From JJ to rEvo

Tiptopperoo said:
Glad you're enjoying the rEvo. From what I've seen they are very nice units. The RMS system seems very handy and the scrubber design is great. You shouldn't have any more head removal troubles.

Though if that was really causing you that much trouble...is CCR for you? :p
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The reason to change to a rEvo from a JJ was due to a number of factors (head removal was not a significant reason for me) however this is a big issue if you are are small female diver like my wife is, to break down and reasemble a JJ just does not work.

For me, the main reason is that the rEvo just dives better and is less restrictive underwater than the JJ.

end of day its a subjective call but glad I have changed.
 
My JJ from 2012 was a twat to remove and pushing the button during my level 1 course I managed to shave off the tip of my thumb as I had to pull so hard on the strap! The grease from the factory was really viscous but once I changed that it was easier but still a hazard for my thumb so I used the DIN dust cap instead. I sold this JJ and the new owner actually broke the strap one day.
Now my new JJ is a dream and the head comes out easily with no risk to my thumb!
 
nickb said:
Yet when other owners with the opposite POV dare state their opinion:


If you kept on saying what you're saying despite the overwhelming opinion to the contrary, I would definitely say that to your face. Or are you implying that you're big and scary, therefore I'd bottle-out?
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Nick , a few posts from the JJ fan club members does not represent an overwhelming opinion.

In regards to my comments about a positive assisting the head removal on a JJ if you actually try this method you will find it to be correct.

The previous poster also stated that pulling a positive on a JJ would actually make head removal harder.... this is totally incorrect, if you actually do own a JJ i would suggest you try the positive head removal method. The design of the JJ head with double O rings are from external inwards. ie increased resistance the further the head is pushed down to the point where the inner flange actually acts as a plug, if you create positive pressure within the Can then the reverse occurs. The O rings under pressure statement only applies in some engineering designs and definitely does not apply to the JJ . This is a very known method with JJ divers , I am very surprised that you do not seem to know very much about your own JJ?
 
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pig004 said:
My JJ from 2012 was a twat to remove and pushing the button during my level 1 course I managed to shave off the tip of my thumb as I had to pull so hard on the strap! The grease from the factory was really viscous but once I changed that it was easier but still a hazard for my thumb so I used the DIN dust cap instead. I sold this JJ and the new owner actually broke the strap one day.
Now my new JJ is a dream and the head comes out easily with no risk to my thumb!
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Great to hear the new units dont have this issue, my JJ was from 2011
 
After the Dive

Step Description
1 Never close the tank valves before you take off the Rebreather.
2 Switch the controller off and dry the water contacts.
3 Switch off the HUD.
4 Close both tank valves.
5 Remove the breathing hose with the DSV.
6 Remove the lid with the soda lime canister from the aluminium housing.
7 Remove the soda lime canister from the lid.
8 Leave the lid and the soda lime canister to dry.

the manual must be written by someone whit now knowledge of it...
 
Venomguy said:
Mark. You seem to be out of touch with the newer models. Suggest you expand your horizons a bit ...best advice is try both on back to back dives and the decision is simple to switch.
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Mods such as?


Do the new rEvo HUDS now have 1 LED per cell that shows actual PP02 on that cell?

If not how do you monitor cell health whilst diving by just using the HUD?

I have seen a recent rEvo and I havent noticed any fundimental changes elsewhere but I am copmleetly open to a list of whats changed

ATB

Mark
 
Venomguy said:
I don't believe you know what your talking about. But happy you seem to have one of the only JJs where you can remove the head easily.
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I have one of the very first JJ units in the UK

My head was a bugger but they sent me new 0 rings and no its push down first and then pull out prety easy.

A lot easier than trying to get the head off a vision :D I striped Petes unit for him last week and it cost me a fingernail :(

ATB

Mark
 
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SilentDiver said:
Errr turn 3 catches and lift up dont see how it could be any easier to be honest......

Oh yeah dont forget to disconnect solenoid feed and temp stick cable once you have room to get to it :)
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There were 5 inspos on te boat and every night I watched people strugling to get the heads off due to vacum. The main issue being the luggs are a bit small to get leverage on. Hence my riped finger nail

ATB

Mark
 
Mark Chase said:
There were 5 inspos on te boat and every night I watched people strugling to get the heads off due to vacum. The main issue being the luggs are a bit small to get leverage on. Hence my riped finger nail

ATB

Mark
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What vacuum? Should be at ambient pressure. Both my vision heads have popped easily. Thumb on lug, 4 fingers under rim, pops off easily. Technique not brute force required...
 
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I'm sorry to hear of your ripped fingernail Mark. Lucky us tech divers are so tough we can power through these grievous injuries that would bring mere mortals/rec divers to their knees!
 
Tiptopperoo said:
I'm sorry to hear of your ripped fingernail Mark. Lucky us tech divers are so tough we can power through these grievous injuries that would bring mere mortals/rec divers to their knees!
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Thanks

It was OK though as i had some nail varnish handy to repair it with ;)

ATB

Mark
 
jptaylor9 said:
What vacuum? Should be at ambient pressure. Both my vision heads have popped easily. Thumb on lug, 4 fingers under rim, pops off easily. Technique not brute force required...
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It makes me laugh when people rush to defend the indefensable about their units. The guys i was diving with have owned their inspos since 2006 and I watched them having an arse of a job poping the lids on their units and I strpied Pets unit after he was laid up and I too struggled. QED its an issue on at least SOME inspos.

JJ was the same but due to the handle on the top of the head its just easier to get leverage on.

Perhaps vacume is the wrong term but I know having just asembled my unit the head comes off very easily but post dive its virtualy impossable unless you push down first then lift it out.

Ifound the same post dive increase in force required on the rEvo

The kiss probably had it too but the unit was fundimentaly diferent in that you remove the body from the head and not the other way round so you had so much leverage you wouldent notice

ATB

Mark
 
Mark Chase said:
It makes me laugh when people rush to defend the indefensable about their units. The guys i was diving with have owned their inspos since 2006 and I watched them having an arse of a job poping the lids on their units and I strpied Pets unit after he was laid up and I too struggled. QED its an issue on at least SOME inspos.
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Not defending, just countering your statement that implied it's a fault on the Inspo, you've now said SOME. Maybe some do have tight fitting lids, maybe thay use Crystaloube rather than silicon grease, seen some folks removing head when still attached to T-pieces, maybe they need to replace the o-ring on the head. But for the majority of units it isn't an issue.

For the record I've also owned Visions since 2006...

(A handful of Visions used by Delta are not a statistically significant sample)
 
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