Page 1 of 3 123 LastLast
Results 1 to 15 of 35

Thread: HW 35 Piston Seal Change

  1. #1
    T 20 is offline Super Moderator and spoonbender
    Join Date
    May 2008
    Location
    Nuneaton
    Posts
    4,393

    HW 35 Piston Seal Change

    I've just read today that Weihrauch made the change from leather to Nylon piston seal on HW35s at serial number 843636 in 1980.




    Just thought I'd post it here for reference.




    All the best Mick

  2. #2
    Join Date
    Feb 2010
    Location
    Radcliffe, Lancashire
    Posts
    1,728
    Thanks for that Mick. Some very relevant info for the HW35 nuts amongst us - me included.
    ATB
    Eric
    Demic, miserable, grumpy old git! Feinwerkbau Sport Appreciation Society.
    I don't mind what sexual, religious or political persuasion you are, just don't impose them on me!!

  3. #3
    I. J. is offline I will stoop lower than a snakes wedding tackle for Relum bits
    Join Date
    Nov 2001
    Location
    Blackburn, Lancs. (under a bridge)
    Posts
    17,025
    Thanks for that.
    'Every day is .'

    ATB
    Ian
    Sec of Rivington Riflemen. Their website: http://www.rivington-riflemen.eu
    My gun collection http://smg.photobucket.com/albums/v485/Airsniper/

  4. #4
    Join Date
    Feb 2011
    Location
    Durlston bay Dorset
    Posts
    1,312
    Quote Originally Posted by T 20 View Post
    I've just read today that Weihrauch made the change from leather to Nylon piston seal on HW35s at serial number 843636 in 1980.




    Just thought I'd post it here for reference.




    All the best Mick
    Please can you let us know where the information was obtained. Cheers

  5. #5
    T 20 is offline Super Moderator and spoonbender
    Join Date
    May 2008
    Location
    Nuneaton
    Posts
    4,393
    Quote Originally Posted by HW55T View Post
    Please can you let us know where the information was obtained. Cheers
    No problem John

    It's from a book I've probably read a thousand times and never noticed the info before.

    http://i1138.photobucket.com/albums/...8012006186.jpg

    And on page 162 under HW35EB we find this.

    http://i1138.photobucket.com/albums/...8012006188.jpg

    I found this by accident when I was trying to find out when the HW77 was introduced.
    Autumn 1983 is the nearest I can find on that one ?



    All the best Mick

  6. #6
    Join Date
    Dec 2006
    Location
    Sutton, Surrey
    Posts
    1,377

    Hw35

    Excellent bit of work Mick. I am off to check my "never been apart 35E" which is from around that period. Mind you whatever seal its got, leather or nylon it does 10.8ftlb to 11ftlbs in .22 with a slightly tired spring.

  7. #7
    T 20 is offline Super Moderator and spoonbender
    Join Date
    May 2008
    Location
    Nuneaton
    Posts
    4,393
    Quote Originally Posted by coburn View Post
    Excellent bit of work Mick. I am off to check my "never been apart 35E" which is from around that period. Mind you whatever seal its got, leather or nylon it does 10.8ftlb to 11ftlbs in .22 with a slightly tired spring.
    If I told you what they'll do with an O ring piston head and spring with no preload you wouldn't believe me.

    No wonder everybody wanted one back in the 1970s.



    All the best Mick

  8. #8
    I. J. is offline I will stoop lower than a snakes wedding tackle for Relum bits
    Join Date
    Nov 2001
    Location
    Blackburn, Lancs. (under a bridge)
    Posts
    17,025
    While we are on the subject of HW35 trivia Dennis Hiller [looks to the east and bows very low] writes - 'Up to serial number 754999 they have 12mm (*) scope groove and from 755000 they have a 9mm groove".

    * I always understood it as 13mm but who am I to argue with God.

    ATB
    Ian
    Sec of Rivington Riflemen. Their website: http://www.rivington-riflemen.eu
    My gun collection http://smg.photobucket.com/albums/v485/Airsniper/

  9. #9
    T 20 is offline Super Moderator and spoonbender
    Join Date
    May 2008
    Location
    Nuneaton
    Posts
    4,393
    Quote Originally Posted by I. J. View Post
    While we are on the subject of HW35 trivia Dennis Hiller [looks to the east and bows very low] writes - 'Up to serial number 754999 they have 12mm (*) scope groove and from 755000 they have a 9mm groove".

