What goes wrong when your 'breather gets old

Abbo · 6th July 2008, 08:49

In the "Reading Material for Mixed Gas" thread, I asked a bunch of questions I would like to see answered in a good CCR trimix book. I asked one block of those questions in "Which Bailout Gas"; here is another block:

By the time you start CCR trimix, you have probably logged around 100hrs on your unit. It's no longer new, and things are starting to go wrong. What things things start happening at this stage, and how can I fix them? What was the hardest to identify problem you've had with your unit? How did you find it? How did you fix it?

Hanssing · 6th July 2008, 09:36

Quote: (Originally Posted by Abbo)

What things things start happening at this stage, and how can I fix them? What was the hardest to identify problem you've had with your unit? How did you find it? How did you fix it?

Well with only 75'ish hours on the rEvo I can list the following:
* Had to change batteries after 70'ish hours....
* Had some LP-hoses leak slowly due to bad crimping - replaced.
* Had to replace some bad cells.
* Had some bad elctrical crimps on cell-molex'es, pestered around figguring out if it was cells or crimps...

The worst was by far the molex/crimp, as it was intermitten, and the rEvo-dreams does not indicate wich of the two cells are being displayed. Took some time to figure out and get right. But this is more than 40hrs ago, and its been flawless ever since (solder-crimp-solder).

Not many things to go wrong the rEvo - so we'll see later on....

Nicolai

paulraymaekers · 6th July 2008, 10:22

Quote: (Originally Posted by Hanssing)

Took some time to figure out and get right. But this is more than 40hrs ago, and its been flawless ever since (solder-crimp-solder).

... and this is the way all the molexes are now mounted on the rEvodreams or the Shearwater Pursuits...

we all learn!

paul

Numpty diver · 6th July 2008, 10:27

Most life support kit requires regular service by trained pros.
Send it in for service each year or when manufacturer recommends , it will never get old... mabye a bit lacking in modern tecnolgy

numpty

**wedivebc** · 6th July 2008, 14:01

Quote: (Originally Posted by Abbo)

In the "Reading Material for Mixed Gas" thread, I asked a bunch of questions I would like to see answered in a good CCR trimix book. I asked one block of those questions in "Which Bailout Gas"; here is another block:

By the time you start CCR trimix, you have probably logged around 100hrs on your unit. It's no longer new, and things are starting to go wrong. What things things start happening at this stage, and how can I fix them? What was the hardest to identify problem you've had with your unit? How did you find it? How did you fix it?

Problems? Let's see. In 250hrs I have changed batteries 4 times. Changes sensors 3 times. Tighted one oxygen injection connector, and serviced the solenoid and the regs.
Other than the loose pipe on the oxygen injection everything else would be routine maintenance.

Oh yeah, I service the DSV about every month or 2.

Ben Field · 7th July 2008, 14:11

Not including regular servicing, replacing consumables (batteries/cells etc) and upgrades (New electronics)...

Replaced ADV Diaphram- it gets "loose" with age on CK.

Replaced Breathing Hose QC O-ring- got kinked by poor assembly, possibly old/loose o-ring or insufficent lube? (more likely- User error/I was rushing!)

Replaced Head retaining bolt- corroded in place in Ali spine and had to be drilled out. (Poor materials choice/lack of maintenance?)

Otherwise (touchwood) well behaved!

jiseson · 7th July 2008, 15:29

the diver is getting older too and needs regular maintainence

Hanssing · 7th July 2008, 17:48

Quote: (Originally Posted by paulraymaekers)

... and this is the way all the molexes are now mounted on the rEvodreams or the Shearwater Pursuits...

we all learn!

For completeness I should add that Paul offered to redo all the crimps (solder-crimp-solder) free of charge, except for transport (wich I woudl get free through work). But I like to fiddle, and had the tool at hand, so I did them myself. Gold-plated pins were supplied free of charge by Paul.

So its really a minor thing to fix, and I recieved full service from Paul!

"I think that goat is shaven now" - danish saying

Nicolai

tflaris · 8th July 2008, 13:59

Batteries
Cells
HP Hose

58 hours on a Evolution

Mercy · 8th July 2008, 14:06

Well, I dive a inspiration classic, when drying the head you should never hold the head higher then the computers, because in this way any condense or other moist could seep in the hollow tubing's towards you computers and corrode them so bad that nothing works any more…

I wish somebody told me this before…

have a nice dive

mercy

6th July 2008, 08:49	#1 (permalink)
Abbo Nicholas Smith Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2006 Location: Tokyo Posts: 449	What goes wrong when your 'breather gets old In the "Reading Material for Mixed Gas" thread, I asked a bunch of questions I would like to see answered in a good CCR trimix book. I asked one block of those questions in "Which Bailout Gas"; here is another block: By the time you start CCR trimix, you have probably logged around 100hrs on your unit. It's no longer new, and things are starting to go wrong. What things things start happening at this stage, and how can I fix them? What was the hardest to identify problem you've had with your unit? How did you find it? How did you fix it?
(Online)

