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Post by vance on Dec 28, 2021 16:15:52 GMT -8
Since the 400/800 pin and support are permanently attached to each other, I’m not going to mess with it. ? That is not my experience with the pin and carrier. I hope not to misspeak, but that doesn't seem to be correct. I will have to disassemble one of my undisturbed regs. It might be a tight fit?
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Post by nikeajax on Dec 28, 2021 16:35:12 GMT -8
I think what our friend Art may have is one of the "ball and socket" types of thrust-pads. The push-rod has a ball at one end that fits into the thrust-pad...
JB
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Post by artc on Dec 28, 2021 17:30:29 GMT -8
The Dacor service manual shows MR108 pushrod assembly as one unit. If it can be separated that’s great. I have pins that I can trim to fit a A213 hp seat. I’ll find out for sure when I disassemble the reg. I have a Conshelf VI that had the pin and pin support connected as one unit. Try as I might, I couldn’t separate the two. The original seat leaked badly and couldn’t be salvaged by polishing. So I replaced the pin/support assembly and seat with new ones from a Conshelf XIV and the world was right again.
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Post by herman on Dec 28, 2021 18:42:51 GMT -8
Don't try to "cut" any of the pins with wire cutter, as I said before they are hard. You will likely damage your cutters and/or mess up the pin. The best way to cut a pin is to use a Dremel with a cutoff wheel to a length that is a little longer than you need then trim it to length by grinding off the end with the side of the cutoff wheel.
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Post by artc on Dec 28, 2021 19:06:36 GMT -8
Thanks Herman, you’re spot on and I’m in awe of your vast knowledge. Thanks to you, I’ve been able to rebuild my RAM and use it as my go to reg.
Yes, I use my Dremel for all my delicate projects. My shop is set up for rebuilding automotive and marine engines, so I’m pretty well set up with tools and precision instruments to do the job. Over the years, I’ve collected a number of pins and supports from US Divers regs that I might try to use. I don’t plan to modify any of the original 400/800 parts, so if I can’t get the Trident A213 to work, I’ll just put the original hp seat back in the reg after polishing it.
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Post by vance on Dec 28, 2021 19:46:27 GMT -8
Try as I might, I couldn’t separate the two. I have experienced that as well with the Conshelf regs. I have not had that problem with Dacors, though. I don't see why you can't use any pin pad and pin, as long as they fit.
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Post by spirou on Jan 16, 2024 12:13:53 GMT -8
Hello, I just finish this Olympic 400, I just changed the O ring of the plug of the reserve, and the one on the second stage. The second stage diaphragm in rubber is tired I used the one of an XP to make test. No leak and it breath correctly. I set the IP on. 115 psi. BTW it is also a roll pin. IMG_20240116_163323_659 by Patrick Michel, sur Flickr IMG_20240116_174944_095 by Patrick Michel, sur Flickr Cheer's Fred
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Post by SeaRat on Jan 16, 2024 13:03:25 GMT -8
The IP may need to be a bit higher than 115 psi for optimal breathing. In a post earlier, 140 psi was mentioned. So experiment with bit, and if it will take a higher pressure and not leak, use it.
John
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Post by antique diver on Jan 16, 2024 14:59:37 GMT -8
Hello, I just finish this Olympic 400, I just changed the O ring of the plug of the reserve, and the one on the second stage. The second stage diaphragm in rubber is tired I used the one of an XP to make test. No leak and it breath correctly. I set the IP on. 115 psi. BTW it is also a roll pin. IMG_20240116_163323_659 by Patrick Michel, sur Flickr IMG_20240116_174944_095 by Patrick Michel, sur Flickr Cheer's Fred A caution about the roll pins. Some steel ones that were not Stainless Steel found their way into regulators when the Pacer series came out. I discovered one during a routine overhaul of a Pacer first stage that was close to breaking from serious corrosion. It was definitely not SS. I immediately contacted Dacor about it and they just semi-rudely blew it off, saying that was a maintenance issue and the user or dealer (me) was to blame for the corrosion. What a line of CRAP! At least I never ran into another one, so they were probably rare.
Some months later Dacor finally issued a bulletin addressing the fact that a "few" non-Stainless roll pins had been accidently placed in service, and we should test the pins of all Pacers coming in for service with a magnet.
There is a rare chance that type of pin may have shown up in their service parts or kits, so if you have any Dacor with a roll pin check it out to be sure it's SS! If that pin breaks it's NO AIR delivery.
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Post by SeaRat on Jan 16, 2024 16:42:29 GMT -8
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Post by vance on Jan 16, 2024 16:42:29 GMT -8
I agree about a higher IP. 135 psig is my go-to number. These are great regulators, and I hope the lack of replacement parts doesn’t keep some of them from being used. The ring filter, hp and lp seats aren’t available as far as I know.
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Post by SeaRat on Jan 16, 2024 16:45:57 GMT -8
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Post by artc on Jan 16, 2024 18:08:40 GMT -8
The 400/800 regulators are easy to rebuild. I recall getting a hp seat from Trident, all all the rest of the parts are easy to find and easily replaced. I have a 400 that I use regularly. It’s an easy breather.
just checked it. It’s got a primary, safe second and inflator for dive charter approval. It’s working great.
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Post by spirou on Jan 16, 2024 21:18:00 GMT -8
Hello Here is the page from the dacor manual, with the IP for Olympic line. I use 115 psi to have a good high lever, with xp diaphragm, I must investigate to have a good lever high. I look about that after winter holidays, I go to French Alpe next week. BTW , I don't dive last weekend the dacor 2020 because not possible to hook on my twin with a back up regulator on the second valve, due to the fix hook of the 2020. Screenshot_2024-01-17-05-57-07-486~2 by Patrick Michel, sur Flickr Cheer's Fred
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