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Post by vance on Jan 19, 2018 16:54:10 GMT -8
What is a manifold diaphragm?
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Post by crabbyjim on Jan 19, 2018 18:23:03 GMT -8
I’ll get a slotted screwdriver tomorrow and try it.
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Post by crabbyjim on Jan 19, 2018 18:24:07 GMT -8
What is a manifold diaphragm? A misspelled word. Diagram.
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Post by cnotthoff on Jan 19, 2018 18:55:22 GMT -8
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Post by vance on Jan 19, 2018 19:18:40 GMT -8
Just get a weed puller and straighten it. Then, file a slot in it.
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Post by vance on Jan 19, 2018 19:25:12 GMT -8
Hey Crabby, Can you post a picture of your manifold? I think it is the same one I have, and mine leaks too.
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Post by nikeajax on Jan 19, 2018 19:29:00 GMT -8
Geez Phil, you can't tell people things like that: everyone knows home made tools will kill ya! I made a tool for my Olympic out of a hunk of iron strapping I pulled off of the ramada in my back yard when I disassembled half of it JB
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Post by vance on Jan 19, 2018 19:44:02 GMT -8
It's amazing what you can do with the stuff you got layin' around!
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Post by crabbyjim on Jan 19, 2018 19:58:41 GMT -8
USD 1/2 inch pipe thread, circa 1960. Steel bushings would be nice to have in reserve.
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Post by nikeajax on Jan 20, 2018 9:10:14 GMT -8
And don't nobuddy make one of these neethur, cuz it's quadruple patented JB
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Deleted
Deleted Member
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Post by Deleted on Jan 20, 2018 11:29:13 GMT -8
I'm guessing they meant the top would shear off from the threaded portion in the cylinder. Personally, I would use a six point socket and breaker bar in this instance. If it shears off with full hex contact and even torque, then it was just meant to be. I don't know if an impact wrench would help get it started, or just shear it off. Have fun! The shop was just exercising caution. With a bigger wrench they came right off. When it comes to mechanical energy...bigger is always better.
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Post by cnotthoff on Jan 22, 2018 10:13:37 GMT -8
Schematic shows a manifold for a 3/4" cylinder neck. The internal workings of this era valve are the same as for your 1/2" mpt manifold. USDman by Charlie will, on Flickr Good Dives, Charlie
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Post by crabbyjim on Jan 22, 2018 11:27:12 GMT -8
Thanks, Charlie!
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Post by nikeajax on Jan 23, 2018 14:05:19 GMT -8
Crabby and Phil, I was thinking what if you guys put a very thin coat of RTV where the two parts of the manifold meet up? Not a lot would be needed! Also, you would want to get things only finger tight until the RTV has cured, then once cured, you could torque the connections down... You might also try polishing the connections if you'd rather not use the first method JB
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Post by SeaRat on Jan 23, 2018 18:19:46 GMT -8
Crabby and Phil, I was thinking what if you guys put a very thin coat of RTV where the two parts of the manifold meet up? Not a lot would be needed! Also, you would want to get things only finger tight until the RTV has cured, then once cured, you could torque the connections down... You might also try polishing the connections if you'd rather not use the first method JB I WOULD NOT use RTV for these valves. Here is the Material Safety Data Sheet for RTV: www1.mscdirect.com/MSDS/MSDS00023/52438462-20160220.PDFNote the composition: 11% amorphous silica 2% Methyltriacetoxysilane* 2% Ethyltriacetoxysilane* *Comments: Acetic acid is formed upon contact with water or humid air. Provide adequate ventilation to control exposure within guidelines of OSHA PEL: TWA 10 ppm and ACGIH TLV: TWA 10 ppm, STEL 15 ppm. Amorphous silica sometimes has contamination with crystalline silica, which can cause silicosis and lung cancer in the lungs. Even without contamination there is some evidence of lung fibrosis from the amorphous silica. Acetic acid is not good to breath either. These valves are made to be a metal-to-metal connection. Remove all corrosion, and polish the two connection areas, then simply put them together and tighten very tight (large wrench). Any material put against the metal-to-metal connection can not only cause contamination of the air, but also corrode the metal, thereby actually damaging the valve's surfaces. John PS--I'm using my industrial hygiene background here, as this can cause problems.
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