Results 1 to 3 of 3

Thread: AA S400 seal replacement.

  1. #1
    Sharp Shooter
    Forum Sponsor

    User Info Menu

    Default AA S400 seal replacement.

    Fellow tinkerers,

    Trusty old S400 started leaking after 10 years of service so I ordered a seal kit and followed the instructions to replace them. Putting everything back together I was relieved to find no new leaks however the rifle will now shoots at no more than 300 fps. :-(
    What did a do wrong? Where do I start checking for the apparent post seal replacement choke?
    Sign Up To Air Rifle SA Forums

  2. #2
    Marksman
    Forum Sponsor

    User Info Menu

    Default

    Good afternoon

    I believe you replaced all the o-rings thus dissembling the barrel from the block / action

    When re- assembling the 2 sections an o-ring between barrel and block /action because of tension of the Allen screws distorts and sticks its head down the firing port (my own description) thus obstructing the normal flow of air to the breach.

    So when screwing all of this back be wary of this little o-ring that might decide to get in the way.

    How do I know? - happened to me - 3 days to figure out.

    Hope this helps.

    Regards
    Sign Up To Air Rifle SA Forums

  3. #3
    Sharp Shooter
    Forum Sponsor

    User Info Menu

    Default

    Ta Pirate,
    Will take it apart again next Sunday and check, sounds like I have a similar issue.
    Sign Up To Air Rifle SA Forums


Similar Threads

  1. Replacement o-rings.
    By Neil W in forum Airgun Discussions
    Replies: 5
    Last Post: 18-09-17, 09:13
  2. Looking for a seal kit for AA S400
    By Damoni in forum Airgun Discussions
    Replies: 3
    Last Post: 18-05-17, 21:14
  3. Where to find a replacement Norica piston-seal?
    By Tinker in forum Airgun Discussions
    Replies: 16
    Last Post: 12-04-15, 19:09
  4. S400 MPR cylinder valve seal
    By adrsny001 in forum Airgun Discussions
    Replies: 0
    Last Post: 09-12-11, 07:02

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Friends of Air Rifle SA