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Post by crabbyjim on Mar 7, 2018 17:23:44 GMT -8
I'm coming down tomorrow, but have no dive plans. I've got a couple of projects to finish and more wedding planning (oldest son in July). Is there somewhere I can drop off a couple of steel bushings? Good Dives, Charlie I will be at the Aquarium until one pm. If you are downtown, we can meet for lunch or you can drop them off at the Lighthouse Smokehouse BBQ.
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Post by crabbyjim on Mar 7, 2018 17:34:40 GMT -8
I had the HyroTwin II so the uncoolness of the DA was canceled out a bit with Sportsways elan and flair. Dah'zam straight boyeee, tha's what I'm talkin' 'bout dog! JB Did Phil mention his recent conversion from vintage horse collar to back mounted wing with power inflator?
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Post by vance on Mar 8, 2018 9:23:37 GMT -8
"Did Phil mention his recent conversion from vintage horse collar to back mounted wing with power inflator? " Yep. It's true. And will probably never go back. Soooooo much better and easier. The vintage part of my rig is the tank, regulator, gauges, and most vintage of all, me. I will always qualify as a vintage diver, no matter what! Or maybe even ancient mariner!
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Post by crabbyjim on Mar 2, 2019 14:13:52 GMT -8
Well, interesting afternoon with some, anyways. Jay and I spent a lot more time in the car than working on MR12s. We met up with CJ at our favorite Russian Louisiana-style BBQ restaurant and had lunch, then went to the Breakwater to look at the water and take some regs apart on the tailgate of CJs Tacoma. Not optimal, but not the worst place I've service a regulator. I took one of mine apart and inspected it under the very watchful eye of JB, and Jim went to school on me. I attacked the dreaded o-ring with a bit of trepidation, but got the little sucker in without too much bad language. It got put back together, hooked up, and IP set. Works. I should probably replace the seats. CJs reg then got the teardown. His was more corroded than mine, and needs a dip in the vinegar. It went home in a body bag. Here's Jim's: I have finally gotten around to re-assembling my MR-12 (serial number 46327). I am awaiting the rebuild kit that I just ordered and the pieces and parts are in a vinegar/water soak. While I was sorting through my stash, I found another one marked "Titan II, MR-12 in need of an exhaust diaphragm. Now I must find the assembly diagram (again). After re-reading Greg Barlow's post, it appears that I have an early model (Titan II) and a late model (serial number 46327) MR-12. I can hardly wait to try out my chicken-like, close motor skill on these. By the way, thanks to Jaybird I was able to easily remove the exhaust tee's via his hot water soak method. Thanks Jay!
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Post by SeaRat on Mar 2, 2019 15:02:56 GMT -8
"Did Phil mention his recent conversion from vintage horse collar to back mounted wing with power inflator? " Yep. It's true. And will probably never go back. Soooooo much better and easier. The vintage part of my rig is the tank, regulator, gauges, and most vintage of all, me. I will always qualify as a vintage diver, no matter what! Or maybe even ancient mariner! For a while in the 1980s I had the most unique, perhaps best, back-mounted BCD anywhere. If you look at this photo, everything on my wetsuit in white is BCD. Bill Herter, of Deep Sea Bill's fame (now deceased, unfortunately) built custom wetsuits, and then the whole back of the suit was a sandwich of two 1/8th inch neoprene pieces with the outer edge sealed with 1/2 inch strip neoprene. An inflator hose was built into the top of the wet suit too. This was the most comfortable, and streamlined, back-mounted BCD ever built, iMHO. This back-of-wetsuit BCD allowed very fine tuning of the buoyancy, and was a completely balanced system. By the way, I love my MR-12, and use it on my Trieste II as an octopus. The MR-12, MR-12 II, and MR-12 III are very good regulators. John PS, Photos by Bruce Higgins using my Nikonos II.
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Post by crabbyjim on Mar 20, 2019 11:25:38 GMT -8
Certainly unique. I think that a “u” shaped bcd would work better than the “donut” shape currently in use because the bouyancy would be at the midpoint of the body. Now, back to the MR-12. Would someone please post a video on how to rebuild these regulators? Phil, I have seen you take one apart. A video would be very helpful.
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Post by vance on Mar 20, 2019 12:02:01 GMT -8
Where are you hung up CJ? There is a special tool to take the HP valve out that makes things easier. I'm guessing you are talking about the first stage?
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Post by technidiver on Mar 20, 2019 15:15:39 GMT -8
I used pliers to get the HP Valve out. Just s pair of needle nose pliers with tale on the teeth and then I gave it a firm twist and poof it can't out. The MR12 definitely has a couple quirks in its design that make it tougher to assemble than another diaphragm reg. The Conshelf and Dacor 400/800 are my favourite diaphragm regs.
TD
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Post by nikeajax on Mar 20, 2019 16:01:17 GMT -8
CJ and Phil, I thunked I forced you two at gun point you two changed those o-rings out whilst we stood in the parking lot that day? Well one'o yous guys did anyways!
JB
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Post by crabbyjim on Mar 20, 2019 16:05:48 GMT -8
Where are you hung up CJ? There is a special tool to take the HP valve out that makes things easier. I'm guessing you are talking about the first stage? The tool is on the way. Figuring out how to use it should be fun. Maybe I should make a video, that would get a lot of laughs.
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Post by herman on Mar 20, 2019 18:00:53 GMT -8
Using the tool is no problem, just insert the pins in the holes and turn CCW to remove the HP assembly. No need to torque it down hard when you reassemble, the oring does the sealing, not how tight it is. The balance chamber oring is the PITA.
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Post by tomcatpc on Mar 20, 2019 20:20:27 GMT -8
Glad to see I'm not the only person who needed help with the Voit MR12! Think I got it sorted out and this Summer it might get to "live up to the hype" I've heard about this reg.! Mark
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Post by vance on Mar 20, 2019 20:45:43 GMT -8
Where are you hung up CJ? There is a special tool to take the HP valve out that makes things easier. I'm guessing you are talking about the first stage? The tool is on the way. Figuring out how to use it should be fun. Maybe I should make a video, that would get a lot of laughs. Check your email, CJ.
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Post by snark3 on Mar 23, 2019 6:28:19 GMT -8
I was looking through the illustrious box of junk I picked up. There are 2 MR12 second stages in there. They appear to be complete except for the diaphragm. Maybe I need to find a first stage. One cool thing about them is the serial numbers are 12028 and 12030. I think its cool they came off the line almost together and they are still together
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Post by nikeajax on Mar 23, 2019 8:07:07 GMT -8
Skip, if you do get a first stage for them, get the newer one with the upgraded yoke and 3rd LP port: the Scubamaster uses the very same first stage: If you don't know already, the original type of diaphragms on them can be dangerous because they cut corners and didn't rivet them in and will delaminate pulling the friction plate away. But, if that does happen, you can use the diaphragm to make an exhaust horn diaphragm for a model-A (original) scuba JB
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