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Tbt Kit Fitted And Fettle On My Hw99s

Discussion in 'Anything Airgun Related' started by Van Pelt, Jul 15, 2020.

  1. Van Pelt

    Van Pelt Engaging Member

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    Since getting this rifle i have nothing but good things to say about it and while it was superb straight out of the box i figured it wouldn't hurt to fit a TBT kit and give it a home fettle to ensure longevity and trouble free use.

    While i had not noticed and of the infamous galling problem i did notice that once apart there was a couple of points where the cocking lever knuckle became a little tight. No marks where evident on either the inner or outer of the cylinder and all that was left to do was free up the knuckle in the tight spots.

    I worked the cocking lever back and forth after gently prising the joint/pushing the lever side to side etc while working some TBT Bumslide and 3 in 1 oil into the joints pressed in pin.
    20 Minutes later i had a nice uniform smooth action.

    The cocking arm foot was smooth so all that was left to do was knock out the pin joint for the delrin strip and remove the spring under the strip then refit the pin and delrin strip.

    Although no burrs were found anywhere i did notice some slight scoring on the front edge of the piston ( possibly caused by manufacturing swarf ). I sanded out the scores and polished the piston with Autosol. Then it was just a case of degrease/regrease , polish the spring and refit.

    I was going to work through the trigger but as the sears were smooth already i just put a dab of Bumslide on the mating surfaces.

    The rifle was great to begin with however i do feel a noticeable improvement has been made. Best of all is that i have worked out some of the minor flaws that could have become problematic. All that's left to do know is to get it on the chrono

    Big shout out goes to Mikey hall for some great tips with fettling the 99 and Nick at TBT for his help, advice and amazing customer support. Thanks guys :thumb:

    Before and after.

    IMG_20200715_152600101.jpg IMG_20200715_134359985.jpg
     
    Last edited: Jul 15, 2020
    talent, PhatMan, Hans Free and 6 others like this.
  2. mikeyhall1

    mikeyhall1 Amazing Poster

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    You’re welcome mate.

    Glad to hear you’ve enjoyed the journey and I hope you continue to have many thousands of pellets of fun
     
    talent, foxtrott and Van Pelt like this.
  3. Chouchin66

    Chouchin66 Very Active

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    Shinin' like a Diamond in a goat's arse...

    .
     
    willo1962 and Van Pelt like this.
  4. Van Pelt

    Van Pelt Engaging Member

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    Cheers mate, it was a fettlers dream....nice peaceful day in the garage with a pot of grease and ocd :D
     
    mikeyhall1, willo1962 and Chouchin66 like this.
  5. Air arms boy

    Air arms boy Wear sunscreen!

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    if not stripping trigger down for polishing ect I’d of at least soaked it in degreaser or brake cleaner for 15-20mins then blown out with air let dry and apply some thin machine oil to the innards Not moly :thumb:
     
    willo1962 and Van Pelt like this.
  6. Chouchin66

    Chouchin66 Very Active

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    Chain lube works good too(Krytec)

    .
     
  7. Van Pelt

    Van Pelt Engaging Member

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    Thanks for the tip, i gave it a blow out with compressed air. Any reason why you would not use a light application of moly? I don't know if your familiar with bumslide. It has more of a soft graphite feel to it.

    The trigger sears did not require polishing as what was visible was smooth and blemish free
     
  8. Air arms boy

    Air arms boy Wear sunscreen!

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    You will be very surprised at what a little polishing can do especially the sides of the sears;)
    I only use rocol moly (the best) but not on a trigger as want it light with no drag whatsoever :)
     
    Van Pelt likes this.
  9. Gaz2121

    Gaz2121 Gazza

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    I did what you did and ended up with a superb little gun . I did treat myself to a CS stock and now it’s a keeper.

    Enjoy your gun and your shooting .
     
    Van Pelt likes this.
  10. Wild Bill

    Wild Bill co2 Enthusiast, HW97, K98 owner

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    Sounds like that is going to be a cracker. Nice one. :up:
     
    Van Pelt likes this.
  11. rabbitwrecker

    rabbitwrecker Black Latex Matters...

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    Now get out there and put some lead through her... :thumb:
     
    Van Pelt likes this.
  12. mikeyhall1

    mikeyhall1 Amazing Poster

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    Polishing the sears will absolutely make a difference but if it feels good now then my advice is to crack on and just enjoy it.

    For what it’s worth after stripping, degreasing and polishing... I use a synthetic gun oil (the Birchwood one) to give smear over all sears, rollers, pins and springs and then a standard moly (such as Abbey or Bisley) on the sear contact points - and a slight dab at that.

    Bum Slide is excellent but more suited for minimal tolerance sliding points such as the piston. On sears you might feel, or even hear the graphite crunching in the sears.

    It’s no biggy, and fine and safe of course.
     
    Van Pelt likes this.
  13. td_boy

    td_boy Donator

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    Interesting thought, but in my book the high pressure sliding load on a sear would be much more suited to a grease than an oil.
    In theory the trigger pull should be lighter with grease as the two faces will slide on the lubricant film rather than being squeezed out as an oil would soon be.
     
  14. Van Pelt

    Van Pelt Engaging Member

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    I agree, the trigger feels as good as my s400 and that's plenty good enough for me. Thanks to all for the tips though :thumb:
     
    mikeyhall1 likes this.

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