Jump to content

Seals on PCP air rifles - Fix them yourself.


Evilv
 Share

Recommended Posts

I have a couple of rim fire rifles and a few shotguns, but I also have a Webley Axsor which I've had lying around for a long time since I got my FAC. The rifle developed a fault and wouldn't hold air. It could rain its full cylinder capacity in about two minutes from 2000PSI to zero.

 

I'd thought of having it fixed, but the costs were high. Even a seal kit wasn't that cheap and I wasn't sure I would be able to do the job without getting in a mess.

 

I watched a video on the web and the video maker showed a large box of seals he got on ebay. There are 419 seals in the kit which costs only £5.85 delivered. This is about the price of ONE tiny inlet valve seal plus delivery from Chambers.

 

There is huge range of sizes in the kit and I was easily able to service my rifle using a handful of my 419 O rings. I could service twenty air rifles with this kit which was less than £6 delivered to my door.

 

http://www.ebay.co.uk/p/419pc-o-ring-rubber-seals-plumbing-oring-kit/1682564175?_trksid=p2047675.l2644

 

There are a couple of sellers advertising this kit on ebay.

 

s-l500.jpg

 

You would be well advised to try and find a strip down video for your own rifle on Youtube.

 

Cheers

Link to comment
Share on other sites

I have one of these kits and they are very handy indeed,,,just be aware that the DIN number of many pressure bearing seals on a PC rifle may be quite different,,,that is harder. These rings in the kit are fairly soft and may not have the same wear characteristics or pressure resistance as the original parts. The good news is that virtually all the rings you need,at the correct rating, are available for pennies from that site and others.

Link to comment
Share on other sites

Interesting points raised re hardness. It looks more complicated than I thought. On the other hand, my old Axsor which used to empty in a minute, has been at 2000 psi for 18 hours.

 

I was cautious about taking it apart thinking it would be a beggar to put together again, but it isn't, as long as you keep track of what bits go where. The phone camera is a great help there in recording how things are put together before you pull them all apart.

 

By the way - and I expect you all know this, but just in case - DON'T use ordinary grease or oil anywhere near rubber. You need some silicone grease to lube the seals. Mineral oil based lubricants destroy the rubber very fast. It goes hard and crumbly. That is what was wrong with mine. If the person who put it together the last time before I got it had used silicone grease, I'd not have needed to take it apart at all.

Edited by Evilv
Link to comment
Share on other sites

Quite right,,silicone grease rather than mineral based grease on o-rings is the way to go. An alternative,,which all Rapid 7 owners will know of is Molykote 33 which can be used throughout your PC rifle assembly as it is an excellent lubricant on all surfaces including O-rings.

Edited by Velocette
Link to comment
Share on other sites

  • 2 weeks later...

Quite right,,silicone grease rather than mineral based grease on o-rings is the way to go. An alternative,,which all Rapid 7 owners will know of is Molykote 33 which can be used throughout your PC rifle assembly as it is an excellent lubricant on all surfaces including O-rings.

done a search for molykote 33

and also found MOLYKOTE® 55 GREASE

can`t work out the difference yet

but thanks for the heads up

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...