    * I always understood it as 13mm but who am I to argue with God.

    ATB
    Ian
    Cheers Ian

    And noted.

    First HW rifle produced: 1951
    5100 Manufactured 1955
    5138 Manufactured 1955
    31151 Manufactured 1955
    44485 Manufactured 1956
    51322 Manufactured 1956
    58446 Manufactured 1957
    72243 manufactured 1959
    76244 Manufactured 1960
    120662 Manufactured 1962
    142447 Manufactured 1964
    149423 Manufactured 1965
    195863 Manufactured 1965
    200000 manufactured 1966
    241065 Manufactured 1966
    395231 Manufactured 1968
    296000 Manufactured 1969
    309345 Manufactured 1969
    322960 Manufactured 1969
    332966 Manufactured 1969
    333015 Manufactured 1969
    333219 Manufactured 1970
    346900 Manufactured 1970
    357053 Manufactured 1970
    373816 Manufactured 1970
    375788 Manufactured 1970
    400000 Manufactured 1972
    401391 Manufactured 1972
    423452 Manufactured 1972
    469655 Manufactured 1973
    480574 Manufactured 1973
    496842 Manufactured 1973
    512990 Manufactured 1974
    583245 Manufactured 1975
    600000 Manufactured 1976
    612502 Manufactured 1976
    613000 Single sided safety introduced ?
    623997 Manufactured 1976
    624554 Manufactured 1976
    670138 Manufactured 1977
    671143 Manufactured 1977
    702045 Manufactured 1979
    741394 Manufactured 1979
    755000 HW35 changes from 12mm to 9mm scope rail
    778058 Manufactured 1980
    785538 Manufactured 1980
    800000 Manufactured 1980
    843636 HW 35 changes from Leather to Nylon Piston seal and double sided safety.
    890268 Manufactured 1980
    902189 Manufactured 1981
    902315 Manufactured 1981
    926011 Manufactured 1983
    1000000 manufactured 1983.
    1000375 manufactured 1983
    1001845 manufactured 1983
    January 1984 MK 1 HW 77 released in UK
    1003486 was delivered in 1984
    1003582 was delivered in 1984
    1003986 manufactured 1984
    1007970 manufactured 1984
    1011026 was delivered in 1984
    1011108 was delivered in 1984
    1016650 was delivered in 1985
    1016823 manufactured 1985
    October 1985 MK2 77 anounced
    1021358 Earliest known MK2 so far
    1023310 manufactured 1985
    1037060 Purchased new 16th July 1985
    1032802 purchased new 1986
    1036521 was delivered in 1987
    1036528 was delivered in 1987
    1041261 was delivered in 1987
    1139541 was delivered in 1988
    1139761 purchased new 1988
    1178259 born 1989
    1181401 was delivered in 1989
    1181555 was delivered in 1989
    1181588 was delivered in 1989
    1182580 manufactured 1990
    1183140 bought new in 1990
    1186081 manufactured 1990
    1188451 was delivered in 1990
    1233526 Manufactured in 1991
    1288125 was delivered in 1993
    1288752 manufactured 1993
    1289991 manufactured 1993
    1302969 manufactured 1993
    1364279 was delivered in 1994
    1370364 produced in 1995
    1446049 HW 77 switch from 25mm to 26mm cylinder
    1459697 was delivered 1998
    1538821 bought new in 2001
    1551576 was delivered in 2001
    1576934 was delivered in 2002
    1616583 produced in 2004
    1687223 was delivered in 2006


    All the best Mick
    Last edited by T 20; 08-08-2012 at 11:45 AM.

  10. #10
    Join Date
    Dec 2006
    Location
    Sutton, Surrey
    Posts
    1,377

    Hw35

    Singled sided safety introduced around 613000 and double sided by 915000 but may have been in the late 800000. Anyone got a double sided safey in the high 800000's? It may have happened at the same time as the switch to nylon washer corresponding to the intro of the HW80.

    Scope rails were 13mm to 11mm, I think Hiller got his dimensions muddled.

