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Help With Tbt Hw99s

Discussion in 'Anything Airgun Related' started by AndyGFitness, Jul 2, 2019.

  1. AndyGFitness

    AndyGFitness Measure twice ... still fXck it up

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    I have stripped the rifle and removed the spring from the piston .

    I removed 2 preload washers

    I then placed the new guides inside the piston but it’s sitting very high

    Have I missed some washers ? Or do I need to cut the guides , if so which guide do I take it off ( long or short)

    Thank you
     
  2. john79

    john79 sywell ft club

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    how much is it sticking out by?
     
    AndyGFitness likes this.
  3. AndyGFitness

    AndyGFitness Measure twice ... still fXck it up

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  4. john79

    john79 sywell ft club

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    Give Nick tbt a ring mate :thumb: I spoke to him this morning hes very helpful
     
  5. monsta41

    monsta41 Donator

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  6. john79

    john79 sywell ft club

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    id take the length from the rear spring guide , does the spring fit on the guide ok ?
     
  7. AndyGFitness

    AndyGFitness Measure twice ... still fXck it up

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    The guides are extremely tight to the spring tbh , I don’t want it to look like I’m speaking bad about tbt but the spring goes on about 15mm then I’m having to force it on
     
    john79 likes this.
  8. john79

    john79 sywell ft club

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    don't do anything else until you have spoken to Nick !
     
    AndyGFitness likes this.
  9. AndyGFitness

    AndyGFitness Measure twice ... still fXck it up

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  10. AndyGFitness

    AndyGFitness Measure twice ... still fXck it up

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    Il tidy it away for now and wait for nick , thanks for the advice
     
    john79 likes this.
  11. mikeyhall1

    mikeyhall1 BRIT SEALS - M & M Products - TbT

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    Firstly make sure that any metal piston weights (washers) that slide inside the piston are removed, not to be used now.

    Then insert the bearing washer in to the piston - the slimmest that’s in the kit.

    Then insert the top hat.

    Then insert the main guide, the top of the main guide needs to sit flush with the back of the piston.

    If the main guide is too long, and simetimes is, removed it and cut away the amount required from the slim end, and then finish it off with the sand paper that’s supplied in the kit - that’s what it’s there for ;)
     
  12. shergar

    shergar Big Poster

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    The top hat and guide need fitting to the piston or gun won't cock. Make sure no existing washers remain in piston, could be retained by o ring.
    Top hat can be shortened provided it goes past two coils. If spring tight on guide lever off, pulling a spring off tight guide makes it grip harder.
     
  13. Neil Curtis

    Neil Curtis Engaging Member

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    My .22 had no washers at all. It was as yours is so i took the over lenght off the rear guide. No two springs are the same so that's where the sand paper comes in. Slowly reduce the guide diameter until it just snug. Nick will chime in I'm sure if you're stuck.
     
  14. shauny

    shauny Top Poster

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    its not the right guide and tophat for a 99. both tophat and guide far too long.
    the guide should sit on the back of the piston.the oa length of a 99 guide should
    only be 85mm with a tophat oa length of 15. this will leave a small gap between
    guide and tophat.also guide should push into the piston with a gentle push.shouldnt
    have to force it.
     
  15. Air arms boy

    Air arms boy Wear sunscreen!

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    what Pepe said BOOOOM.
     
  16. shauny

    shauny Top Poster

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    guides shouldnt be too long if they are made for a specific gun.o_O
     
    foxtrott and AndyGFitness like this.
  17. AndyGFitness

    AndyGFitness Measure twice ... still fXck it up

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    I think I might of been sent the wrong kit , I’m going to give nick a call tomorrow, no harm done
     
    john79 likes this.
  18. shauny

    shauny Top Poster

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    yep prob a 95 kit. :up:
     
    foxtrott likes this.
  19. SeanE

    SeanE Has it gone yet ?!?!

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    Mine was the same. I took some off the guide and top hat until it went in flush. All the guides I have ever had have been tight I snapped one once pulling it out. Shoots great now no issues
     
  20. shauny

    shauny Top Poster

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    guides shouldnt be that tight.should be able to push into spring with fairly little force.
     
    MarcShaw, Blackmax and AndyGFitness like this.

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