IDA-76 Counterlung Question

Captain Calamity · 20th July 2008, 12:00

Whilst I wait for the ЯЕАРЕЯ to arrive from dshop2005 i've been getting ready for the simple changes outlined in my last post.

I have a 1.5 litre O2 cylinder ready to go, and I hope to connect this direct to the ADV. I plan to leave the original rig intact, so I will replace the existing hose from the O2 cascade to the ADV with one from my Mk25 to the ADV (1/4" BSP IIRC).

From the diagram in the manual it appears the connection to the ADV is internal, so at some point the MP hose must enter the counterlung. I cannot work out how the counterlung seals around the hose, and would be grateful for any information/photos so that I can order the necessary parts to replace the original hose.

CC

**Dave Sutton** · 20th July 2008, 13:01

Quote: (Originally Posted by Captain Calamity)

Whilst I wait for the ЯЕАРЕЯ to arrive from dshop2005 i've been getting ready for the simple changes outlined in my last post.

I have a 1.5 litre O2 cylinder ready to go, and I hope to connect this direct to the ADV. I plan to leave the original rig intact, so I will replace the existing hose from the O2 cascade to the ADV with one from my Mk25 to the ADV (1/4" BSP IIRC).

From the diagram in the manual it appears the connection to the ADV is internal, so at some point the MP hose must enter the counterlung. I cannot work out how the counterlung seals around the hose, and would be grateful for any information/photos so that I can order the necessary parts to replace the original hose.

CC

Just cut the original hose off at the fitting, and use a barb-fitting and Oetger crimp to add the fitting of choice there and use it. It'll be obvious when you have it in hand. You can add a 3/8-24 fitting with ease (cut one off an old BC inflator hose) and have the hose then fit any standard first stage. Piece of cake.

Dave

.

Captain Calamity · 21st July 2008, 13:34

Quote: (Originally Posted by Dave Sutton)

Just cut the original hose off at the fitting, and use a barb-fitting and Oetger crimp to add the fitting of choice there and use it. It'll be obvious when you have it in hand. You can add a 3/8-24 fitting with ease (cut one off an old BC inflator hose) and have the hose then fit any standard first stage. Piece of cake.

Thanks.

OK. Presumably there's a swagelock barb to 3/8-24 fitting to do the job, if you have a part number that would be nice, as I spent the best part of an hour searching last night to no avail.

I did see this fitting (A0500 towards the bottom of the hoses page) but it seems a lot of money and I wasn't sure if it would fit the existing IDA hose.

As regards the BC hose, I've never had to take one apart - mine appears to be crimped onto the outside of the hose - surely I don't just prize the crimp free and re-use it?

CC

David Pye · 21st July 2008, 14:59

Quote: (Originally Posted by Captain Calamity)

Thanks.

OK. Presumably there's a swagelock barb to 3/8-24 fitting to do the job, if you have a part number that would be nice, as I spent the best part of an hour searching last night to no avail.

I did see this fitting (A0500 towards the bottom of the hoses page) but it seems a lot of money and I wasn't sure if it would fit the existing IDA hose.

As regards the BC hose, I've never had to take one apart - mine appears to be crimped onto the outside of the hose - surely I don't just prize the crimp free and re-use it?

CC

Surely what Dave means is to chop the end that plugs into the inflator off and chuck it in the bin, then use a crimp fitting to secure the hose end to the barbed fitting. That way you can connect the OTHER end to any first stage of your choice.

HTH!

David

**Dave Sutton** · 21st July 2008, 15:14

Quote: (Originally Posted by Captain Calamity)

Thanks.

OK. Presumably there's a swagelock barb to 3/8-24 fitting to do the job, if you have a part number that would be nice, as I spent the best part of an hour searching last night to no avail.

Swagelok? Naah..... Think outside the box, man!

. Dave Pye has it right. Hack Away!

All you do is to take any old BC hose, put the end in a vise, cut off the (chromed brass) swaged-ferrule, and extract the fitting for re-use. Stick it into the hose and use an ear-crimp to secure it. I'll send a handful of crimps if needed. Takes a few minutes.

To cut the ferrule off, cut diagonally with a saw, starting at the hose end and work towards the fitting. Rotate the fitting in the vise a few times to keep access to the cut as you go. Rip the ferrule off with pliers after it's about 90% cut thru. The ferrules are VERY thin and cut like butter with a sharp saw.

Dave

.

