Question Scubapro R109 and MK5 Parts

[Angelo Farina]

And here the G250V-G260 service kit, which fits the R109 if converted to "balanced", as almost all are nowadays:

www.vhsmd.com

www.vhsmd.com

 

[aquaregia]

If your 109 poppet takes the puck seats, you can use a leather punch and a strip of EPDM to make them, as long as you don't want to convert to balanced.

 

[raftingtigger]

Almost all the service parts are O-rings except the HP seat. Aftermarket HP seats are readily available. My favorite place for anything O-rings is www.theoringstore.com. There are annotated assembly diagrams for the MKV, 109, et. al. and you can find the right O-ring sizes there.

As for the 109 poppet seat, they are easy to make (see aquaregia) earlier. I also DIYed a brass collar to keep the poppet seat in place. It is in a thread on the subject somewhere. I made a lifetime supply about 6-7 years ago, so have forgotten the details.

Exhaust Tees are very easy to make serviceable ones. I just use a piece of clear vinyl tubing with a hole just big enough for the metal flange. Stays on WAY better than the aftermarket silicone ones.

One-way exhaust valves are common items. 2nd stage diaphragms are likely common also, but I bought a lifetime supply and haven't looked lately. No, none of it is for sale. The diaphragm cover is easily DIYable - I made mine by casting, but 3D print with TPU would be a much better way to go.

 

[AdaptedEngineering]

To pile on - I have acquired a Mk5 & 109 in apparently decent condition, and would like to embark on the DIY project to get these back into serviceable status. Thanks to the wealth of online information available, I believe I will need the thing called a duro poppet because mine has an older non-serviceable poppet style, as well as the assortment of O-rings to replace.

Because I am new to the forum and unable to PM, I post this for @buddhasummer, or maybe anyone else with some stock of regulator soft parts needing a willing buyer.

I also understand that @herman makes some special tools for servicing these regulators, which I am also in the market for.

Thanks in advance!

 

[herman]

I use to make several tools to help with the installation of the oring but have been out the tool business for a few years. It can be installed with a couple pieces of wood, the tools just made the job a lot easier.

 

[AdaptedEngineering]

I use to make several tools to help with the installation of the oring but have been out the tool business for a few years. It can be installed with a couple pieces of wood, the tools just made the job a lot easier.

Thanks for the quick response! When the time comes I'll be testing my cleverness and dexterity for the initial attempt. I do see a commercial source of something like you describe, which I may take the option on, in the case I end up doing this habitually.

 

[axxel57]

To pile on - I have acquired a Mk5 & 109 in apparently decent condition, and would like to embark on the DIY project to get these back into serviceable status. Thanks to the wealth of online information available, I believe I will need the thing called a duro poppet because mine has an older non-serviceable poppet style, as well as the assortment of O-rings to replace.

Because I am new to the forum and unable to PM, I post this for @buddhasummer, or maybe anyone else with some stock of regulator soft parts needing a willing buyer.

I also understand that @herman makes some special tools for servicing these regulators, which I am also in the market for.

Thanks in advance!

As mentioned before, I have plenty of used parts in different conditions for ( I guess) all Mk5-109 models.

So if you don't have luck with @buddhasummer or somewhere else closer to you, you still can shoot me a message, I can help with parts, tools and Service kits (as far as still available), but it comes from Europe.....

 

[James79]

Thanks for the quick response! When the time comes I'll be testing my cleverness and dexterity for the initial attempt. I do see a commercial source of something like you describe, which I may take the option on, in the case I end up doing this habitually.

Sending a DM shortly.

 

[AdaptedEngineering]

@axxel57 I'll let my inquiry soak in a little bit before springing for international shipping - I don't think I can send you a message until I get some posts into the forum - hopefully my responses to DM's I received so far are going through. In the mean-time, I have some parts cleaning and O-ring shopping to do!

 

[AdaptedEngineering]

Took a dive with my rebuilt mk5/109 - and I apparently survived! Thanks to the assistance I got here, and the helpful videos made by the vintage double hose people. Good times!

I did find some corrosion on the lever, visible in the attached photos:

probably due to being stored with a bit of salt captured at the interface between the lever and diaphragm disk. I cleaned the area up and applied a bit of silicone grease to hopefully prevent corrosion.

Any tips on how to prevent this kind of thing? I generally rinse gear in fresh water, and give them some opportunity to dry out.