, but the gun will not cock. The barrel will only break to about a 90 degree angle and go no farther. My RWS 34 barrel breaks to about 120 degree angle. Also the spring seems really tight and difficult to compress. It kind of feels like I have too much spring in the gun, but looking at it before I installed the new one: matched the old one pretty well. I know I have to pull it down again, just wondered if anyone had a ready answer. I know I am not the first to play with one of these. Thanks in advance. LG

 
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AuthorReply

(Login bigferret)
72.40.173.105

Re: Advice on spring replacement RWS 350 Magnum

March 29 2007, 7:45 PM 

http://www.yellowforum.com/

Try using this forum address. You might get a quicker reaponse from
somebody who has seen this problem. It is very active in there and
frequented by some of the most knowledgable airgunners out there.

 
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Benson
(no login)
24.150.217.32

350 Magnum

March 30 2007, 10:04 PM 

Hi Lonegunman
When you have the gun assembled it must be ouy of the stock. Turn the rifle over on its back. OK now slip the cocking linkage out of the slot in the compression tube. there is a little notch in the piston, make sure the little claw at the end of the cocking linkage is fitted in this slot in the piston. Wheh this is done leave the gun on its back, place the stock on the gun when it is still upside down. Now put the trigger guard screw in first, then the other 2. Never try to cock your rifle when it is out of the stock or you will damage it. HTH.

Regards Benson.

 
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(no login)
124.177.134.142

Re: Advice on spring replacement RWS 350 Magnum

March 30 2007, 1:24 AM 

I assume the stock is on?
Haven't they got an articulated cocking arm?
I've only seen one over here.

 
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stepar
(Login stepar)
75.72.43.134

Bad Diagram

March 31 2007, 5:56 AM 

I understand that the official RWC exploded digram shows a part - I beleive the sear - upside-down. If you were going faithfully by the diagram, this would obviously be a problem; however, I don't see it as one that would prevent the barrel from being drawn back past 90 degrees. My first step would be to take it back apart, thinking very hard the whole time.

 
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(Premier Login rbva)
76.184.249.126

Sorry I cant help you LG, I do have a 350 as well.

March 31 2007, 6:03 AM 

where in TX are you and what's the SA for? I'm an ex SA living in TX ...... was just guessing?

If we're close enough we could put the 2 rifles side by side and compare them to see whats wrong. It could be two things, like you say - too much spring, or the top sear of the trigger is catching the piston and not lettimg it got the last 2" to complete the cock.

Good luck with this man, I'm having "heavy scope" problems, where the scope stop and mount are detroying the rail due the scope being too heavy. I just got a ligter scope and need to replace the rail and cant get mine off ...... so see, you are not alone. hehe..

 


 
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Benson
(no login)
24.150.217.32

350 Magnum cocking link problems.

March 31 2007, 8:13 PM 

Lonegunman the posts from Hector Medina and 6TallDog on page 45 on this forum. Just bought a new 250 and it will not cock. He is talking about the 350 magnum. there is 22 posts, read them all. Hector gives a good explanation about the trouble you are having with your 350.

Regards Benson.

 
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Big D
(no login)
64.75.158.2

Tubular sleeve

March 31 2007, 6:24 AM 

Ran into that same problem on a new 350. The tubular sleeve that the spring fits into, that inserts into the piston is bent, so when you try to cock the gun it it catches the spring and will only go so far but never catch. Take it apart inspect this sleeve for damage. I pounded mine straight useing a metal dowel until I got the new part in.
Hope this helps.

 
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6talldog
(no login)
72.38.209.162

Yes, I would imagine

April 6 2007, 7:32 AM 

that is exactly what happened here. As you said, the piston sleeve gets bent very easily if the cocking linkage puts any presssure on it with the stock off the gun. Be very careful when disassembling the gun to fix this, as the spring is caught on this bent sleeve and is under much more compression than the gun would normally be in an uncocked state. It is, literally, half-cocked.

 
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Anonymous
(Premier Login rbva)
76.184.249.126

You have got the trigger sear running inside the tube....

April 13 2007, 5:54 AM 

It should be on the outside. I made the same mistake when I first put mine together. It's easy to do because the sear automatically tries to go in through the bigger rear slot. You need to lift it and push the whole trigger mechanism forward till it comes out and up and over, with just the front tip of it then "clicking" into place the little forward slot. (where it hooks the piston from)

While it's inside the tube, the piston hits it while traveling backward to cock, it cant lift and catch the edge of the piston because it trapped inside the tube.

Good luck.


 
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(Login ferdaswans)
24.167.96.247

Mystery solved

May 14 2007, 9:06 PM 

Thanks to everyone for all of the information. Most helpful. I finally got back to the gun and what I found was that the cocking lever had dug into the thin sheet metal tube which shields the spring. This did happen becasue I attempted to gently cock the action out of the stock. This caused the arm to come down at an angle and cause the dent, rather than run paralell to the reciever. This dent then trapped a portion of the spring up in the piston and I was only compressing a portion of the spring, very tightly and it would not cock. I replaced the shield and put the gun back togehter but then the gun would not cock until you first pressed the trigger, then the piston would grab the latch. Very dismaying and also very dagnerous. Most of the parts breakdowns are not very clear, but I finally determined that a part was missing from the trigger assy. There is a crescent moon shaped disc on top of the trigger housing which keeps pressure on the coil spring right there near the safety lever. This crescent was missing and therefore the the trigger would not open up and let the piston pin enter. All back together now and working great. Thanks for all of the help. LG

 
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