Scuba Pro Mk20/25 convertion with DIN-Recall?

[AA3JY]

I bought a Mk20/25 with DIN fitting converted version on eBay, as my back up reg., and had it serviced at a local authorized Scuba Pro dealer. However during skills training in a pool I developed a slow leak from my 1st stage. I returned to my original dealer and discussed the situation that I had while in the pool as I was preparing for a trip to North Fla. cave country and didn't want this to occur at an inappropriate moment in an overhead environment. All-in-all they found nothing wrong. So I went to another shop who's also an authorized Scuba Pro dealer and showed them the reg and they immediately determined that the aluminum DIN fitting has a recall and is to be replaced with a S.S. DIN fitting. Also it was found that an additional 'O' ring had been added thus preventing the DIN fitting to fully seat in the 1st stage body.

My question being the fact as a consumer we can not service our own Scuba Pro regs., unless affiliated and trained with an authorized dealer... where on the internet can I find the recall of this particular item(s) and are there other items concerning this converted version of the Mk20/25 version that I should be aware of?

Thanks,

Clay AA3JY
Kimberton,Pa.

 

[chrpai]

Google "mk20 recall" and the first hit is:

CPSC - Scubapro® Recalls MK 20 Scuba Regulators for Service

You're regulator sounds like it's actually an MK20 that has had some parts upgrades to bring it up to MK25 feature level ( mainly externally adjustable IP )

I have a similar reg except mine is yoke. I had the yoke retainer and saddle replaced by a dealer for free. Eventually I might get the DIN conversion or I might just buy another DIN regulator.

BTW, it sounds like the tech at the first LDS has their head up their rear. I would trust the opinion of the second tech much more.

FWIW, a lot of people believe the recall was an engineering revision to compensate for idiot techs who don't know how to or care to properly use a torque wrench. Otherwise you've got a perfectly good first stage. I use one on my pony / stage.

 

[redacted]

I'd have my doubts about both shops. The Mk20 recall had nothing to do with aluminum vs SS materials. It was simply a poor design on the din/yoke retainer. And the Scubapro din retainer does have a groove that will accept an o-ring (I think it is an 015) that does little more than hold the handwheel in place when the retainer is not attached to the body. Some schematics will show it and others do not.

Scubapr does not prohibit you from servicing your own regulator. But in the USA they seem to do what they can to make it as difficult as possible.

Scubapro recalls: SCUBAPRO - Product Support

 

[AA3JY]

We're getting closer to my problem/situation.. I recall after the original leak that the retaining DIN hand wheel was very stiff and had very little movement/play on the DIN fitting and I brought that to the attention of the first shop. They replied and showed me the Scuba Pro's repair manual for the correct torque values which they said they accomplished.

The second shop indicated upon looking at my reg that the DIN fitting was aluminum(painted in black) and due to the possible corrosion factor of dissimilar metals thus Scuba Pro replaced it with a stainless steel version(stainless in color) for free. Which by the way they did call Scuba Pro to verify this while I was at the shop. As AWAP mentioned that there is a grove on the DIN retainer that will accept an 'O' ring and I was advised by the second shop that this may be why the DIN hand wheel was stiff with little freeplay and also might be the cause as to the leaks as the DIN retainer did not fully set in the 1st Stage and possibly gave a false final ending torque value.

 

[redacted]

Your first shop definitely sounds like a problem. Schematics for the Mk20UL show a washer going on the din retainer before the handwheel. If they used an O-ring rather than a thin nylon washer, that would likely cause some binding, especially as it eats up that o-ring.

 

[Zung]

If you have an aluminum DIN adapter, either you trash it now, or you remove it and rince it with fresh water after every dive. I had one I did a couple of dives with, rinced without removing, and it got really stuck after a week. After I got it loose, half of the anodization inside the thread is gone!

 

[AA3JY]

If you have an aluminum DIN adapter, either you trash it now, or you remove it and rince it with fresh water after every dive. I had one I did a couple of dives with, rinced without removing, and it got really stuck after a week. After I got it loose, half of the anodization inside the thread is gone!

As mentioned previously the second shop replaced it for free curtacy by Scuba Pro..