Captain Calamity · 21st July 2008, 19:35

Thankyou. I did wonder if there was a barb in there, but didn't want to wreck the hose until I was sure. I'll get onto it.

CC

**Dave Sutton** · 21st July 2008, 21:51

Quote: (Originally Posted by Captain Calamity)

Thankyou. I did wonder if there was a barb in there, but didn't want to wreck the hose until I was sure. I'll get onto it.

CC

They are definately barb fittings.
Once the ferrule is gone you'll need to slice the hose with a knife to remove the fitting.

Dave

Captain Calamity · 22nd July 2008, 00:04

Quote: (Originally Posted by Dave Sutton)

All you do is to take any old BC hose, put the end in a vise, cut off the (chromed brass) swaged-ferrule, and extract the fitting for re-use. Stick it into the hose and use an ear-crimp to secure it. I'll send a handful of crimps if needed. Takes a few minutes.

To cut the ferrule off, cut diagonally with a saw, starting at the hose end and work towards the fitting. Rotate the fitting in the vise a few times to keep access to the cut as you go. Rip the ferrule off with pliers after it's about 90% cut thru. The ferrules are VERY thin and cut like butter with a sharp saw.

Job done. Have some green, thanks.

CC

20th July 2008, 12:00	#1 (permalink)
Captain Calamity New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Mar 2007 Location: UK Posts: 10	IDA-76 Counterlung Question Whilst I wait for the ЯЕАРЕЯ to arrive from dshop2005 i've been getting ready for the simple changes outlined in my last post. I have a 1.5 litre O2 cylinder ready to go, and I hope to connect this direct to the ADV. I plan to leave the original rig intact, so I will replace the existing hose from the O2 cascade to the ADV with one from my Mk25 to the ADV (1/4" BSP IIRC). From the diagram in the manual it appears the connection to the ADV is internal, so at some point the MP hose must enter the counterlung. I cannot work out how the counterlung seals around the hose, and would be grateful for any information/photos so that I can order the necessary parts to replace the original hose. CC Last edited by Captain Calamity : 20th July 2008 at 12:07.
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20th July 2008, 13:01	#2 (permalink)
Dave Sutton Diveshop of Horrors Current Rebreather/s: Sport Kiss MK 15.X rEvo Other CCR Azimuth Home Build Other Rebreather/s: Evolution Megalodon rEvo Other CCR Azimuth Home Build Join Date: Jun 2006 Location: Narragansett, Rhode Island and Hackettstown, New Jersey Posts: 2,907	Re: IDA-76 Counterlung Question Quote: (Originally Posted by Captain Calamity) Whilst I wait for the ЯЕАРЕЯ to arrive from dshop2005 i've been getting ready for the simple changes outlined in my last post. I have a 1.5 litre O2 cylinder ready to go, and I hope to connect this direct to the ADV. I plan to leave the original rig intact, so I will replace the existing hose from the O2 cascade to the ADV with one from my Mk25 to the ADV (1/4" BSP IIRC). From the diagram in the manual it appears the connection to the ADV is internal, so at some point the MP hose must enter the counterlung. I cannot work out how the counterlung seals around the hose, and would be grateful for any information/photos so that I can order the necessary parts to replace the original hose. CC Just cut the original hose off at the fitting, and use a barb-fitting and Oetger crimp to add the fitting of choice there and use it. It'll be obvious when you have it in hand. You can add a 3/8-24 fitting with ease (cut one off an old BC inflator hose) and have the hose then fit any standard first stage. Piece of cake. Dave . __________________ "Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com
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21st July 2008, 13:34	#3 (permalink)
Captain Calamity New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Mar 2007 Location: UK Posts: 10	Re: IDA-76 Counterlung Question Quote: (Originally Posted by Dave Sutton) Just cut the original hose off at the fitting, and use a barb-fitting and Oetger crimp to add the fitting of choice there and use it. It'll be obvious when you have it in hand. You can add a 3/8-24 fitting with ease (cut one off an old BC inflator hose) and have the hose then fit any standard first stage. Piece of cake. Thanks. OK. Presumably there's a swagelock barb to 3/8-24 fitting to do the job, if you have a part number that would be nice, as I spent the best part of an hour searching last night to no avail. I did see this fitting (A0500 towards the bottom of the hoses page) but it seems a lot of money and I wasn't sure if it would fit the existing IDA hose. As regards the BC hose, I've never had to take one apart - mine appears to be crimped onto the outside of the hose - surely I don't just prize the crimp free and re-use it? CC
