Fossil_Diver
Contributor
Holy Nordic nightmare Batman! What kind of engineering Joker designed the sensitivity switch on the Jetstream second stage?
So, my Jetstream was breathing wet. It wasn't difficult to determine the source of the leak. It was the sensitivity switch. No problem, easy fix. I get a new switch and o-ring but the switch didn't come with the little metal fastener that holds it in place. Ok, I'll just carefully remove the old one and reuse it. Removing that fastener without mangling it beyond recognition was a lot easier said than done.
I put the switch back together but it still leaks. No matter how hard I push that fastener down over the switch post it won't hold the switch down tight enough to compress the o-ring and keep it from leaking.
Yankee enginuity to the rescue! I dig through my box of o-rings and find one that is just slightly thicker than the OEM one that came with the switch. I straighten the fastener back into shape with a flat punch and hammer because by now it had been a little, er, a lot bent up by me removing it twice. I push the fastener back in place over the post using a small socket from my wrench set and viola! It is nice and snug, the switch slides smoothly yet firmly and best of all it doesn't leak. Hooray for me! (I made it sound easy but it was anything but, I did a lot of cussing)
What I would like to know is what engineer thought using that cheesy piece of tin for a fastener was a good idea? It is destined to work loose and/or the o-ring will eventually start leaking and there is no practical way to tighten it back up without performing something akin to open heart surgery.
It could have been designed using a screw to hold it together so that servicing it would be easy. After having the pleasure of doing this "simple" fix I understand why none of the LDS in my area will service Poseidon regs, and I live in a diving mecca with more dive shops than 7-11's.
Well, that's my rant for the day. With any luck I hope none of you folk have to replace your sensitivity switch o-ring anytime soon, it's no fun. It was such a PITA that I was damn close to just getting rid of the switch and putting a piece of duct tape over the hole. No kidding.
Have a good weekend everybody!
So, my Jetstream was breathing wet. It wasn't difficult to determine the source of the leak. It was the sensitivity switch. No problem, easy fix. I get a new switch and o-ring but the switch didn't come with the little metal fastener that holds it in place. Ok, I'll just carefully remove the old one and reuse it. Removing that fastener without mangling it beyond recognition was a lot easier said than done.
I put the switch back together but it still leaks. No matter how hard I push that fastener down over the switch post it won't hold the switch down tight enough to compress the o-ring and keep it from leaking.
Yankee enginuity to the rescue! I dig through my box of o-rings and find one that is just slightly thicker than the OEM one that came with the switch. I straighten the fastener back into shape with a flat punch and hammer because by now it had been a little, er, a lot bent up by me removing it twice. I push the fastener back in place over the post using a small socket from my wrench set and viola! It is nice and snug, the switch slides smoothly yet firmly and best of all it doesn't leak. Hooray for me! (I made it sound easy but it was anything but, I did a lot of cussing)
What I would like to know is what engineer thought using that cheesy piece of tin for a fastener was a good idea? It is destined to work loose and/or the o-ring will eventually start leaking and there is no practical way to tighten it back up without performing something akin to open heart surgery.
It could have been designed using a screw to hold it together so that servicing it would be easy. After having the pleasure of doing this "simple" fix I understand why none of the LDS in my area will service Poseidon regs, and I live in a diving mecca with more dive shops than 7-11's.
Well, that's my rant for the day. With any luck I hope none of you folk have to replace your sensitivity switch o-ring anytime soon, it's no fun. It was such a PITA that I was damn close to just getting rid of the switch and putting a piece of duct tape over the hole. No kidding.
Have a good weekend everybody!
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