Question Argonaut Kraken secondary leak adjustment

[HJW]

What you are quoting from Fibonacci is a good start.

As he mentions, you will first need an IP gauge to isolate if this a 1st stage issue or a 2nd stage issue.

Can I use my standard gauge I am using some italian brand for technical diving. Not digital, nor for maintenance.

 

[HJW]

Intermediate Pressure (IP) and Cracking Effort (CE) are adjusted by the indicated parts.

I'd caution you that if you don't know what you are doing, please research regulator tuning further before adjusting things....
View attachment 860152


Basic regulator theory remains the same between single hose and double hose regulators, so a reasonably knowledgeable person should be able to adjust/tune your regulator, or if necessary properly service it.

You said your friend left, but maybe he can talk you through it. Video chat might be a great option.

maybe @Luis H or @herman can provide assistance here...

Thank you ery much for this advise.
I do not touch without professional help.
If you know anyone who can support me, would be lovely.

 

[HJW]

A correction: the nut you are calling CE only adjust the lever height, not the cracking effort. The lever height doesn't really affect the cracking effort in this case. The diaphragm in this DH has so much travel that it is recommended to adjust the lever height about 1/8" (3 mm) above the edge of the can. There is no need for the lever to be touching the diaphragm.

The spring 2nd stage force versus the IP is what will affect the cracking effort. Changing the IP is easy, but changing the 2nd stage spring force is a bit more involved.

THX

I measured and verified what you @Luis H wrote:

The diaphragm in this DH has so much travel that it is recommended to adjust the lever height about 1/8" (3 mm) above the edge of the can.

My measurements indicates more than 3 mm - based on my measurement it is between 5,7 mm (including 1,2 mm for the CD i used as a measurement help). Attached two photos where I tried to measure.

=> What shall I do?

 

[HJW]

Other question: the Argonaut Kraken Mouthpiece has this function of closing off at surface etc. by twisting the mouthpiece. This is nealry impossible. Why? I have technically a brand-new Kraken.

However - in my case it is impossible to do this even with brute force. I am aware that there is a screw and I thought this might be an issue related with this screw.
So I dismantled and fit it together. It worked - for a moment. After some minutes and after some hours - again: the same issue.
It seems to be lubricated.

Who can give me an advise?

 

[scrane]

Can I use my standard gauge I am using some italian brand for technical diving. Not digital, nor for maintenance.

You can use any air pressure gauge with the proper precision that you can hook up to your low pressure port . Usually around 15 Bar full scale. A HP gauge will not work.
In my experience the DSV mouthpiece O-rings must be heavily lubed to move smoothly. Especially the rectangular one around the air outlet. The screw is for limiting rotation and does not effect tension.

Just to be sure: the Kraken is free flowing on dry land when hooked up? If so, is it also free flowing with the can split and the diaphragm removed?

 

[Fibonacci]

Other question: the Argonaut Kraken Mouthpiece has this function of closing off at surface etc. by twisting the mouthpiece. This is nealry impossible. Why? I have technically a brand-new Kraken.

However - in my case it is impossible to do this even with brute force. I am aware that there is a screw and I thought this might be an issue related with this screw.
So I dismantled and fit it together. It worked - for a moment. After some minutes and after some hours - again: the same issue.
It seems to be lubricated.

Who can give me an advise?

There is a known issue where the standard 70 Duro (Shore A) o-rings have a tendency to bond to the walls of the DSV in storage despite being well lubricated… happened to my Kraken too!
The fix is to swap out the o-rings for softer 50 Duro ones.
Covered in part here along with exploded diagrams:

VDH DSV Leak by

then we are discussing a DSV issue. Are you sure it was fully open/ closed?

scubaboard.com

 

[Fibonacci]

Can I use my standard gauge I am using some italian brand for technical diving. Not digital, nor for maintenance.

You need one of these…

Compact IP Gauge (PSI and BAR)

A compact intermediate pressure (IP) gauge for SCUBA applications

www.divegearexpress.com

 

[HJW]

There is an known issue where the standard 70 Duro (Shore A) o-rings have a tendency to bond to the walls of the DSV in storage despite being well lubricated… happened to my Kraken too!
The fix is to swap out the o-rings for softer 50 Duro ones.
Covered in part here along with exploded diagrams:

THANK YOU!
can you tell me which diameter and so on.
I live in China, so it is difficult for me to find exactly teh right one.

 

[HJW]

You can use any air pressure gauge with the proper precision that you can hook up to your low pressure port . Usually around 15 Bar full scale. A HP gauge will not work.
In my experience the DSV mouthpiece O-rings must be heavily lubed to move smoothly. Especially the rectangular one around the air outlet. The screw is for limiting rotation and does not effect tension.

Just to be sure: the Kraken is free flowing on dry land when hooked up? If so, is it also free flowing with the can split and the diaphragm removed?

So I cannot use my normal HP prressure gauge. What si the name of the pressure gauge I need to buy?

It is fleeflwoing when it is on the water surface.

 

[Fibonacci]

THANK YOU!
can you tell me which diameter and so on.
I live in China, so it is difficult for me to find exactly teh right one.

AS-568-027 50 Duro
AS-568-028 50 Duro

AS568-027 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring [B50027] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-027 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring [B50027] - 1-5/16"ID X 1-7/16"OD X 1/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. It has a...

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AS568-028 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring [B50028] : The O-Ring Store LLC, We make getting O-Rings easy!

The O-Ring Store LLC AS568-028 B50 (NBR) Buna-N Nitrile 50 Duro O-Ring [B50028] - 1-3/8"ID X 1-1/2"OD X 1/16"CS Buna-N O-Rings 50 Duro (NBR): The most commonly used elastomer for sealing products. Nitrile, also known as Buna-N or NBR, is a copolymer of Butadiene and Acrylonitirle. It has a...

www.theoringstore.com