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Post by vance on May 17, 2018 14:58:52 GMT -8
Be aware that butyl rubber used in innertubes will degrade over time. However, it should last years. I think that neoprene is better, and a gasket made from silicone sheet will last a lifetime. BTW, I took my HTII apart and the gasket was fine. I reused it w/o problems.
Back in the'70s I had a '56 Studebaker pickup truck with a Lark engine and tranny. It was the envy of all my friends. It was called the "Stud Maker". Pls remember we were young...
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Post by nikeajax on May 17, 2018 15:37:36 GMT -8
Hopefully before I'm too old, I'll bring this to one of our vintage scuba meets:  My '56 Buick Century  JB |
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Post by tomcatpc on May 17, 2018 17:32:17 GMT -8
Jays method of fixing BC bladders with inner tube pieces works... I have a mid-70's Sportsways Horse collar to prove it.
Should have keep my gob shut about the truck. The only vintage car I own now is '46 Crosley Station Wagon I inherited from my Dad. Would make a decent "cruise around the Key's" dive car if I took the back seat out. Not sure I'd take it out on the 405 though?
Mark
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Post by nikeajax on May 17, 2018 17:50:50 GMT -8
Jays method of fixing BC bladders with inner tube pieces works... I have a mid-70's Sportsways Horse collar to prove it. Should have keep my gob shut about the truck. The only vintage car I own now is '46 Crosley Station Wagon I inherited from my Dad. Would make a decent "cruise around the Key's" dive car if I took the back seat out. Not sure I'd take it out on the 405 though? Mark Mark, seeing that it's such a bee-hive of activity 'round here (not) I'm glad you did. No s**t, a Crosley? Dang that's one funky lookin' little car, and totally cool!  JB |
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Post by Aquala1 on May 17, 2018 21:20:52 GMT -8
Let’s see it Mark!
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Post by snark3 on May 19, 2018 8:03:23 GMT -8
Ok guys, so this thread got me motivated to get my New England Divers Hydro twin back in the water. I took it apart last night and as I suspected I got to the point where I have a few more questions. 1) It appears to have a rubber gasket around the volcano orifice. Can anybody confirm this before I try to remove it and screw something up. 2) Can I leave the second stage plunger in the housing and just replace the "button"? Thanks in advance guys.
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Post by nikeajax on May 19, 2018 9:04:36 GMT -8
Yes, leave the valve-seat in, the o-ring is usually are good even after all these years. here's Phil're images:   There's a size-1 o-ring in the seat stem guide that the plunger shaft fits into, replace that!!!!! JB |
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Post by snark3 on May 20, 2018 13:55:19 GMT -8
Thanks JB for your response. I think I may have asked something incorrectly. The images of Phils that you referenced I think are first stage of a Hydro Twin II, I'm curious about the second stage on a Hydro Twin (unbalanced version). The closest thing I can find is the tilt valve gasket (item 78) on the exploded view. I know mine doesn't have a tilt valve but its the closest I can find. I took a pic but I'm having trouble uploading it.
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Post by nikeajax on May 20, 2018 14:51:53 GMT -8
Believe it or not, the Healthways Scubair, original model, share some of the same parts--REALLY!  The first stage of my Navy Unit should look a bit familiar to you too:   The Navy Unit and Scubair used many of the same internals, which is what you have in your HT: the seats and plungers are 100% interchangeable between the two: does this help? JB EDIT: please read on how to post and image: vintagescuba.proboards.com/thread/3622/post-image |
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Post by vance on May 20, 2018 15:22:15 GMT -8
This will be what your HT internals will look like, with the exception of the reserve button shown between the filter and the spring. Same plunger and seat, and maybe the same spring. 
Push the volcano orifice out with a piece of wooden dowel and replace the o-ring around it. No reason not to.... |
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Post by snark3 on May 21, 2018 12:36:38 GMT -8
Yup Phil that's what mine looks like. I did a little picking this morning and got the gasket out that I was asking about. It looks like the washer USD used on their early valves (later replaced by o rings) will work if I can make it thinner. I'll also check around to see if I can find something that will work without modification.
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Post by vance on May 21, 2018 13:25:24 GMT -8
Yup Phil that's what mine looks like. I did a little picking this morning and got the gasket out that I was asking about. It looks like the washer USD used on their early valves (later replaced by o rings) will work if I can make it thinner. I'll also check around to see if I can find something that will work without modification. So yours is a tilt valve second stage like the diagram on pg 1 of this thread? |
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Post by snark3 on May 21, 2018 13:49:27 GMT -8
Mine does not have a tilt valve I don't think. Please keep in mind I'm a rookie at this, but the second stage on mine looks similar to a DAAM setup. It has a horseshoe type item that contacts the diaphragm and actuates a second stage plunger which again is very similar to a USD.
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Post by vance on May 21, 2018 15:18:19 GMT -8
I wish we had a real diagram of the Hydro Twin and HTII. I've been unable to locate one. Please post pics! We've documented the HTII pretty well on the forum, but pics of the HT would be awesome. Go to my post (on the link JB sent) under the picture of my Scuba Deluxe. That is the easy way to post Flickr images. No need to type anything, just cut and paste. A Flickr account is free and easy to do.
A tilt valve will be be piece of wire with a curl at the end, I think. Anything with a sheet metal horseshoe or lever like JBs pic on pg1 and having a USD-like seat is going to be a downstream setup. Tilt valves are both seat and lever in one, and they simply rock back and forth to open and close.
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Post by SeaRat on May 21, 2018 15:44:37 GMT -8
Vance, I have previously posted this image/parts diagram of the Hydro Twin regulator, but I think it was lost to the PhotoBucket debacle. Here it is again:  I also can get the parts diagram for the Duel Air, as it is in my copy of Fred Roberts book, Basic Scuba. Here is a breakdown of my Sportsways Sport Diver regulator, showing the tilt valve.  If any of you want to PM me with your e-mail, I can drop you a PDF copy of The Journal of Diving History, Fall 2013, Vol. 21, Issue 4, Number 77, which has a very good article on the history of the Sportsways double hose regulators (Duel Air, Hydro-Twin and Hydro-Twin II). It also has first stage operational diagrams in it. Actually, I just remembered I could get a screen shot of this page, and post it below. This is from a Skin Diver Magazine ad for the Hydro-Twin II:  John |
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