1. The Forum Rules have undergone some minor changes and updates.  Please take the time to read them; it will only take a couple of minutes of your time. By doing so, you lessen the chance of incurring the wrath of the moderation team or making yourself look foolish to other members.

    90% of users posting adverts in the Sales forums need to be reminded to read the rules as their posts are wrong.  This is unnecessarily time-consuming and will no longer happen - if your advert doesn't follow the Sales Rules it will be deleted and you'll have to start all over again.

    To close this box once you've read it (and the Rules), click on the X in the top right-hand corner.

    Thank you.

    AGF Staff



    Dismiss Notice
  2. A reminder of one of the Forum Rules:

    'Behaviour

    Do not make inappropriate or offensive posts - including threats, harassment, swearing, prejudice, defamation, deliberate insults or name-calling, other negative remarks about this forum, its moderators and administrators or your fellow members. Even if this is just your own personal opinion, RESPECT YOUR FELLOW MEMBERS.'

    There have been changes made to our censoring software in an attempt to help with this growing problem.

    Click the X in the top-right-hand corner to dismiss this notice.
    Dismiss Notice
  3. Dear members,

    Our membership (like our country) consists of people from all walks of life; different in far more ways than can be listed here and each with a different view based on their experience of life - regardless of their colour, religion or cultural heritage. Every single person in the UK has been born of mixed race – we are a multi-coloured and multi-cultural country.

    As many of you are aware there are a handful of individuals amongst this membership that persist in making provocative, inflammatory, racist and otherwise offensive comments. This has been happening across the forum to a certain degree but is most especially prevalent in the Adult section.

    The moderation team has tried to stay on top of this, however unfortunately because of the ‘offensive’ nature of much of its content we don’t monitor the Adult section quite as much as perhaps we should. As a result much of this behaviour has gone unnoticed unless it has been reported to us. While the team always intended to take a "light touch" approach to the Adult section it would seem that some people aren’t quite adult enough to be left unmonitored after all.

    This behaviour is, and always has been against Forum Rules as well as the specific stipulations of the Adults forum and it will no longer be tolerated. We feel it's time to draw a line in the sand and as such from this point onward offenders will receive an immediate and permanent ban from the forum.

    In order for us to achieve our goal of restoring the forum to the friendly and tolerant place it once was, we ask that ALL members be mindful of the content they post and help us to stop unacceptable behaviour by using the 'Report' tool at the bottom of any offending post - the results of which can be seen only by Admin/Moderators.

    You should all receive a copy of this message by PM. 

    To close this message box, click on the 'X' in the top-right-hand corner.

    Dismiss Notice
  4. Hotmail block emails from us entering your inbox. Unless you can setup a safe sender you will not get activation emails from the forum. Please use an alternative provider or complain to Hotmail.
    Hotmail addresses include.

    @Hotmail.co.uk @Hotmail.com @outlook.com @Live.com
    Dismiss Notice
  5. Postings on Politics, Religion & Controversial Off-Topic Material

    The majority of users do not want to read about these subjects and people have left the forum as a result of it – this is after all an 'Airgun' Forum. It’s all very well to say they don’t have to read it if they don't want to, but as most of us use the ‘New Posts’ button there is no easy way to avoid it.

    All AGF staff members are in favour of people being able to discuss what they want, but we have to draw the line somewhere if it is upsetting other users. We don’t want to read about these topics either.

    IMPORTANT- The discussion of politics and religion is no longer allowed anywhere on the forum (including the Adult section).  The only exception is if it's airgun related - they must be put in the Airgun Related Politics section..

    We will not tolerate bullying or personal attacks, racism or any other offensive 'isms'. we will remove these topics from the forum, we will not give you an area where you can abuse each other. We will not hesitate to ban offenders.

    To clear this text box, click on the 'X' in the top right-hand corner.

    Dismiss Notice

P15 Breech Sealing Issues

Discussion in 'Anything Airgun Related' started by svendogg, Aug 3, 2019.

  1. svendogg

    svendogg Engaging Member

    Messages:
    128
    Likes Received:
    14
    Location:
    Tyldesley
    Was getting a small puff of air from the breech when firing my P15, I put this down to the breech o ring, thought I damaged it when cleaning the barrel. Changed it, still same issue. Restripped and found a barrel outer o ring nicked, changed both but still getting the same issue.
    Am I better uprating the o rings from stock spec, or am I missing something?
     
