SCBA 1st stage question

Crazyduck · 21st February 2008, 14:29

I have been working on a SCBA first stage and have run into a bit of a problem.

This first stage yoke connection and nut came apart like a dream.
Most scuba regulators have a cir clip or nut holding the sinter filter in place. Well, this particular unit was jammed in place and you could see how it was not leveled before pressing into the base.

So my question is- with most SCBA 1st stages are the filters press fit and any guess how thick?
Again most Scuba first stage filters are 1/8” thick unless it’s a cone.

I am thinking of drilling a small hole and then running in a deck screw to then lift out the jammed in filter. The other option is to Gorilla glue and gluing the top of screw to the surface to pull it out.
My concern is there is potentially a hex key fitting under the filter that holds the internals in place. I do not want to destroy that.

Side note- this 1st stage will not be used again- it’s for a photo break down, and my personal documentation. Also I am a certified for regulator technician and general tank monkey.

Thanks ahead of time.
Regards, Andrew

DanFountain · 21st February 2008, 14:47

What kind of SCBA?

The ones used on BioPak 60 & 240 have a sintered filter that appears to be pressed into the small nipple that fits into the hole in the oxygen valve. Never tried to remove it. If I had to remove it, I'd probably try disassembling the reg and driving it out from the inside - can't recall if the hole is big enough for a pin punch, though.

-Dan

Gobfish1 · 21st February 2008, 15:05

if it’s not a cone. i would drill a hole in the middle ,, small one,
the hex key fitting under the filter has a hole as well so you should be ok ,,

ps

im not a certified regulator technician what make is the reg ,

Crazyduck · 21st February 2008, 15:08

Model is a Biopak 45

The single hose connection is at an 90 angle- so no punch.

The hose connetion was single drilled hole and then threaded.
You can tell by the threading at the end of the hole.

Thanks, Andrew

21st February 2008, 14:29	#1 (permalink)
Crazyduck Underwater Mechanic Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: Mar 2005 Location: TEXAS, Dallas/ Ft.Worth Posts: 720	SCBA 1st stage question I have been working on a SCBA first stage and have run into a bit of a problem. This first stage yoke connection and nut came apart like a dream. Most scuba regulators have a cir clip or nut holding the sinter filter in place. Well, this particular unit was jammed in place and you could see how it was not leveled before pressing into the base. So my question is- with most SCBA 1st stages are the filters press fit and any guess how thick? Again most Scuba first stage filters are 1/8” thick unless it’s a cone. I am thinking of drilling a small hole and then running in a deck screw to then lift out the jammed in filter. The other option is to Gorilla glue and gluing the top of screw to the surface to pull it out. My concern is there is potentially a hex key fitting under the filter that holds the internals in place. I do not want to destroy that. Side note- this 1st stage will not be used again- it’s for a photo break down, and my personal documentation. Also I am a certified for regulator technician and general tank monkey. Thanks ahead of time. Regards, Andrew __________________ Howdy Senor- What’s Happening! Rob Davie April 2005- Presently in a state of transition from Open Circuit to Closed Circuit. "You will not be punished for your anger; you will be punished by it." - Buddha. Last edited by Crazyduck : 21st February 2008 at 14:44. Reason: SpEling
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21st February 2008, 14:47	#2 (permalink)
DanFountain This is my custom title! Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Dec 2005 Location: Lake Superior Posts: 113	Re: SCBA 1st stage question What kind of SCBA? The ones used on BioPak 60 & 240 have a sintered filter that appears to be pressed into the small nipple that fits into the hole in the oxygen valve. Never tried to remove it. If I had to remove it, I'd probably try disassembling the reg and driving it out from the inside - can't recall if the hole is big enough for a pin punch, though. -Dan __________________ Try not. Do - or do not. There is no try. -Yoda Last edited by DanFountain : 21st February 2008 at 16:01. Reason: I don't know as much as I type...
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21st February 2008, 15:05	#3 (permalink)
Gobfish1 RBW Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Join Date: Apr 2005 Location: Manchester UK Posts: 400	Re: SCBA 1st stage question if it’s not a cone. i would drill a hole in the middle ,, small one, the hex key fitting under the filter has a hole as well so you should be ok ,, ps im not a certified regulator technician what make is the reg , __________________ Steve G Apparently not the only gay diver in the village http://drinkingliberally.org/blogs/o...nzee-glock.gif http://www.scubatunes.com/audio/vol01/mp3/HiTech.mp3 Last edited by Gobfish1 : 21st February 2008 at 15:08.
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21st February 2008, 15:08	#4 (permalink)
Crazyduck Underwater Mechanic Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: Mar 2005 Location: TEXAS, Dallas/ Ft.Worth Posts: 720	Re: SCBA 1st stage question Model is a Biopak 45 The single hose connection is at an 90 angle- so no punch. The hose connetion was single drilled hole and then threaded. You can tell by the threading at the end of the hole. Thanks, Andrew __________________ Howdy Senor- What’s Happening! Rob Davie April 2005- Presently in a state of transition from Open Circuit to Closed Circuit. "You will not be punished for your anger; you will be punished by it." - Buddha.
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