Canadian Airgun Forum

The #1 Community for Airguns in Canada!
It is currently Fri Dec 13, 2019 11:49 am

All times are UTC - 5 hours


The Canadian Airgun Forums are a place for people to discuss and learn about airguns and the airgunning sport in Canada. There are lots of discussions about airguns, airgun accessories, reviews, modification and repair information, airgun events, field target and free classifieds!

 

You need to register before you can post: click the register link to proceed. Before you register, please read the forum rules. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload your own pictures, and access many other special features. Registration is fast, simple, and absolutely free! To start viewing messages, select the forum that you want to visit from the selection below.








Post new topic Reply to topic  [ 19 posts ]  Go to page 1, 2  Next
Author Message
PostPosted: Tue May 03, 2016 7:30 pm 
Offline

Joined: Sun May 01, 2016 10:16 pm
Posts: 61
Hi all again. So tonight I disassembled my Telly Air rifle that I recently purchased that did not shoot. The gun itself as a whole is in decent condition, but after your advice here, I disassembled it and found the problem. The piston seal is not even toast, it is non-existent! So I did my homework and found how to make a cupped seal. The problem arises with the proper disassembly of the piston. The red part in the picture is in good condition. It is the 'pin' or 'rivet' that concerns me. Firstly, what is the best way to remove said pin, although I am sure by carefully drilling it would be best. But secondly, and more importantly, what do I or can I use to replace it. It is not a standard rivet as I had thought. Any help would be greatly appreciated in this matter.
Does the seal have to be 'cupped, or would a flat disc slightly oversized be alright? Thank you in advance for any and all help and advice.

P.S. Once I figure this one out, I will attempt the more complex Marksman....


Attachments:
piston2 (3456 x 1944).jpg
piston2 (3456 x 1944).jpg [ 649.22 KiB | Viewed 1203 times ]
Top
 Profile  
 
PostPosted: Tue May 03, 2016 7:44 pm 
Offline
User avatar

Joined: Mon Feb 11, 2013 12:46 am
Posts: 4179
you can make a leather seal very easily do a how to search Google is your friend.... :wink:
that red section can be removed and used again you have to get the right size punch just enough to enter into the rivet from the inside and place the rivet in a hole on a peace of wood just big enough for it to pass through, then slowly punch the rivet till it un mushrooms...did one of these not to long ago ill see if I v=can find some pics...

_________________
"A candle loses nothing by lighting another candle"

Image


Top
 Profile  
 
PostPosted: Tue May 03, 2016 7:49 pm 
Offline

Joined: Wed Jul 01, 2015 2:14 pm
Posts: 305
Location: Manitoba
Mine was loose enough that I could tap it out with a punch but drilling would probably be a better option. I replaced the rivot with a small bolt that I shaped to fit like the original, then locktighted the nut to the bolt. You can also go to Vortek site and buy a seal kit that will replace the leather seal.
Check out reply #33 here. http://www.gatewaytoairguns.org/GTA/index.php?topic=103517.0


Top
 Profile  
 
PostPosted: Tue May 03, 2016 8:50 pm 
Offline

Joined: Sun May 01, 2016 10:16 pm
Posts: 61
Thanks for the tips so far. They are both good pieces of advice and help. I think that I may first attempt to remove and save the rivet to reuse it, because if I can't I have nothing else to lose but to replace it. If I cannot get it to come out I will have no option other than using a nut and bolt.
If, however, I fail at removing the rivet and have to use a bolt, I am assuming that I would get a bolt/screw the same diameter as the hole in the piston?
Thank you again.


Top
 Profile  
 
PostPosted: Tue May 03, 2016 8:52 pm 
Offline

Joined: Sun May 01, 2016 10:16 pm
Posts: 61
Ace wrote:
you can make a leather seal very easily do a how to search Google is your friend.... :wink:


Yes, thank you. I am not sure who it was, but yesterday it was suggested to Google 'how to make a leather seal' and is where I found the links to make one in the wood block with a socket, thank you.


Top
 Profile  
 
PostPosted: Tue May 03, 2016 9:13 pm 
Offline

Joined: Sun May 01, 2016 10:16 pm
Posts: 61
@robertr - If you don't mind me picking your brain, I have just a quick little question. If it comes down to me making a bolt to fit, do you possibly recall the allowable height of said bolt used as I am thinking that it may possibly hit the end of the chamber? Thank you.