  2. ped

    ped Posting Addict

    Messages:
    1,758
    Likes Received:
    738
    Location:
    leeds
    std Chinese o rings don't have a good reputation
    i haven't a p15 set available yet as i haven't a p15 to test with but have made a set up based on a spares set that came with a gun and the sizes shown on a schematic(both were different in number and sizes of rings req) but one has been sent out as a tester
    I'm hoping to have them available asap
     
  3. 32:1

    32:1 Theoben user

    Messages:
    2,181
    Likes Received:
    1,772
    Location:
    Chelmsford
    Inner breach oring is d7.5x1.5 barrel to block are d12x1.5

    Also check where its leaking from as it could be the valve stem seal letting by (d9x1.5)

    Chris
     
    terry1001 likes this.
  4. svendogg

    svendogg Engaging Member

    Messages:
    128
    Likes Received:
    14
    Location:
    Tyldesley
    It's a puff of air against my cheek on firing, so it's deffo the breech area
     
  5. ped

    ped Posting Addict

    Messages:
    1,758
    Likes Received:
    738
    Location:
    leeds
    that's not the right sizes for the o rings
    barrel seals are
    9x1.5
    and probe seals are
    4.5x1.5 for .177
    5.5x1.5 for .22
    6.5x1.5 for .25
     
  6. 32:1

    32:1 Theoben user

    Messages:
    2,181
    Likes Received:
    1,772
    Location:
    Chelmsford
    I was going from the info sent to me by SPA via a pdf, Ive bought the sizes in their file ?


    Chris
     
  7. 32:1

    32:1 Theoben user

    Messages:
    2,181
    Likes Received:
    1,772
    Location:
    Chelmsford
    Infact the only difference is they take the od and yours is id I think ??


    Chris
     
  8. svendogg

    svendogg Engaging Member

    Messages:
    128
    Likes Received:
    14
    Location:
    Tyldesley
    One of you is quoting inside diameter and one of you is quoting outside. I believe both you gents are correct on the sizes.

    I've ordered some nitrile 70 breech and barrel o rings so I've got a stock of them, going to strip and deburr the ports as I think that's what's chewing up the barrel seals.
     
  9. 32:1

    32:1 Theoben user

    Messages:
    2,181
    Likes Received:
    1,772
    Location:
    Chelmsford
    Could still be valve !

    Put some oil around probe and barrel in breech and watch for leak

    Chris
     
  10. ped

    ped Posting Addict

    Messages:
    1,758
    Likes Received:
    738
    Location:
    leeds
    possibly but metric o rings are always sized by internal bore x section
     
  11. svendogg

    svendogg Engaging Member

    Messages:
    128
    Likes Received:
    14
    Location:
    Tyldesley
    Forgive my ignorance Chris, but I'm not following how the valve could be the cause of this. Can you explain ease?
     
  12. Dennis74

    Dennis74 Active Member

    Messages:
    45
    Likes Received:
    26
    These are the p15 -ring sizes (from Dutch airgun forum) .

    Shout if you need me to translate ;)[​IMG]
     
  13. 32:1

    32:1 Theoben user

    Messages:
    2,181
    Likes Received:
    1,772
    Location:
    Chelmsford
    As the valve gets knocked open the air rushes through the chamber and up through port in block to barrel, well the valve has an oring to stop the air blasting past the port and into hammer chamber, that's kinda simple but you get the picture

    Chris
     
  14. svendogg

    svendogg Engaging Member

    Messages:
    128
    Likes Received:
    14
    Location:
    Tyldesley
    Ok Chris that makes sense.... Where is it's route out then if that's the case?
     
  15. svendogg

    svendogg Engaging Member

    Messages:
    128
    Likes Received:
    14
    Location:
    Tyldesley
    Yeah, translation would be handy if you don't mind
     
  16. 32:1

    32:1 Theoben user

    Messages:
    2,181
    Likes Received:
    1,772
    Location:
    Chelmsford
    Id do the leak test around breach first

    Chris
     
    svendogg likes this.
  17. Dennis74

    Dennis74 Active Member

    Messages:
    45
    Likes Received:
    26
    Muzzlebreak 22x2

    Cylinder front 22x2,5

    Cylinder -> breechblock 14x2

    Gauge 8x1,5

    Inside filling valve 5x1,5

    Between regulator and plenum (regulated air reservoir 19x2

    Regulator body 22x2,5 (2x)

    Filling Probe 4x1,5 (2x)


    Probe seal (in .22 barrel) 5,5x1,5

    Outside barrel (sealing the tp) 9x1,5 (2x)

    Hammerspring adjuster 9x1,5

    Valve housing body large 9x1,5
    Valvehousing body small 6x1,5

    Regulator large 8,5x2
    Regulator small 3x1,5

    Pressure adjustment screw 3x1,5 (2x)
     
    RapidStype, ped and svendogg like this.
  18. ped

    ped Posting Addict

    Messages:
    1,758
    Likes Received:
    738
    Location:
    leeds
    that list does differ from the sizes I took from a spare seal set
    on my list was no 3x1.5's and it was 9x2 instead of a 8.5x2
     
  19. RapidStype

    RapidStype Busy Member

    Messages:
    613
    Likes Received:
    480
    Location:
    GOLDTHORPE ,S YORKS
    Anyone doing these as a set yet..??..mine is a .25
    The green ones are holding up but I think some quality spares would be good to have around.
     
  20. 32:1

    32:1 Theoben user

    Messages:
    2,181
    Likes Received:
    1,772
    Location:
    Chelmsford
    You need d9.5x1.5

    Chris
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice