Bob Howell ADV

divegyrl · 16th January 2006, 22:43

Hope this is in the correct place.....
I bought a 2nd hand Inspo Classic with a Bob Howell ADV on it, it does not hold negative & I have worked out that the leak is definitely coming from the ADV.

My question is: how do you take the thing apart and check/repair it?
I have searched the internet and can't find anything useful.
Can anyone help?

Many thanks,

***diverklondike*** · 17th January 2006, 02:28

If I remember correctly the top simply screws off exposing the diaphram etc..

From that point on it was pretty straight forward. Was using a bob adv until the AP one came out.

Dive Safe...

Mark

**Steve** · 17th January 2006, 03:26

Am I understanding you correctly? Do AP have an OC/CC DSV?

wizbang · 17th January 2006, 03:45

Quote: (Originally Posted by Steve)

Am I understanding you correctly? Do AP have an OC/CC DSV?

No you are not. NOT OC/DSV (BOV) but ADV.
Bob did both, but he wouldn't return my emails to get a dolphin BOV.

**nigelh** · 17th January 2006, 06:27

Quote: (Originally Posted by divegyrl)

I bought a 2nd hand Inspo Classic with a Bob Howell ADV on it, it does not hold negative & I have worked out that the leak is definitely coming from the ADV.

My question is: how do you take the thing apart and check/repair it?

I have one. It does hold negative but not hugely long. Also doing a negative check is a bit mean to the diaphragm so I only make a simple check.
Do you have a flow stop? That makes it much easier to get a negative. If not you have to drain the DIL first stage.

The top plate unscrews. Under this is the diaphragm. The reg mechanism is a solid lump that is held in by the nut. It just bolts through the wall of the ADV. The works come from an Aqualung LPO (a cheapy slimline octopus reg not actually sold in the UK).

Juz · 17th January 2006, 12:00

Am I right in thinking the part that unscrews is the circular part holding the 'purge' button.

Is it just a matter of 'gripping' the ring with molegrips and turning it.............

Juz

**nigelh** · 17th January 2006, 12:13

Quote: (Originally Posted by Juz)

Am I right in thinking the part that unscrews is the circular part holding the 'purge' button.
Is it just a matter of 'gripping' the ring with molegrips and turning it.............

ARGH!!!!!
It's only a bit of plastic.

How about palm of the hand flat on it and turn on friction.
We are talking about the same thing aren't we?

Juz · 17th January 2006, 12:15

Quote: (Originally Posted by nigelh)

ARGH!!!!!
It's only a bit of plastic.

How about palm of the hand flat on it and turn on friction.
We are talking about the same thing aren't we?

That's the chappie. The part with the 'nike' logo holes is soft an dthe ring around it is hard. It's that ring that I assume needs to turn.

Juz

***jradomski*** · 17th January 2006, 12:18

Quote: (Originally Posted by divegyrl)

Hope this is in the correct place.....
I bought a 2nd hand Inspo Classic with a Bob Howell ADV on it, it does not hold negative & I have worked out that the leak is definitely coming from the ADV.

My question is: how do you take the thing apart and check/repair it?
I have searched the internet and can't find anything useful.
Can anyone help?

Many thanks,

The diaphram cover screws off easily..

You need to determine where the leak is comming from.. put a cutoff on the adv, and see if gas is comming from the first stage.. if not the most likely source is that the diaphram is being stretched a bit too far and its making a gap to where the cover holds it down (into the groove).. (this is the most likely source).. In fact its usually right at the point where the gas valve is installed..

I use this type of adv as well, What I decided to do was to put a bead of silicon sealent around the outside of the diaphram, this seals it to the adv and you can hold a real good negative test regardless of how much of a vacuum you try and pull..

***Beanie*** · 17th January 2006, 12:20

Quote: (Originally Posted by jradomski)

I use this type of adv as well, What I decided to do was to put a bead of silicon around the outside of the diaphram, this seals it to the adv and you can hold a real good negative test regardless of how much of a vacuum you try and pull..

