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Thread: HW100 'O' rings.

  1. #1
    Join Date
    Oct 2006
    Location
    Leek Staffordshire
    Posts
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    HW100 'O' rings.

    A search on the web came up with this list of 'O' rings for the Weihrauch HW100, but which rings are suitable for the fill probe?

    Here's the full list of factory O-rings and the two recommended alternatives (bolded)

    O-ring HW 100, 37.1 x 1.6 Cylinder clamp 2682C
    O-ring HW 100, 15.6 x 2.5 Barrel clamp 2682B
    O-ring HW 100, 32 x 2 Magazine 2603A*
    O-ring HW 100, 13 x 2 Adaptor A 2704
    O-ring HW 100, 2.57 x 1.78 Adaptor B 2703B

    O-ring HW 100, 3 x 1.5 Valve stem 2655D
    O-ring HW 100, 12 x 1.2 Breech block main (12 x 1) recommended 2658
    O-ring HW 100, 5.5 x 1 Breech/probe seal .22 2659A*
    O-ring HW 100, 4.5 x 1 Breech/probe seal .177 2659A*
    O-ring HW 100, 4 x 1.5 Probe buffer 2618A*
    O-ring HW 100, 2.57 x 1.78 Main valve inlet 2665D
    O-ring HW 100, 7 x 1.5 Main valve outlet 2666
    O-ring HW 100, 2 x 2 Main valve internal (2.57 x 1.78) recommended N/A
    O-ring HW 100, 7 x 1.5 Regulator piston 2668
    O-ring HW 100, 10 x 1.5 Tension adjuster (sometimes omitted) 2672
    O-ring HW 100, 8 x 1.5 Barrel 2679

    Don't waste money on others "seal kits" Source them yourself. You can buy a lifetimes supply for £10 - £15 and in the right sizes 8) Try your local hydraulics shop for the common imperial sizes #005 + #009 or look online. Be aware, there is nothing to be gained from using harder O-rings than the std 70shore, in fact if O-rings are too hard they may not deform sufficiently to seal.
    Last edited by Hawkstone; 12-09-2010 at 07:04 PM.

  2. #2
    Join Date
    Oct 2004
    Location
    Norwich
    Posts
    493
    Don't bother looking any futher than http://simplybearings.co.uk/shop/o_rings.php.
    You can buy small numbers and postage is only £1.50.
    Great service when I used them.
    sj

  3. #3
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    Oct 2006
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    Leek Staffordshire
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    Thanks for that, but what size O rings are required for the fill probe on the HW100?

  4. #4
    Join Date
    Mar 2005
    Location
    Truro, Cornwall
    Posts
    503
    BS005
    2.57 x 1.78
    Regards, Kevin -

    Cornwall Airgunners Club.

  5. #5
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    Oct 2006
    Location
    Leek Staffordshire
    Posts
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    Thumbs up

    Thanks for that

  6. #6
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    Nov 2006
    Location
    Wimbledon.
    Posts
    3,865
    Excellent and useful post. Thank you

  7. #7
    Join Date
    Feb 2009
    Location
    Ely
    Posts
    46

    HW100 cylinder probe o-ring from breach block

    Dear all,

    Could I just confirm which o-ring is the correct size to replace the oring on the probe that enters the cylinder from the breach block.

    Regards

    Stu

  8. #8
    Join Date
    May 2009
    Location
    sheffield
    Posts
    359
    cracking post buddy

  9. #9
    Join Date
    Feb 2003
    Location
    Neston, Cheshire
    Posts
    761
    Quote Originally Posted by Kangastu View Post
    Dear all,

    Could I just confirm which o-ring is the correct size to replace the oring on the probe that enters the cylinder from the breach block.

    Regards

    Stu
    O-ring HW 100, 2.57 x 1.78 Main valve inlet 2665D

    This one mate, thinks its BS005

  10. #10
    Join Date
    Sep 2014
    Location
    tonypandy
    Posts
    21

    Magazine o ring

    Are the o ring on the loading magazine different sizes for different calibres, I have a 177 and a. 20 but the. 20 damages the o ring, I've been told they are but can't find any lnformation.

  11. #11
    Join Date
    Feb 2015
    Location
    Norfolk
    Posts
    985
    BS008, you guys are looking at the wrong area of the gun.

  12. #12
    Join Date
    May 2013
    Location
    abingdon
    Posts
    1,670
    Quote Originally Posted by Hawkstone View Post
    A search on the web came up with this list of 'O' rings for the Weihrauch HW100, but which rings are suitable for the fill probe?

    Here's the full list of factory O-rings and the two recommended alternatives (bolded)

    O-ring HW 100, 37.1 x 1.6 Cylinder clamp 2682C
    O-ring HW 100, 15.6 x 2.5 Barrel clamp 2682B
    O-ring HW 100, 32 x 2 Magazine 2603A*
    O-ring HW 100, 13 x 2 Adaptor A 2704
    O-ring HW 100, 2.57 x 1.78 Adaptor B 2703B

    O-ring HW 100, 3 x 1.5 Valve stem 2655D
    O-ring HW 100, 12 x 1.2 Breech block main (12 x 1) recommended 2658
    O-ring HW 100, 5.5 x 1 Breech/probe seal .22 2659A*
    O-ring HW 100, 4.5 x 1 Breech/probe seal .177 2659A*
    O-ring HW 100, 4 x 1.5 Probe buffer 2618A*
    O-ring HW 100, 2.57 x 1.78 Main valve inlet 2665D
    O-ring HW 100, 7 x 1.5 Main valve outlet 2666
    O-ring HW 100, 2 x 2 Main valve internal (2.57 x 1.78) recommended N/A
    O-ring HW 100, 7 x 1.5 Regulator piston 2668
    O-ring HW 100, 10 x 1.5 Tension adjuster (sometimes omitted) 2672
    O-ring HW 100, 8 x 1.5 Barrel 2679

    Don't waste money on others "seal kits" Source them yourself. You can buy a lifetimes supply for £10 - £15 and in the right sizes 8) Try your local hydraulics shop for the common imperial sizes #005 + #009 or look online. Be aware, there is nothing to be gained from using harder O-rings than the std 70shore, in fact if O-rings are too hard they may not deform sufficiently to seal.
    Where can I buy seal number 2704 ?

  13. #13
    Join Date
    Sep 2020
    Location
    coventry
    Posts
    73
    Quote Originally Posted by oldboyshooter View Post
    Where can I buy seal number 2704 ?
    All of those available on the bay. i have found one pack of 5 for £1.90.
    just do a quick search .

  14. #14
    Join Date
    May 2013
    Location
    abingdon
    Posts
    1,670
    Quote Originally Posted by TVRGREG View Post
    All of those available on the bay. i have found one pack of 5 for £1.90.
    just do a quick search .
    Hello, thanks, can you send a link to those seals

  15. #15
    Join Date
    Dec 2016
    Location
    leeds
    Posts
    2,099
    Quote Originally Posted by TVRGREG View Post
    All of those available on the bay. i have found one pack of 5 for £1.90.
    just do a quick search .
    a bit dear really but then your paying more in post and evilbay fees so go to a hydraulics place and on should only be about 10p max as nbr 70 is cheap enough
    if your replacing the bs005 get one from hw100 tuning as anything less than a pu90 seal will not last that long ,one of the reasons i don't do kits for the hw100 is that Steve does them

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