Replacing shoulder dump cable question

[ironmandiver]

I've got an old Tekna BCD and I'm thinking about converting the inflator hose to include a Tusa Duo Air octopus. Looks like it will work for me but I cant see how to remove and reinstall the shoulder dump cable.

Can anyone offer any suggestions?

Thanks,
ID

 

[redacted]

That cable should run thru a SS pin in the inflator. The pin should simply press out from the side after you have detatched the corrugated hose from the inflator. Pin sizes are not std so the octo/inflator may require a different diameter SS pin.

 

[DA Aquamaster]

The pin will be visible when you pull the corrogated hose up off the old inflator. The new Air 2 should come with it's own pin whihc is larger in diameter. One problem I have seen from time to time is that the loop in the old cable may be too small. In that case you need some stainless steel cable and a pair of ferrules to crimp new loops in both ends of the cable.

On the dump end of the cable, the cable usually runs through a hole in the dump valve and is not removeable without cutting the cable loop.

 

[ironmandiver]

Thanks for the feedback!!

I can see the cable is attached to the dump valve with a loop and screw. It appears the screw/loop/cable cant be removed from the dump valve housing without further disassembly.

Also, it looks like the shoulder dump valve housing must come apart to remove the ss pin. There just isn't enough clearance to slide the pin sideways to remove it. The pin does move freely but contacts the housing before its far enough to remove from the actuator.

I can easily cut the cable (and replace it) but I still wont be able to access the screw/loop. It looks like further disassembly of the housing is required. Unfortunately, it's not obvious how to get the housing apart.

Any suggestions??
Thanks,

ID

 

[redacted]

I don't understand why you are messing with the dump valve end of the assembly to change to an octo/inflator. From what little I have seen of these devices, that end of the assembly seems to be quite non-standard so disassembly and reassembly may be an adventure.

 

[DA Aquamaster]

I would not remove any more than you have too - expecially with an out of production BC.

The cable almost always attaches to the inflator with a simple pin through the cable loop. Just use the old cable to the dump valve. In the event the old loop is too small and/or in the event you add a longer corrogated hose and consequently need a longer dump cable, cut the loop off and using 2 cable crimps crimp a longer piece of cable on and form a new loop with another crimp. I woudl not mess with the shoudler dump at all. Many plastics do not age all that well and while srong enough as is, something may crack or break if you try to disssemble and reassemble it.

Plan B is often to replace the entire shoulder dump and corrogated hose aseembly - but that requires the hole in the BC to be a standard size.

 

[ironmandiver]

Seems to me, I must detach at least one end of the cable. At first, it looked like detaching the cable from the inflator was not possible. I've just looked a little closer at the inflator and it does appear that I can remove the cable from it. This would mean that I dont need to mess with the dump valve as you said.
Thanks.

 

[ironmandiver]

I would not remove any more than you have too - expecially with an out of production BC.

The cable almost always attaches to the inflator with a simple pin through the cable loop. Just use the old cable to the dump valve. In the event the old loop is too small and/or in the event you add a longer corrogated hose and consequently need a longer dump cable, cut the loop off and using 2 cable crimps crimp a longer piece of cable on and form a new loop with another crimp. I woudl not mess with the shoudler dump at all. Many plastics do not age all that well and while srong enough as is, something may crack or break if you try to disssemble and reassemble it.

Plan B is often to replace the entire shoulder dump and corrogated hose aseembly - but that requires the hole in the BC to be a standard size.

After looking a little closer, it seems I can do this without removing the cable from the dump valve. I am concerned about the length of the new cable (since I dont have it yet,) but I think your crimping suggestion is a very good one and one that I am comfortable doing.

Thanks for the help.