  11. #11
    T 20 is offline Super Moderator and spoonbender
    Join Date
    May 2008
    Location
    Nuneaton
    Posts
    4,393
    Quote Originally Posted by coburn View Post
    Singled sided safety introduced around 613000 and double sided by 915000 but may have been in the late 800000. Anyone got a double sided safey in the high 800000's? It may have happened at the same time as the switch to nylon washer corresponding to the intro of the HW80.

    Scope rails were 13mm to 11mm, I think Hiller got his dimensions muddled.
    Hi Coburn

    The safety dates were going to be my next question as I was wondering today whether they coincided with the scope rail change and piston seal change.

    Hillier could have measured the scope rails in the cutout instead of their widest point which would explain the difference in dimensions.


    All the best Mick

  12. #12
    Join Date
    Dec 2006
    Location
    Sutton, Surrey
    Posts
    1,377

    HW35 Dates

    Mike

    I got it slightly wrong in my last post. HW intoduced the safety around serial no 611 to 613000, well before the change to 11mm scope rails. Beeman states the change was made around 76 and his guide of that year shows the "new" safety fitted to a HW35 so ties in with your dates. Shortly after this time the full serial number moved from the trigger block to under the barrel.

    The earliest double sided safety I have seen was an HW35 advertised on Gunmart with a serial number of 851***. So possibly double sided safety and nylon washer introduced at the same time.

    Since HW were using the same trigger block for the new 80 (all of which I've seen have had the double sided safety) it would be fairly reasonable to assume that both these changes happened at the same time? If thats the case then a purchaser of a HW35 should be able to tell at a glance at the trigger block, as to which washer is fitted with final confirmation being the serial number.

    Despite mine and many peoples love of the HW80, the 35 is the better sub 12ftlb (and a bit above in some cases) air rifle.

  13. #13
    I. J. is offline I will stoop lower than a snakes wedding tackle for Relum bits
    Join Date
    Nov 2001
    Location
    Blackburn, Lancs. (under a bridge)
    Posts
    17,025
    Quote Originally Posted by coburn View Post

    ...... the 35 is the better sub 12ftlb (and a bit above in some cases) air rifle.
    Agreed.

    ATB
    Ian
    Sec of Rivington Riflemen. Their website: http://www.rivington-riflemen.eu
    My gun collection http://smg.photobucket.com/albums/v485/Airsniper/

  14. #14
    Join Date
    Feb 2011
    Location
    Derby
    Posts
    335
    I have here HW35E in .177, serial number 751271 with single sided safety and leather piston washer, bought new from Optima Leisure in 1980 or 1981. I believe this ties in with your information.

    atb, Nitro-Express.

  15. #15
    T 20 is offline Super Moderator and spoonbender
    Join Date
    May 2008
    Location
    Nuneaton
    Posts
    4,393
    Quote Originally Posted by coburn View Post
    Mike

    I got it slightly wrong in my last post. HW intoduced the safety around serial no 611 to 613000, well before the change to 11mm scope rails. Beeman states the change was made around 76 and his guide of that year shows the "new" safety fitted to a HW35 so ties in with your dates. Shortly after this time the full serial number moved from the trigger block to under the barrel.

    The earliest double sided safety I have seen was an HW35 advertised on Gunmart with a serial number of 851***. So possibly double sided safety and nylon washer introduced at the same time.

    Since HW were using the same trigger block for the new 80 (all of which I've seen have had the double sided safety) it would be fairly reasonable to assume that both these changes happened at the same time? If thats the case then a purchaser of a HW35 should be able to tell at a glance at the trigger block, as to which washer is fitted with final confirmation being the serial number.

    Despite mine and many peoples love of the HW80, the 35 is the better sub 12ftlb (and a bit above in some cases) air rifle.
    Hi Coburn

    Thanks for the added info and I have penciled in the 613000 to the list.

    Your info on the double sided safety makes perfect sense as well, when Weihrauch fitted the nylon HW80 piston seal to the HW35 then they surely would have used the 80 trigger housing as well to simplify production.

    I still have a few dates to find such as

    Introduction of the 80
    When was the 77 breach opened out
    Introduction of the MK3 77
    Introduction of the 97 MK1, MK2, MK3

    Etc


    Thanks again for the info




    All the best Mick
    Last edited by T 20; 17-03-2011 at 06:26 PM. Reason: 5Pellyn

Posting Permissions

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