Silicon grease or sealant

16th January 2006, 22:43	#1 (permalink)
divegyrl New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Sep 2005 Location: Sutton, Surrey Posts: 18	Bob Howell ADV Hope this is in the correct place..... I bought a 2nd hand Inspo Classic with a Bob Howell ADV on it, it does not hold negative & I have worked out that the leak is definitely coming from the ADV. My question is: how do you take the thing apart and check/repair it? I have searched the internet and can't find anything useful. Can anyone help? Many thanks, __________________ Blanaid
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17th January 2006, 02:28	#2 (permalink)
*diverklondike* Moderator Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Oct 2005 Location: Delaware, USA Posts: 1,561	Re: Bob Howell ADV If I remember correctly the top simply screws off exposing the diaphram etc.. From that point on it was pretty straight forward. Was using a bob adv until the AP one came out. Dive Safe... Mark
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17th January 2006, 03:26	#3 (permalink)
Steve Ladies bring a plate Current Rebreather/s: Megalodon Home Build Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Classic Kiss MK 15.X Home Build Join Date: Feb 2005 Location: Perth - Australia Posts: 1,100	Re: Bob Howell ADV Am I understanding you correctly? Do AP have an OC/CC DSV? __________________ WARNING: I contain occasional coarse language, extreme sexual references, nudity, and adult themes, which may offend some people - Usually churchy types.
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17th January 2006, 03:45	#4 (permalink)
wizbang WEB MERMEN Current Rebreather/s: Inspiration Classic Dolphin Home Build Other Rebreather/s: Not Bought Yet Inspiration Vision Evolution Prism Topaz Sport Kiss Classic Kiss Dolphin Home Build Join Date: Feb 2005 Location: Perth Australia Posts: 385	Re: Bob Howell ADV Quote: (Originally Posted by Steve) Am I understanding you correctly? Do AP have an OC/CC DSV? No you are not. NOT OC/DSV (BOV) but ADV. Bob did both, but he wouldn't return my emails to get a dolphin BOV.
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17th January 2006, 06:27	#5 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 824	Re: Bob Howell ADV Quote: (Originally Posted by divegyrl) I bought a 2nd hand Inspo Classic with a Bob Howell ADV on it, it does not hold negative & I have worked out that the leak is definitely coming from the ADV. My question is: how do you take the thing apart and check/repair it? I have one. It does hold negative but not hugely long. Also doing a negative check is a bit mean to the diaphragm so I only make a simple check. Do you have a flow stop? That makes it much easier to get a negative. If not you have to drain the DIL first stage. The top plate unscrews. Under this is the diaphragm. The reg mechanism is a solid lump that is held in by the nut. It just bolts through the wall of the ADV. The works come from an Aqualung LPO (a cheapy slimline octopus reg not actually sold in the UK). __________________ nigelh
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17th January 2006, 12:00	#6 (permalink)
Juz Team Kinky Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: London UK Posts: 147	Re: Bob Howell ADV Am I right in thinking the part that unscrews is the circular part holding the 'purge' button. Is it just a matter of 'gripping' the ring with molegrips and turning it............. Juz __________________ ~KINKY DIVERS~ Because going down is fun We are all prompted by the same motives, all deceived by the same fallacies, all animated by hope, obstructed by danger, entangled by desire and seduced by pleasure. Welcome to Kinky Divers!
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17th January 2006, 12:13	#7 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 824	Re: Bob Howell ADV Quote: (Originally Posted by Juz) Am I right in thinking the part that unscrews is the circular part holding the 'purge' button. Is it just a matter of 'gripping' the ring with molegrips and turning it............. ARGH!!!!! It's only a bit of plastic. How about palm of the hand flat on it and turn on friction. We are talking about the same thing aren't we? __________________ nigelh
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17th January 2006, 12:15	#8 (permalink)
Juz Team Kinky Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: London UK Posts: 147	Re: Bob Howell ADV Quote: (Originally Posted by nigelh) ARGH!!!!! It's only a bit of plastic. How about palm of the hand flat on it and turn on friction. We are talking about the same thing aren't we? That's the chappie. The part with the 'nike' logo holes is soft an dthe ring around it is hard. It's that ring that I assume needs to turn. Juz __________________ ~KINKY DIVERS~ Because going down is fun We are all prompted by the same motives, all deceived by the same fallacies, all animated by hope, obstructed by danger, entangled by desire and seduced by pleasure. Welcome to Kinky Divers!
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17th January 2006, 12:18	#9 (permalink)
*jradomski* Moderator Current Rebreather/s: Inspiration Classic Sport Kiss Optima rEvo Other CCR Home Build Other Rebreather/s: Inspiration Vision Evolution Megalodon Classic Kiss rEvo Other CCR Home Build Join Date: Mar 2005 Location: "Da" Bronx Posts: 2,895	Re: Bob Howell ADV Quote: (Originally Posted by divegyrl) Hope this is in the correct place..... I bought a 2nd hand Inspo Classic with a Bob Howell ADV on it, it does not hold negative & I have worked out that the leak is definitely coming from the ADV. My question is: how do you take the thing apart and check/repair it? I have searched the internet and can't find anything useful. Can anyone help? Many thanks, The diaphram cover screws off easily.. You need to determine where the leak is comming from.. put a cutoff on the adv, and see if gas is comming from the first stage.. if not the most likely source is that the diaphram is being stretched a bit too far and its making a gap to where the cover holds it down (into the groove).. (this is the most likely source).. In fact its usually right at the point where the gas valve is installed.. I use this type of adv as well, What I decided to do was to put a bead of silicon sealent around the outside of the diaphram, this seals it to the adv and you can hold a real good negative test regardless of how much of a vacuum you try and pull.. __________________ Joe Radomski CCR Trimix Instructor Trainer ANDI Instructor Trainer Director #10 All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated. Last edited by jradomski : 17th January 2006 at 12:45.
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17th January 2006, 12:20	#10 (permalink)
*Beanie* Close to that red button Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,207	Re: Bob Howell ADV Quote: (Originally Posted by jradomski) I use this type of adv as well, What I decided to do was to put a bead of silicon around the outside of the diaphram, this seals it to the adv and you can hold a real good negative test regardless of how much of a vacuum you try and pull.. Silicon grease or sealant __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
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