Buying a JJ

Aaen

Aaen

Member
So i've decided to buy a JJ an am curious as to what options/spares if any I should buy when I get the unit.
Unit:
-international lite edition(hopefully a bov, if one can still get em).

Spares:
-spares (unit o-rings & BOv oring)
-jj o2 cell,


Anything else you guys can thing of I might need or you found to break/wear out quickly, keep in mind I live in Canada, so the supplies are not not readily available. Mind you they aren't for any rebreathers here without ordering, neither is support on the rebreathers except for kiss. Well iSc is a 5 hr drive but that is about all.

Rather excited and looking forward to doing the course this summer and heading to the UK to do the training, visit the brother in London, but mostly I can't wait to pick up another rebreather and get off the gf's meg and away from the donkeys arse feeling of the otscl.

Regards

Steve
 
The unit is rock solid so not a lot but since you are effectively in a remote area I would buy some flap valves and an o ring kit plus a spare cell and convoluted hoses.

This has been answered before look inside the JJ sub forum. Plenty of answers to someone asking the same question travelling to a remote location.

D

Ps enjoy the unit.

Sent from my GT-I9300 using Tapatalk 2
 
Spare cell, flapper valves, o rings and scrims. If you're looking at bov check out the golem gear one, seems to be the favourite over the OEM on most JJ forums. They've not got it CE yet so I reckon it might be needing some redesign.
 
TxNinja said:
Spare cell, flapper valves, o rings and scrims. If you're looking at bov check out the golem gear one, seems to be the favourite over the OEM on most JJ forums. They've not got it CE yet so I reckon it might be needing some redesign.
Click to expand...

You can´t buy the JJ BOV anymore even if you are outside EU. The best option is probably the Golem Gear Shrimp left feed for Dolphin hose. It fits the JJ hoses and takes 5 min to install and the breathing performance is very good, actually i can´t tell any difference in breathing performance from a standard high performance balanced 2nd stage. It is better then the JJ BOV in every aspect i believe. So that would probably be on your shopping list as you seem to be a fan of BOV´s.

The standard harness is utter crap i believe. Depends on your preference but if you are like me and don´t like dangles and unnecessary things hanging about throw it in the garbage ASAP. I replaced it with a a Halcyon harness and backplate. I also replaced the JJ wing with a halcyon Evolve. The JJ wing is not bad but i think the Evolve is better as it has more lift in the ass and seems to dump air more efficiently. The pressure gauges are configured in a weird way. They are hard to pull back once you pulled them out. I tried to put bungie pulling them back but still did not work well. Diluent you don´t really need to see the pressure anyway. If i would run out of DIL i just take a breath from my BOV and exhale in to the lung. Which brings me to another item you may want, a sawage lock fitting to connect your BOV to your off board bail.
I ran the o2 gauge over the shoulder instead. I posted about that in another thread.


I am heading towards 2x7 dillunets flex manifolded. So if you want to go that rout there are other items on your shopping list. The JJ CCR is the rebreather that requires the least amount of mods in my opinion. It can be dived as it is with great success and many divers are not modifying it at all. If i would only chose one thing to modify it would be the harness and that is very easy to do. When i first got it i replaced the harness that was it. I then dove it for around 50 hours before modifying anything else. Do one step at a time. You may find that you like it pretty much as it is.

You have made a good buying decision and i think you will be happy with it. The cells are pretty unlikely to fail as long as you replace them every 12 months. I have a few JJ divers around me and none have had any cell failures. So a spare cell is good to have but you are not likely to need it but as you live in a "remote" location it might be a good idea. HH is now using Vando cells to?. Might be a closer source for you'? Not sure if they have the same connections though.
 
Last edited:
Thanks for the tips.

BOV, if I can't get it I will leave it as is for the time being and figure something out I want. Not sure on the Golem ones, but will probably be what I end up with if they do not have one available, I really loved my ISC one but I sold it when I decided to part with the MEG awhile back.

Igor, good points I'm a former DIR/GUE/UTD/Mentored in to the club guy. So I suspect you and i will be thinking along the same lines, I hate clutter. I was leaning towards probably switching out the wing and bp to my agir setup I used on the meg. Loved it was rock solid, sadly I noticed the other day I managed to pinch flat the wing on something though(4 years of abuse and I manage to pinch flat the darn thing I believe on a tank in my truck, or my suit inflate bottle)

Regardless I am going to leave it as it once I get it for awhile and figure out what I want to do with it. I already have my thoughts in place, but I want to get comfy with the fundamentals of the unit before I start to change things around.

thanks

Steve
 
Igor said:
You can´t buy the JJ BOV anymore even if you are outside EU. The best option is probably the Golem Gear Shrimp left feed for Dolphin hose. It fits the JJ hoses and takes 5 min to install and the breathing performance is very good, actually i can´t tell any difference in breathing performance from a standard high performance balanced 2nd stage. It is better then the JJ BOV in every aspect i believe. So that would probably be on your shopping list as you seem to be a fan of BOV´s.

