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I can't screw
Posted: Sat Sep 22, 2018 5:55 pm
by ScubaLawyer
Re: I can't screw
Posted: Sat Sep 22, 2018 6:28 pm
by Herman
What you have is a MK-6. It is a MK5 with a special connection. It is spring loaded to initially close it but when you open the tank, it clamps tighter with the air pressure. To remove it, you close the valve, purge the reg then remove it against the spring pressure.
It might be bound up but you should be able to pull the yoke away from the main body (against spring pressure) enough to get it over a standard valve.
Re: I can't screw
Posted: Sat Sep 22, 2018 6:34 pm
by ScubaLawyer
Herman wrote: ↑Sat Sep 22, 2018 6:28 pm
What you have is a MK-6. It is a MK5 with a special connection. It is spring loaded to initially close it but when you open the tank, it clamps tighter with the air pressure. To remove it, you close the valve, purge the reg then remove it against the spring pressure.
It might be bound up but you should be able to pull the yoke away from the main body (against spring pressure) enough to get it over a standard valve.
Thanks Herman. I knew someone would know.
Re: I can't screw
Posted: Sun Sep 23, 2018 3:59 pm
by couv
I tried to attach a couple of files, but could not due to invalid file extension. (pdf) I'll try to email them to you.
The MK6 is an interesting and unique first stage and a nice collectors item. But I would not do any serious diving with it. I used to have a one. Even after rebuilding it (including the pneumatic yoke) I found it disturbing that I could unseat it with a pull or bump when the tank pressure was below 1000 psi.
Re: I can't screw
Posted: Sun Sep 23, 2018 4:26 pm
by ScubaLawyer
couv wrote: ↑Sun Sep 23, 2018 3:59 pm
I found it disturbing that I could pull or bump the yoke when the tank pressure was below 1000 psi and unseat it.
Good to know! Thanks.
Re: I can't screw
Posted: Wed Sep 26, 2018 8:21 am
by antique diver
That might be the roughest looking regulator I have ever seen. I don't think you should put that into service with your cave diving kit.
BTW, the subject title made me think you had gotten bent.
Re: I can't screw
Posted: Mon Oct 22, 2018 9:59 pm
by kworkman
I remember reading some posts on another forum about several fatalities with this first stage and being the reason they stopped production on it. Even at 3000psi it is easy to disrupt the connection. Cool collector piece. Looks good in my case.
Re: I can't screw
Posted: Tue Oct 23, 2018 6:49 am
by rhwestfall
could make for a handy "shop reg"...