Top
 Profile  
 
PostPosted: Tue May 03, 2016 10:30 pm 
Offline

Joined: Wed Jul 01, 2015 2:14 pm
Posts: 305
Location: Manitoba
I ground down the seal side of the bolt making it round and flush with the insert just like the rivet. On the inside of the piston I just made sure there were enough threads to catch the bolt securly. You might have to round the edges of the nut so the spring fits over the nut with no binding.


Top
 Profile  
 
PostPosted: Tue May 03, 2016 10:40 pm 
Offline

Joined: Sun May 01, 2016 10:16 pm
Posts: 61
Thank you for your reply. I now have two great starting points!


Top
 Profile  
 
PostPosted: Wed May 04, 2016 8:30 am 
Offline
User avatar

Joined: Mon Feb 11, 2013 12:46 am
Posts: 4179
ok found the pics I wasn't as lucky as you I had to make a new piston bumper stop out of delrin the one I had was broken in peace's and also the leather seal was toast...but as you can see from the pics I was able to salvage and reused the riveted pin... :wink:


Image
Image
Image
Image
Image
Image

Home made leather seal....
Image
Image
Image

_________________
"A candle loses nothing by lighting another candle"

Image


Top
 Profile  
 
PostPosted: Wed May 04, 2016 9:12 am 
Offline

Joined: Sun May 01, 2016 10:16 pm
Posts: 61
Great pictures. Thank you for the help again.


Top
 Profile  
 
PostPosted: Wed May 04, 2016 6:00 pm 
Offline

Joined: Sun May 01, 2016 10:16 pm
Posts: 61
@ Ace - Thanks again for the tip. I was able and successful in removing the pin and will be able to reuse it as well. I carefully hammered it through on a vice and inside socket in which was slightly bigger than the remaining plastic piece so it would not be damaged. In the meantime, I got that ready and I found a piece of leather. I drilled a 1" hole in a piece of wood, then wet it and put it over top of the hole. I then got a 1/2" socket with a 3/4" outer diameter and pressed the leather in the hole using a vice. I am now letting it sit for a day to dry and see how it looks. I did not have the mentioned oil handy so my dad said to use water and I did. So I will probably try to reassemble the gun tomorrow, and if not, on the weekend for sure. As it is apart, I will definitely clean all parts of the gun before reassembly. I will get a couple of pictures tomorrow of at least the parts as it is now at my parents house. Stay tuned!


Top
 Profile  
 
PostPosted: Wed May 04, 2016 6:02 pm 
Offline

Joined: Sun May 01, 2016 10:16 pm
Posts: 61
I just realized something I think may be worth of mention. Does the orientation of leather make a difference. I had placed it so that the shiny\good side will be on the outside of the 'cup'. Or do I need to have the 'rough side' on the outside? Thank you again.


Top
 Profile  
 
PostPosted: Wed May 04, 2016 8:32 pm 
Offline
User avatar

Joined: Mon Feb 11, 2013 12:46 am
Posts: 4179
I don't think it matters as long as it has a decent fit when installing the piston back on the tube, you don't want it to be to tight that you cant move the piston by hand and not very loose that it just fall down the tube on its own, hope that makes sense.

_________________
"A candle loses nothing by lighting another candle"

Image


Top
 Profile  
 
PostPosted: Wed May 04, 2016 9:05 pm 
Offline

Joined: Thu Nov 02, 2006 4:57 pm
Posts: 1754
Location: mb
Quote:
Great pictures.

Those are really great pictures. I almost feel like I had the gun apart in front of me. . . . tip of the hat @ Ace. Bravo!

_________________
Don't Be Sexist - Broads Hate That.


Top
 Profile  
 
PostPosted: Wed May 04, 2016 9:24 pm 
Offline

Joined: Sun May 01, 2016 10:16 pm
Posts: 61
Ace wrote:
I don't think it matters as long as it has a decent fit when installing the piston back on the tube, you don't want it to be to tight that you cant move the piston by hand and not very loose that it just fall down the tube on its own, hope that makes sense.


Clear as mud! :mrgreen: Thank you again. I am now really hoping that I have time tomorrow now more than ever to get this thing together, but time is now not looking like it is on my side.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 19 posts ]  Go to page 1, 2  Next

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 3 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
News News Site map Site map SitemapIndex SitemapIndex RSS Feed RSS Feed Channel list Channel list

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

phpBB SEO