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21st July 2008, 14:59	#4 (permalink)
David Pye CK#69 Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: May 2006 Location: Newcastle Upon Tyne Posts: 267	Re: IDA-76 Counterlung Question Quote: (Originally Posted by Captain Calamity) Thanks. OK. Presumably there's a swagelock barb to 3/8-24 fitting to do the job, if you have a part number that would be nice, as I spent the best part of an hour searching last night to no avail. I did see this fitting (A0500 towards the bottom of the hoses page) but it seems a lot of money and I wasn't sure if it would fit the existing IDA hose. As regards the BC hose, I've never had to take one apart - mine appears to be crimped onto the outside of the hose - surely I don't just prize the crimp free and re-use it? CC Surely what Dave means is to chop the end that plugs into the inflator off and chuck it in the bin, then use a crimp fitting to secure the hose end to the barbed fitting. That way you can connect the OTHER end to any first stage of your choice. HTH! David
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21st July 2008, 15:14	#5 (permalink)
Dave Sutton Diveshop of Horrors Current Rebreather/s: Sport Kiss MK 15.X rEvo Other CCR Azimuth Home Build Other Rebreather/s: Evolution Megalodon rEvo Other CCR Azimuth Home Build Join Date: Jun 2006 Location: Narragansett, Rhode Island and Hackettstown, New Jersey Posts: 2,907	Re: IDA-76 Counterlung Question Quote: (Originally Posted by Captain Calamity) Thanks. OK. Presumably there's a swagelock barb to 3/8-24 fitting to do the job, if you have a part number that would be nice, as I spent the best part of an hour searching last night to no avail. Swagelok? Naah..... Think outside the box, man! . Dave Pye has it right. Hack Away! All you do is to take any old BC hose, put the end in a vise, cut off the (chromed brass) swaged-ferrule, and extract the fitting for re-use. Stick it into the hose and use an ear-crimp to secure it. I'll send a handful of crimps if needed. Takes a few minutes. To cut the ferrule off, cut diagonally with a saw, starting at the hose end and work towards the fitting. Rotate the fitting in the vise a few times to keep access to the cut as you go. Rip the ferrule off with pliers after it's about 90% cut thru. The ferrules are VERY thin and cut like butter with a sharp saw. Dave . __________________ "Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com Last edited by Dave Sutton : 21st July 2008 at 15:17.
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21st July 2008, 19:35	#6 (permalink)
Captain Calamity New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Mar 2007 Location: UK Posts: 10	Re: IDA-76 Counterlung Question Thankyou. I did wonder if there was a barb in there, but didn't want to wreck the hose until I was sure. I'll get onto it. CC
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21st July 2008, 21:51	#7 (permalink)
Dave Sutton Diveshop of Horrors Current Rebreather/s: Sport Kiss MK 15.X rEvo Other CCR Azimuth Home Build Other Rebreather/s: Evolution Megalodon rEvo Other CCR Azimuth Home Build Join Date: Jun 2006 Location: Narragansett, Rhode Island and Hackettstown, New Jersey Posts: 2,907	Re: IDA-76 Counterlung Question Quote: (Originally Posted by Captain Calamity) Thankyou. I did wonder if there was a barb in there, but didn't want to wreck the hose until I was sure. I'll get onto it. CC They are definately barb fittings. Once the ferrule is gone you'll need to slice the hose with a knife to remove the fitting. Dave __________________ "Silent Diving with No Bubbles and No Politics".... www.nobubblediving.com
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22nd July 2008, 00:04	#8 (permalink)
Captain Calamity New Member Current Rebreather/s: Home Build Other Rebreather/s: Home Build Join Date: Mar 2007 Location: UK Posts: 10	Re: IDA-76 Counterlung Question Quote: (Originally Posted by Dave Sutton) All you do is to take any old BC hose, put the end in a vise, cut off the (chromed brass) swaged-ferrule, and extract the fitting for re-use. Stick it into the hose and use an ear-crimp to secure it. I'll send a handful of crimps if needed. Takes a few minutes. To cut the ferrule off, cut diagonally with a saw, starting at the hose end and work towards the fitting. Rotate the fitting in the vise a few times to keep access to the cut as you go. Rip the ferrule off with pliers after it's about 90% cut thru. The ferrules are VERY thin and cut like butter with a sharp saw. Job done. Have some green, thanks. CC
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