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Zbroia Kozak

Discussion in 'Airgun Reviews' started by Simonsays, Feb 22, 2018.

  1. billy.whizz

    billy.whizz Posting Addict

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    Glb, thanks for that , did you contact zbroia direct or through the rfd you brought it from ?. if it was zbroia direct , how did you go about asking them too send you a new one please?
     
  2. GLB

    GLB Busy Member

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    I contacted zbroia by email, address is on their web page and they got the uk importer to contact me and we went from there. I explained I lived quite far from the dealer and they sent me a new reg and a set or cylinder seals. Soon I plan to change reg to a huma or lane.
     
  3. billy.whizz

    billy.whizz Posting Addict

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    Was it easy too change ? ,, was it regale who contacted you? thanks .
     
  4. GLB

    GLB Busy Member

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    yes easy unscrew cylinder, let out air by pushing long valve pin to the sid, unscrew both, take out spacer at reg end, push out reg with suitable length of wood, grease new reg seals and fit all back in reverse order. Takes about 5 minutes and yes it was Regael.
     
    billy.whizz likes this.
  5. billy.whizz

    billy.whizz Posting Addict

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    Glb, many thanks for the info your a star, I think I will mail zbroia and tell them what has happened and see what they say.
     
  6. GLB

    GLB Busy Member

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    you'll probably be contacted by Chris at technical support, nice guy and very helpful. took about an hour from sending email to getting a reply
     
  7. Bozz

    Bozz Busy Member

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    Hi there did you say you got it from BigDans, I only ask because I think he is following some instructions to stop regulator problems. If so you might need to give him a ring.
    Graham
     
    billy.whizz likes this.
  8. GLB

    GLB Busy Member

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    Yes bigdans but my first reg had a badly damaged seal inside so no messing with 300 bar for a while would fix it. The replacement reg is much better
     
  9. Simonsays

    Simonsays Donator

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    Another little update:

    I’ve suspected a bit of reg creep and decided to check it out t’other day. First shot through the chrono came back “bad” which wasn’t helpful. Next come back we’ll low around 9ftlbs. And the next and next etc. WTF?

    A quick think and I decided to check hammer spring and found the hammer spring en cap grub screw loose. So the preload had steadily unwound. Now all reset and back to normal!

    My fault I’m sure for not having nipped up the grub screw since the last tweak.

    Now back to the reg creep!
     
    Artie and billy.whizz like this.
  10. billy.whizz

    billy.whizz Posting Addict

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    im sorry for your problems, there is hope in sight though, don't give up Richierich and myself are working on something at the moment , keep watching maybe some news very soon.:)
     
    Artie, .H. and Simonsays like this.
  11. Simonsays

    Simonsays Donator

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    No big deal, sorted in 5 mins. Looking forward to seeing whatever you’re up to.
     
  12. RichieRich

    RichieRich Ping!

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    Collectively, myself and @billy.whizz think we know the reason for the reg creep. I took my standard reg apart to service it in the hope that it may be of use to someone when i replaced it with a Huma.

    It's all related to how we've been told it needs to sit for a week at 300 bar to "settle" the reg. I have made a slight modification to the standard reg, and Billy will hopefully be testing it this week to see if it resolves the creep problem.

    All will be revealed once testing concludes, and I have plenty pictures to create a write-up of the findings, in the hope it should provide others with a solution and a cure.
     
    Howlin Wolf, Artie, .H. and 2 others like this.
  13. Simonsays

    Simonsays Donator

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    Good work team. Very interested to see how this pans out.
     
  14. El Caro

    El Caro Keyboard Hero

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    I have it from someone who knows about these things:) that the problem with this type of one way valve between high and low pressure is with its design. Too hard a material has no "memory" and wont seal consistently and too soft will deform. Unfortunately there is no ideal material if this design is kept.
    The bleed valve on a dive bottle is not under constant pressure and have you inspected yours recently:eek::D
     
  15. billy.whizz

    billy.whizz Posting Addict

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    this view of the reg and its material has now been supported by Richierich in his findings on a different thread on here. A plastic!!! bolt which is supposed too seal against a brass concave tube end ( not a hope).
     
    RichieRich likes this.
  16. Nexxo

    Nexxo Newbie

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    Hello everyone, a pleasure in greeting them, my name is Luis, I am new to this world of pcp, only this week I get my Kozak 550 in 5.5, I am very happy to enter this forum, I hope in the future contribute with my experiences.
     
    2506sendero, Wing-span and GLB like this.

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