The standard harness is utter crap i believe. Depends on your preference but if you are like me and don´t like dangles and unnecessary things hanging about throw it in the garbage ASAP. I replaced it with a a Halcyon harness and backplate. I also replaced the JJ wing with a halcyon Evolve. The JJ wing is not bad but i think the Evolve is better as it has more lift in the ass and seems to dump air more efficiently. The pressure gauges are configured in a weird way. They are hard to pull back once you pulled them out. I tried to put bungie pulling them back but still did not work well. Diluent you don´t really need to see the pressure anyway. If i would run out of DIL i just take a breath from my BOV and exhale in to the lung. Which brings me to another item you may want, a sawage lock fitting to connect your BOV to your off board bail.
I ran the o2 gauge over the shoulder instead. I posted about that in another thread.


I am heading towards 2x7 dillunets flex manifolded. So if you want to go that rout there are other items on your shopping list. The JJ CCR is the rebreather that requires the least amount of mods in my opinion. It can be dived as it is with great success and many divers are not modifying it at all. If i would only chose one thing to modify it would be the harness and that is very easy to do. When i first got it i replaced the harness that was it. I then dove it for around 50 hours before modifying anything else. Do one step at a time. You may find that you like it pretty much as it is.

You have made a good buying decision and i think you will be happy with it. The cells are pretty unlikely to fail as long as you replace them every 12 months. I have a few JJ divers around me and none have had any cell failures. So a spare cell is good to have but you are not likely to need it but as you live in a "remote" location it might be a good idea. HH is now using Vando cells to?. Might be a closer source for you'? Not sure if they have the same connections though.
Click to expand...

If the harness is adjusted properly there are no danglie bits and the adjustment facility is very important. a one piece harness for instance may allow the unit to move around on your back, our adustable harness allows you to get a correct fit and position but without breaks from plastic clips and no danglies.
I set mine up so the left hand shoulder is adjusted for the correct fit with no tail on the pull down, the right hand pull down has about 3-4-cm of extra to pull on and tighten, and loosen to get out easy but still keeping the unit tight on my back and in the correct position as far as the tee's go. waist and crutch straps are then cut to fit.

cheers
 
Dave,
I think you said you use a Dive Rite Rec Wing on yours.?Did you keep the bungee or remove it?
I'm just planning on doing the same this weekend, the slots also seem to match up OK for the hoses to go through.
Cheers
Dave
 
Dave1w said:
Dave,
I think you said you use a Dive Rite Rec Wing on yours.?Did you keep the bungee or remove it?
I'm just planning on doing the same this weekend, the slots also seem to match up OK for the hoses to go through.
Cheers
Dave
Click to expand...
Yes I do as mine is an early unit they used to come with diverite wings I have just kept it on as I actually like it

, wing is standard, bungee still in place
 
:0. Bungie still in place!!!!! My god call the scuba police!!

Dave looking forward to doing the x-over with you.
 
JJ ccr

speciall tools for repair the JJ (BATTERY COMPARTMENT-FRIST STAGE)
o-RINGS
SERVICE KITE for first stage
intermediate pressure guage
Lubrecante
Battery
saft battery
scrim (on jj it's strong and heavy duty)
screws for backplate
 
I got my JJ in December 09 so about 2.5 years of service so far.


Most important spares are:

Scrims

Batteries

Special star driver to get into the battery box

Cells

Head 0 rings (Can get cut asembling the head)

02 feed 0 rings

0 rings for the 90 degree swivel joints

SS lock cable ties.

Aquasure.

Biox

02 grease




Most are obvious but the SS cable ties are for when it fails negative / positive test. Normaly its the loop hose to T piece, head or mouthpiece conection that are failing and the quick fix is a cable tie on the ring below the SS ring.


Aquasure is for the counterlungs as they seem to have a habit of springing leaks


Biox is for the 02 inject unit which can get scuzzed up by salt water on livaboard trips and will jam on. Always check your 02 inject buttion before a dive. Also the HP conections to the gauges should e bioxed once in a while as the begin to fiz if not. Again the 02 conect can get slated up so biox is good there too.