6th July 2008, 09:36	#2 (permalink)
Hanssing flap-flop ..... flap-flop Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Denmark Posts: 407	Re: What goes wrong when your 'breather gets old Quote: (Originally Posted by Abbo) What things things start happening at this stage, and how can I fix them? What was the hardest to identify problem you've had with your unit? How did you find it? How did you fix it? Well with only 75'ish hours on the rEvo I can list the following: * Had to change batteries after 70'ish hours.... * Had some LP-hoses leak slowly due to bad crimping - replaced. * Had to replace some bad cells. * Had some bad elctrical crimps on cell-molex'es, pestered around figguring out if it was cells or crimps... The worst was by far the molex/crimp, as it was intermitten, and the rEvo-dreams does not indicate wich of the two cells are being displayed. Took some time to figure out and get right. But this is more than 40hrs ago, and its been flawless ever since (solder-crimp-solder). Not many things to go wrong the rEvo - so we'll see later on.... Nicolai __________________ Woohooo - I can change my rEvo! Its going to be bitchin' tricked out piece of gear
(Online)

6th July 2008, 10:22	#3 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,498	Re: What goes wrong when your 'breather gets old Quote: (Originally Posted by Hanssing) Took some time to figure out and get right. But this is more than 40hrs ago, and its been flawless ever since (solder-crimp-solder). ... and this is the way all the molexes are now mounted on the rEvodreams or the Shearwater Pursuits... we all learn! paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
(Online)

6th July 2008, 10:27	#4 (permalink)
Numpty diver Custom Title Allowed! Current Rebreather/s: Megalodon Other CCR Dolphin Ray Home Build Other Rebreather/s: Other CCR Dolphin Ray Home Build Join Date: Jul 2006 Location: Norway, Bergen Posts: 204	Re: What goes wrong when your 'breather gets old Most life support kit requires regular service by trained pros. Send it in for service each year or when manufacturer recommends , it will never get old... mabye a bit lacking in modern tecnolgy numpty
(Offline)

6th July 2008, 14:01	#5 (permalink)
wedivebc Dave Tomblin Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Other CCR Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,447	Re: What goes wrong when your 'breather gets old Quote: (Originally Posted by Abbo) In the "Reading Material for Mixed Gas" thread, I asked a bunch of questions I would like to see answered in a good CCR trimix book. I asked one block of those questions in "Which Bailout Gas"; here is another block: By the time you start CCR trimix, you have probably logged around 100hrs on your unit. It's no longer new, and things are starting to go wrong. What things things start happening at this stage, and how can I fix them? What was the hardest to identify problem you've had with your unit? How did you find it? How did you fix it? Problems? Let's see. In 250hrs I have changed batteries 4 times. Changes sensors 3 times. Tighted one oxygen injection connector, and serviced the solenoid and the regs. Other than the loose pipe on the oxygen injection everything else would be routine maintenance. Oh yeah, I service the DSV about every month or 2. __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
(Offline)

7th July 2008, 14:11	#6 (permalink)
Ben Field CK+Shearwater Current Rebreather/s: Classic Kiss Other Rebreather/s: Sport Kiss Join Date: Aug 2005 Location: London, England Posts: 1,632	Re: What goes wrong when your 'breather gets old Not including regular servicing, replacing consumables (batteries/cells etc) and upgrades (New electronics)... Replaced ADV Diaphram- it gets "loose" with age on CK. Replaced Breathing Hose QC O-ring- got kinked by poor assembly, possibly old/loose o-ring or insufficent lube? (more likely- User error/I was rushing!) Replaced Head retaining bolt- corroded in place in Ali spine and had to be drilled out. (Poor materials choice/lack of maintenance?) Otherwise (touchwood) well behaved! __________________ Know your PPO2, Pre-breath, Use checklists, Validate cells at 6mtrs, Use pure O2 at or near surface, Use a BOV, Don't dive Solo, Change Slime and Cells as recommended by Manufacturer and RTFM! Beware Fridge Suck! www.hugsac.org.uk
(Online)

7th July 2008, 15:29	#7 (permalink)
jiseson DSIX/O2PTIMA Current Rebreather/s: Optima Other Rebreather/s: Join Date: Jun 2006 Location: long island,ny Posts: 561	Re: What goes wrong when your 'breather gets old the diver is getting older too and needs regular maintainence __________________ *Jonathan D Iseson*
(Offline)

7th July 2008, 17:48	#8 (permalink)
Hanssing flap-flop ..... flap-flop Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Denmark Posts: 407	Re: What goes wrong when your 'breather gets old Quote: (Originally Posted by paulraymaekers) ... and this is the way all the molexes are now mounted on the rEvodreams or the Shearwater Pursuits... we all learn! For completeness I should add that Paul offered to redo all the crimps (solder-crimp-solder) free of charge, except for transport (wich I woudl get free through work). But I like to fiddle, and had the tool at hand, so I did them myself. Gold-plated pins were supplied free of charge by Paul. So its really a minor thing to fix, and I recieved full service from Paul! "I think that goat is shaven now" - danish saying Nicolai __________________ Woohooo - I can change my rEvo! Its going to be bitchin' tricked out piece of gear
(Online)

8th July 2008, 13:59	#9 (permalink)
tflaris God save the Queen Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Evolution Megalodon Join Date: Oct 2006 Location: Neptune Beach, Florida Posts: 247	Re: What goes wrong when your 'breather gets old Batteries Cells HP Hose 58 hours on a Evolution __________________ "Except for this one, I have come to the conclusion that all generalizations are false" -Jim Hayes
(Offline)

8th July 2008, 14:06	#10 (permalink)
Mercy New Member Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Sep 2005 Location: antwerp, belgium Posts: 9	Re: What goes wrong when your 'breather gets old Well, I dive a inspiration classic, when drying the head you should never hold the head higher then the computers, because in this way any condense or other moist could seep in the hollow tubing's towards you computers and corrode them so bad that nothing works any more… I wish somebody told me this before… have a nice dive mercy
(Offline)

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