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

Piston Seal Sizing!

Discussion in 'Technical' started by john79, Aug 12, 2018.

  1. john79

    john79 Keyboard Hero

    Messages:
    2,197
    Likes Received:
    616
    Location:
    kettering
    Hi looking for some advice from you springer shooter/tuner's!

    When you size a piston seal do you size it so it fall's under it's own weight ?

    I have a V-mach seal on my hw80 and ive took a bit of material off to get it to shoot at 10.8 but the seal is still tight and wont fall under it's own weight , so would you advise to leave it and let it bed-in or take some more material off?

    thank's
    john.
     
  2. shauny

    shauny Major Poster

    Messages:
    8,617
    Likes Received:
    5,564
    Location:
    Alltwen
    shouldnt fall under its own weight. should move with a bit of resistance. if you push the piston
    down the cylinder/comp tube and then block the tp,ideally it should stop. if blocking the tp
    doesnt stop it,youve taken too much off!.
     
  3. TORNADOS7

    TORNADOS7 Pro Poster

    Messages:
    6,298
    Likes Received:
    3,534
    Location:
    Devon
    It’s supposed to be able to fall under the weight of the piston but when the transfer port is blocked off it stays put... :thumb:

    Needing to skim down to within a knatts arse of its usable life seems to be a common issue with V-Mach seals, don’t know why people bother to deviate away from the originals if I’m honest, especially as ‘HW’ seals are very good so far as OE seals are concerned...
     
    john79 likes this.
  4. shauny

    shauny Major Poster

    Messages:
    8,617
    Likes Received:
    5,564
    Location:
    Alltwen
    thats too loose !when they fall down under their own weight,its time for the bin!
     
  5. TORNADOS7

    TORNADOS7 Pro Poster

    Messages:
    6,298
    Likes Received:
    3,534
    Location:
    Devon
    Interesting, you hear so many differing opinions over t’internet on how stuff should be done, t’is no wonder people get completely confused as to what to do is it !...

    Ps, I’d just stick to the ‘OE’ seals, much easier...
     
  6. shauny

    shauny Major Poster

    Messages:
    8,617
    Likes Received:
    5,564
    Location:
    Alltwen
    the hw seals are ok if you get a good one.of late ive been coming across far too many
    that are way to loose.dont know if its tolerances on the guns or on the seals.
     
    TORNADOS7 likes this.
  7. TORNADOS7

    TORNADOS7 Pro Poster

    Messages:
    6,298
    Likes Received:
    3,534
    Location:
    Devon
    If they’re anything like last ‘new’ Weihrauch I bought then it’ll probably be both, Weihrauch need to make some serious inroads into their QC before I ever put my money on another new one...

    One of the reasons I bought my current 2004 ‘80’ whilst I had the chance !...
     
    shauny likes this.
  8. john79

    john79 Keyboard Hero

    Messages:
    2,197
    Likes Received:
    616
    Location:
    kettering
    The reason I fitted a v-mach seal was because the original seal was letting air past it was very hard and had a defect on the side upload_2018-8-12_16-32-13.png
     
    TORNADOS7 likes this.
  9. TORNADOS7

    TORNADOS7 Pro Poster

    Messages:
    6,298
    Likes Received:
    3,534
    Location:
    Devon
    That’ll be where the plastic is injected during the moulding process ‘although’ why the hell they put the access point so close to the lip of the seal is feck’n beyond me... :facepalm:
     
    john79 likes this.
  10. cooper_dan

    cooper_dan Engaging Member

    Messages:
    453
    Likes Received:
    461
    Location:
    Swadlincote
    I would leave it and let it bed in on its own
    My TX piston doesn't fall in overly easy, needs a bit of a push. But shoots fine. Power crept up a bit for a few hundred pellets but has now levelled out. Still needs a bit of a push to get it in though

    The risk is always taking too much off and having to start again
     
    john79 likes this.
  11. robs5230

    robs5230 Pro Poster

    Messages:
    5,936
    Likes Received:
    4,522
    Location:
    bideford devon
    That does depend on how the fit is though. No point having a seal that tight it honks like a goose.
     
    john79 and shauny like this.
  12. SteveO

    SteveO Honk! Honk!

    Messages:
    10,154
    Likes Received:
    8,439
    The Aussie Red seals from Custom Air seals size themselves after a hundred or so shots, they squeak for a bit after being fitted then they settle down and go quiet.

    I won't use any other brand or make now, especially the standard HW rubbish, I know people say they are good but I totally disagree.

    As soon as I get a gun they are out and in the bin now.
     

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