Worst gas leak to fix is 02 feed into the T piece and Dill feed into the T pece via the 90 degree swivels. 02 grease can get you out of trouble for a dive or two but replaceing the 0 rings meens trashing the old ones with a tooth pic to get them out.

Apart from it being a sod on pos neg tests, I have had very few problems with my JJ and i am very happy with the new scrubber can and stand design.

I am using the Golum Shrimp with Drager fittings and its very nice to use and the quick releas system is convenient for kit cleening / water draining.

As a very last and somwhat controversial recomendation.

I carry a KISS valve riged and ready to replace the standard 02 feed with should i suffer solinoid or handset failure on a dive trip. Id then happily dive the unit with just the KISS valve and HUD.

Another top tip is if you use the tube weights, take them out and rinse after every dive or so because they will rust in place if you dont.


Al in all a very solid CCR and a joy to dive. Nothing else out there interests me at the moment

ATB
 
I got my JJ in December 09 so about 2.5 years of service so far.


Most important spares are:

Scrims

Batteries

Special star driver to get into the battery box

Cells

Head 0 rings (Can get cut asembling the head)

02 feed 0 rings

0 rings for the 90 degree swivel joints

SS lock cable ties.

Aquasure.

Biox

02 grease




Most are obvious but the SS cable ties are for when it fails negative / positive test. Normaly its the loop hose to T piece, head or mouthpiece conection that are failing and the quick fix is a cable tie on the ring below the SS ring.


Aquasure is for the counterlungs as they seem to have a habit of springing leaks


Biox is for the 02 inject unit which can get scuzzed up by salt water on livaboard trips and will jam on. Always check your 02 inject buttion before a dive. Also the HP conections to the gauges should e bioxed once in a while as the begin to fiz if not. Again the 02 conect can get slated up so biox is good there too.

Worst gas leak to fix is 02 feed into the T piece and Dill feed into the T pece via the 90 degree swivels. 02 grease can get you out of trouble for a dive or two but replaceing the 0 rings meens trashing the old ones with a tooth pic to get them out.

Apart from it being a sod on pos neg tests, I have had very few problems with my JJ and i am very happy with the new scrubber can and stand design.

I am using the Golum Shrimp with Drager fittings and its very nice to use and the quick releas system is convenient for kit cleening / water draining.

As a very last and somwhat controversial recomendation.

I carry a KISS valve and fixed IP first stage riged and ready to replace the standard 02 feed with should i suffer solinoid or handset failure on a dive trip. Id then happily dive the unit with just the KISS valve and HUD.

Another top tip is if you use the tube weights, take them out and rinse after every dive or so because they will rust in place if you dont.


Al in all a very solid CCR and a joy to dive. Nothing else out there interests me at the moment

ATB
 
Swap tear-aid for aquasure for fixing holes - far superior and doesn't float off :)
 
Excellent advice, I will definitely be looking into a this. Its pretty much the same kit as my Meg but a few add ones here and there.

So what is the issue with the lungs and springing leaks? Does this happen to everyone?





Steve

Sent from my iPad using Tapatalk HD
 
Aaen said:
Excellent advice, I will definitely be looking into a this. Its pretty much the same kit as my Meg but a few add ones here and there.

So what is the issue with the lungs and springing leaks? Does this happen to everyone?

Steve

Sent from my iPad using Tapatalk HD
Click to expand...

It can happen if the lung gets pinched by the T-piece under transport.
 
Aaen said:
Excellent advice, I will definitely be looking into a this. Its pretty much the same kit as my Meg but a few add ones here and there.

So what is the issue with the lungs and springing leaks? Does this happen to everyone?





Steve

Sent from my iPad using Tapatalk HD
Click to expand...


The quality of Tesco shopping bags hasent been what it once was and the JJ seems to have had a bad batch :D


Yes its a common problem.


ATB

Mark
 
A spare nut for the pressure plate in the scrubber, i have a stainless M10 in spare. The delerin one bouncing easily, sometime into a place yot dont want it to.
 
GO.. said:
It can happen if the lung gets pinched by the T-piece under transport.
Click to expand...

Ah same as a pinch flat with a wing. I figured you meant they were just developing holes after use. Makes sense now.

Thanks



Steve

Sent from my iPad using Tapatalk HD
 
Buying a JJ CCR

I have been sending these guys emails for months.... No reply, anyone know how else to get in contact with them?
 
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