Canadian Airgun Forum

The #1 Community for Airguns in Canada!
It is currently Fri Nov 22, 2019 9:48 pm

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  [ 13 posts ] 
Author Message
 Post subject: Benji classic main seal?
PostPosted: Thu Aug 08, 2013 10:06 pm 
Offline
User avatar

Joined: Sat Jun 08, 2013 2:43 pm
Posts: 282
Location: its all in the location
Now that I have put about 1000 pellets through this rifle. I'm going to disassemble clean, deburr lube and polish what I can. So I was hoping for a blemish free seal, but upon taking it apart my seal might be questionable..


first pic isn't marked with an arrow

Image
Image
Image
Image

First time doing this, any help would be appreciated.. thx 8)

_________________
benji classic .22/ HIPAC 2260 .25/QB78 PCP .22/ 2289 .22 FTP/ 1377 .177/ polished 357crosman .177/ 2240 .177 /P17 .177/ G&G .45 6mm

"When Obi-wan talked about the darkside of the force who knew he was referring to windows...?"


Top
 Profile  
 
PostPosted: Thu Aug 08, 2013 10:25 pm 
Offline

Joined: Sat Sep 08, 2012 3:33 pm
Posts: 484
Location: Montreal
looks like nib from molding, besides its not on the sealing surface.


Top
 Profile  
 
PostPosted: Thu Aug 08, 2013 10:56 pm 
Offline
User avatar

Joined: Sat Jun 08, 2013 2:43 pm
Posts: 282
Location: its all in the location
I thought the outer edge of the seal is the main sealing surface. With this imperfection had doubt that it was working.. like I said first time. Wasn't going to do all this work and reinstall a bad seal. cheers!

_________________
benji classic .22/ HIPAC 2260 .25/QB78 PCP .22/ 2289 .22 FTP/ 1377 .177/ polished 357crosman .177/ 2240 .177 /P17 .177/ G&G .45 6mm

"When Obi-wan talked about the darkside of the force who knew he was referring to windows...?"


Top
 Profile  
 
PostPosted: Thu Aug 08, 2013 11:14 pm 
Offline
User avatar

Joined: Thu Oct 13, 2005 6:52 pm
Posts: 7146
Location: Vancouver Island BC
doublevision wrote:
I thought the outer edge of the seal is the main sealing surface. With this imperfection had doubt that it was working.. like I said first time. Wasn't going to do all this work and reinstall a bad seal. cheers!

i would change that seal and clean the tube up and all the sharp edges


Top
 Profile  
 
PostPosted: Fri Aug 09, 2013 2:08 am 
Offline

Joined: Sat Sep 08, 2012 3:33 pm
Posts: 484
Location: Montreal
No just the lip, notice the outer edge slopes down, no way that portion is doing any sealing.

I took a look at one I had apart (not classic but same family), same mark same place, it's from the injection molding.

If you have spare on hand I guess it doesn't hurt to change it, but if not it takes only 10 minutes to take apart and put back together so you can do it later on anytime.


Top
 Profile  
 
PostPosted: Sat Aug 10, 2013 12:55 pm 
Offline
User avatar

Joined: Sat Jun 08, 2013 2:43 pm
Posts: 282
Location: its all in the location
Thanks for the input guys.. only thing i'm not sure about now is spring guides (out of plastic) and if a can smooth and polish everything inside? Thought I read somewhere your only supposed to use a hone for the tube walls. So if you don't have one just leave it alone?

_________________
benji classic .22/ HIPAC 2260 .25/QB78 PCP .22/ 2289 .22 FTP/ 1377 .177/ polished 357crosman .177/ 2240 .177 /P17 .177/ G&G .45 6mm

"When Obi-wan talked about the darkside of the force who knew he was referring to windows...?"


Top
 Profile  
 
PostPosted: Sat Aug 10, 2013 1:02 pm 
Offline
User avatar

Joined: Thu Sep 18, 2008 6:11 pm
Posts: 1961
Location: SW Ontario:Canada
I used a small dowel with a slot in the end. Slip fine emery cloth into the slot and attach drill to dowel. I had trouble finding a hone that would collapse small enough to fit the bore of the tube. Used a small file on slots and holes.


Top
 Profile  
 
PostPosted: Sun Aug 11, 2013 6:09 am 
Offline

Joined: Mon Mar 04, 2013 3:59 pm
Posts: 306
Location: Hamilton On
I too used a small fille to clean up any burrs but I like the dowel idea. I made spring guides out of plastic from packaging for some buttertarts (after eating the last one, yummy). Made a big improvement getting rid of the twang and really smoothed things out. Just carefully cut out a piece with an exacto blade until you have one complete wrap with no overlap. Haven't been back inside to see how they are holding up but I have put thousands of pellets down range since I did it.


Top
 Profile  
 
PostPosted: Sun Aug 11, 2013 11:53 am 
Offline
User avatar

Joined: Sat Jun 08, 2013 2:43 pm
Posts: 282
Location: its all in the location
Thanks for posting guys! This helps a lot.. does the plastic guide run the full length of the tube? I would have thought there should be a gap for the cocking arm/slot? cheers

_________________
benji classic .22/ HIPAC 2260 .25/QB78 PCP .22/ 2289 .22 FTP/ 1377 .177/ polished 357crosman .177/ 2240 .177 /P17 .177/ G&G .45 6mm

"When Obi-wan talked about the darkside of the force who knew he was referring to windows...?"


Top
 Profile  
 
PostPosted: Sun Aug 11, 2013 12:29 pm 
Offline
User avatar

Joined: Sat Apr 16, 2011 5:58 am
Posts: 495
Location: Eastern Ontario
idontknowjack wrote:
I had trouble finding a hone that would collapse small enough to fit the bore of the tube.

This is what I used on my Benji Trail NP (Hardwoods edition) when I had seal issues: https://www.acklandsgrainger.com/AGIPor ... RRBC151632

They are a bit pricey, but work like a charm!....and they come in every size/grit combo imaginable! :drinkers:


Cheers,
Todd

_________________
Cheers,
Todd


Top
 Profile  
 
PostPosted: Sun Aug 11, 2013 12:59 pm 
Offline
User avatar

Joined: Sat Jun 08, 2013 2:43 pm
Posts: 282
Location: its all in the location
Nice! I wonder if acklands is still on the island? For that price and only having one rifle I think i will go the dowel route.. would you use the same grit on a dowel and emery cloth hone? 320

_________________
benji classic .22/ HIPAC 2260 .25/QB78 PCP .22/ 2289 .22 FTP/ 1377 .177/ polished 357crosman .177/ 2240 .177 /P17 .177/ G&G .45 6mm

"When Obi-wan talked about the darkside of the force who knew he was referring to windows...?"


Top
 Profile  
 
PostPosted: Tue Aug 13, 2013 4:42 am 
Offline

Joined: Mon Mar 04, 2013 3:59 pm
Posts: 306
Location: Hamilton On
The plastic goes on either end of the spring where it rides on the top hat and piston weight. If you have spring and tophat in hand you will feel play where they meet up. Essentially you are shimming the play out. Got rid of the twang and settled the recoil down.


Top
 Profile  
 
PostPosted: Tue Aug 13, 2013 11:18 am 
Offline
User avatar

Joined: Sat Jun 08, 2013 2:43 pm
Posts: 282
Location: its all in the location
Thx for clearing that up.. thought it ran the length of the tube. I'm thinking a little pre load on the spring should do the same.

_________________
benji classic .22/ HIPAC 2260 .25/QB78 PCP .22/ 2289 .22 FTP/ 1377 .177/ polished 357crosman .177/ 2240 .177 /P17 .177/ G&G .45 6mm

"When Obi-wan talked about the darkside of the force who knew he was referring to windows...?"


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 13 posts ] 

All times are UTC - 5 hours


Who is online

Users browsing this forum: No registered users and 0 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