Huben K1 Exploded drawings and Spare part list

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The hole that 2# part screwed in, is for building the channel for air, which will push magazine index assist pin, finally get the rotation of magazine

Thanks for your reply. From the diagram, the end of screw #2 inside the action is not resting on anything so it seems to me that the screw is just there to plug up the hole to stop the air inside the action from escaping via that point. Is this what you meant by "building the channel for air" ? If the screw is removed, I believe the only thing happen is degassing of the action hence disabling firing or actuation of the magazine. If the screw is removed for long enough, the air tube will ultimately be degassed as well. May I know if this understanding is correct ?
 
The hole that 2# part screwed in, is for building the channel for air, which will push magazine index assist pin, finally get the rotation of magazine

Thanks for your reply. From the diagram, the end of the screw #2 inside the action is not resting on anything so it seems to me that the screw is just there to plug up the hole to stop the air inside the action from escaping via that point. Is this what you meant by "building the channel for air" ? If the screw is removed, I believe the only thing happen is degassing of the action hence disabling firing or actuation of the magazine. If the screw is removed for long enough, the air tube will ultimately be degassed as well. May I know if this understanding is correct ?

That's right - this screw will degas the entire gun - air cylinder, reg chamber and action if left open long enough. I have done this and the whole gun is degassed. Funny you ask though as I learnt this off you 😏 https://www.airgunnation.com/topic/what-are-these-screws-on-huben-k1-block/#post-490286
 
From who might one obtain the Front assembly that is offered with a gauge to tell the cylinder pressure?

Easy peasy....this guy https://krazcool.com/

No "front assembly " really......It's just the gauge/new fill port .....the longest part involved was depressurizing the gun...(reg and main)...the reg is easy...the main tube takes a bit of time because you want the escape nice and slow (freezing, then shrinking seals is the concern there).....

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DJ
 
@ Hubenairgun, thanks for the explanation. Thats an interesting way to degas the gun. I have another question if you dont mind. I have recently taken my Huben K1 ( version 2 ) apart and found that all locations accommodating O rings are coated with rubbery, red-colored stuff. I believe its silicon sealant or similar material for ensuring good seal. Can you let me know what exactly it is ?