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Post by duckbill on Apr 24, 2017 19:23:57 GMT -8
Look in the threaded portion of the "T". Is there a slotted fitting? There should be. And once it is unscrewed you would find a spring and seat with a small steel ball that seals the reserve pressure. Along the way through the decades, people often disabled the valves by removing that seat when J valves fell out of favor amongst the lesser experienced.
IIRC, there should also be a stem seal that I don't see in your photo. It may still be in the bonnet nut.
I also recall there being a cup that goes over the larger spring under the stem nut.
I'm sure someone will post a diagram for you.
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Post by tomcatpc on Apr 24, 2017 20:12:23 GMT -8
I recall seeing "something" in there, but don't recall the slotted fitting. Of course I'll go down and look at it after this... I hope all the reserve parts are still there! I'm sure I'll have more to ask as time goes on with this project. Mark
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Post by tomcatpc on Apr 24, 2017 20:38:59 GMT -8
OK...took another look and lo and behold there was no slotted fitting. However, the "air hole" just inside the concave opening was a "hex shape". Just so happened that it fit an allen hex key just perfect. I was able to unscrew and remove that piece and out came a spring and a seat.
I will clean up these "newly discovered" parts and post another photo in a day or so.
Is the stem seal a white plastic washer type piece? If so, yes it is present in the bonnet. Mark
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Post by SeaRat on Apr 24, 2017 21:23:38 GMT -8
Good, you found it. I said that an Allen wrench was needed, saying that was from memory, and I guess I was right.
John
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Post by duckbill on Apr 24, 2017 22:51:31 GMT -8
Yep. That's it. I thought it was slotted, but now that you mention it I remember using a hex wrench. OTOH, I do remember using a slotted screwdriver for some seat somewhere. Maybe I'm thinking of the burst plugs. I guess I'm losing it. But, at least I can say, "Haha! Made you look!"
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Post by tomcatpc on Apr 25, 2017 11:19:09 GMT -8
Now, the burst discs, like you said, were a slotted fitting. And both came out with little drama, much to my relief!
I knew there was "more to" the reserve and I could see "something in there", but did not know what. Thanks for the help! Mark
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Post by tomcatpc on Apr 27, 2017 19:31:57 GMT -8
Here is an updated photo of the inside parts of the reserve side of the manifold. The three parts that were "hidden" inside are on the left. Also "rediscovered" are the broken, petrified remains of the O-Ring on the lower right of the photo. From what I can tell, the seating surface looks to be alright, at least from what I can tell. Mark
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Post by cnotthoff on Apr 28, 2017 15:20:36 GMT -8
Mark, that was never an o-ring. It was a hard plastic seal with a square cross-section. Any o-ring will extrude when you tighten that brass fitting. Send me your shopping list and I'll see what I have. Make sure you tease out the fiber washer that was under the burst disk, careful not to scratch the surface.
I see you caught the pictures of our yard sale. That was only the front yard, and we have more. Most of Dad's collection predates scuba.
Good Dives, Charlie
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Post by tomcatpc on Apr 28, 2017 19:30:12 GMT -8
I don't foresee getting this project further underway until later this Summer, so when I need parts, I will contact you. I will see what I can get locally (if possible) from local dive shop, if not I will be asking for help.
As for the washer under the burst discs. I did not see anything like that. I will look again and see if they are still there? All I recall was the actual copper discs, and the screw heads openings. These were the "old type" that had a slotted flat blade screwdriver slot. Both came out fairly easy. They will be replaced with the correct modern burst discs. I will look again next time I work on it. Mark
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Post by tomcatpc on Jul 20, 2017 20:33:07 GMT -8
I was playing around tonight just to see how these might look on my Sportsways/Waterlung pack. I'm sure I'll need to do some adjusting, but these might not see the water for a year or so? I need a set of twin 72's like an Orangutan needs a checking account...! Mark
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Post by SeaRat on Jul 20, 2017 21:33:28 GMT -8
I was diving my twin 53s today, and I do like twin sets with double hose regulators. The regulator sits down lower, and breaths better because of it.
Concerning yours, I would consider getting one more band if I were you. That would take pressure off the manifold when you move the set.
John
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Post by tomcatpc on Jul 20, 2017 21:54:12 GMT -8
I had thought of getting an additional band. It might be some time before these see any action. I'd love to have a smaller set of twins, it make more sense for the sort of diving I do. Mark
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Post by duckbill on Jul 21, 2017 8:29:50 GMT -8
Don't forget to add a hand truck to your dive equipment list.
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Post by tomcatpc on Jul 21, 2017 10:03:12 GMT -8
That's what I'm scared of, seeing a lot of Divers where I live have more gear than Astronauts... I love diving with just a tank and reg., not sure a set of twins is an "improvement"? Ha ha! Mark
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Post by duckbill on Jul 21, 2017 11:18:31 GMT -8
not sure a set of twins is an "improvement"? Well, as John said, doubles do help to get the regulator just that much lower, so there is some advantage. I love my 38s and 50s. But, you have to factor in double the price for hydros and visuals, and then there are always those shops that try to charge you double for filling double tanks. There have been many times on trips where I have to talk to the shop owner and point out that both tanks put together hold less than most singles today, are low pressure, and have a single yoke fitting, so it amounts to no more than a single fill. It's a hassle, but they always come around. Double 72s, though, add even more to the mix. You have to keep current on your insurance, and be willing to be down for the period following the inevitable hernia repair. I just had one done, so I'm a bit sensitive about this issue right now. The only way I can see diving twin 72s is if I can strap them on in the water. But even then I don't have a practical need for that much air for the diving I do.
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