Results 1 to 6 of 6

Thread: Hw35 help

  1. #1
    Join Date
    Jun 2011
    Location
    Hatfield Broad Oak, Essex/Herts CM22
    Posts
    3,597

    Hw35 help

    Hi guys

    Got a hw35 and fitted a v-mach spring and seal, and made my Owen guides up.

    It's nice to cock now with a piston sleeve and a delrin bearing on the cocking arm.

    Only trouble is its got reasonably harsh recoil. It doesn't twang. It's just harsh. Like its hitting something when the pistons released?

    I was wondering if its possibly the piston hitting the cocking shoe/arm? Not had it apart yet but just wondering if anyone has exsperiance of this or can think of anything I can look for?

    It's one that was manufactured with a synthetic seal so don't think it's the transfer port being too big.

    It has got a quick lock time compared to my standard 80 but it feels like a metallic thump rather than a nice dull thump.

    Thanks
    Bruce

  2. #2
    Join Date
    Jun 2011
    Location
    Hatfield Broad Oak, Essex/Herts CM22
    Posts
    3,597
    Forgot to mention, new breach seal also fitted.

  3. #3
    Join Date
    Dec 2003
    Location
    Cambridge UK
    Posts
    2,726
    Any chrono data, before and after?
    How good a fit is the new piston seal?
    Any leak at the breech seal?
    I know you have fitted a new breech seal but it is stil worth eliminating a leak here.
    Is the new spring noticeably stiffer than the old one ... more preload, greater wire diameter?
    Cheers, Phil

  4. #4
    Join Date
    Jul 2009
    Location
    rochdale, LANC`S
    Posts
    1,008
    hi bruce check the size of the transfer port, if it was a origanal leather seal rifle one been converted to a synthetic seal you might have to alter the port size, you might also have a leaky transfer port end [renown on older 35`s] and it letting all the air out of the babbly brazed joint so not cushining the end piston stroke and slamming into the comp tube end, you could do with doing a leak test on the comp tube
    atb john

  5. #5
    Join Date
    Jun 2011
    Location
    Hatfield Broad Oak, Essex/Herts CM22
    Posts
    3,597
    Thanks for the help guys

    It's a 1987 model, so originally synthetic. TP is about 3mm but will get proper figures tomorrow.

    Looking after the kids so can't get up the workshop like I'd planed tonight

    Will update tomorrow.
    Cheers
    B

  6. #6
    Join Date
    Apr 2012
    Location
    Retford, Notts
    Posts
    5,943
    As Phil has said, I think I'd be looking towards the seals....
    1) Breech seal, although new, check.
    2) Piston seal. As above
    3) Cylinder brazing
    4) Oversprung?

    Let's also see what the chrono reveals.......
    The Inaugural Spring Rifle Gathering at T20's. June 15, 2013.
    2014 Boinger Bash, June 7 and 8. Open Airgun Gathering, September 6/7, 2014. Boinger Bonfire Bash Nov 8/9, 2014. 2015 Bash June 6/7.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •