Scubapro MK2Plus

[yak]

So I'm getting ready to dive a cenote 2 weeks ago, and my regulator starts hissing like crazy when I hooked it up. Turns out my yoke retainer nut was loose. I was diving with Diablo Divers, and my guide, Dennis had the right size socket but no extention, so we jerry-rigged a paddle-bit in the socket and used a crescent wrench to snug it up. It was fine during the next two dives.

So now I'm home, and I take it to my local authorized Scubapro dealer to make sure that it's torqued correctly. The kid who opened up the shop told me they just snug them up with a socket wrench. I asked him how much torque does it require, and he said you can't tighten them too much or they'll crack. Exactly, Einstein, hence the use of a torque wrench.:shakehead So I just took my reg and left.

Does anyone know what the spec is for torqueing this nut down? I'm also looking for a source for a shallow 1" socket to add to my toolkit.

 

[DA Aquamaster]

The SP approved range is 20 to 25 lbs on all their yoke and DIN retainers. I split the difference and use 22 lbs. I have never had a problem with them coming loose at 22 lbs and you won't crack or stretch anything.

Good call on taking your reg and leaving - if you ever go back to that shop I'll be really disappointed with you.

If you get a chance, report your experience to Scubapro directly as they are trying real hard to prevent that sort of technical incompetence - especially after the Mk 20 fiasco.

 

[yak]

The SP approved range is 20 to 25 lbs on all their yoke and DIN retainers. I split the difference and use 22 lbs. I have never had a problem with them coming loose at 22 lbs and you won't crack or stretch anything.

Good call on taking your reg and leaving - if you ever go back to that shop I'll be really disappointed with you.

If you get a chance, report your experience to Scubapro directly as they are trying real hard to prevent that sort of technical incompetence - especially after the Mk 20 fiasco.

Thanks.

To be fair, I am going to speak to the shop owner, who was not present at the time. And I'll quiz the guy later in the summer to see if he "got it". (They're the only shop close to me that fills EANx, so I go there a lot).

I may end up trying to order a socket online from somewhere. Can you confirm that it's a one-inch?

 

[DA Aquamaster]

Thanks.

To be fair, I am going to speak to the shop owner, who was not present at the time. And I'll quiz the guy later in the summer to see if he "got it". (They're the only shop close to me that fills EANx, so I go there a lot).

I may end up trying to order a socket online from somewhere. Can you confirm that it's a one-inch?

Yes it will need a one inch yoke nut socket.

Peterbuilt sells one for $20.00 on their web site:

http://www.scubatools.com/PBUniversal.html

It is 3/4 of the way down the page and is part number 20-155-500.

The sockets are a little thinner walled and a lot shorter than normal 1" sockets to allow them to fit between the yoke and nut. You cna turn down a regular 1" socket but it is a fair amount of work and the Peterbuilt socket is well made and worth the $20.00.

Peterbuilt is a great site for lots of specialty scuba tools so it's probably a good opportunity to stock up with what you need and save on shipping.

 

[yak]

thanks again!

 

[oxyhacker]

I hope someone at some point undid it all the way and took a look at the O-ring to make sure it wasn't damaged and that it was correctly seated, before tightening down the retainer.