Joining the 109 Club

[James Sizemore]

I just received my eBay purchase of a mk10 and 109 regulators to use as my pony bottle set up. I have disassembled both and cleaned all parts with simple green. I am a bit confused on upgrading it to balanced adjustable. Would some one walk me through that? I have read through some of the other forums about what others have done, its seems that everyone has got their own way to do it.

 

[LeadTurn_SD]

Welcome to the "club".

Go here for the conversion parts to make your -109 a Balanced Adjustable, for the price of $40, and also any other bits and pieces that might need replacement:

http://vintagedoublehose.com/store/...sion-Viton-option/p/35112446/category=3500128

There are some great folks on this board, aka "the usual suspects", who can help with advice if needed.

Best wishes.

 

[halocline]

You're going to love this 2nd stage, in fact, it's a real shame to relegate it to pony use, especially if you convert it to balanced. But, here's how you do it.

You need:
s-wing poppet assembly, 11250015 (I'm reading part numbers from the G250V schematic)
balance chamber 11150102
spring 01020216

Then you need 2 o-rings, a 902 for the orifice and a 011(I think) for the adjusting knob.

Assembly is very straightforward, just watch out for the lever/poppet compatibility issue which comes up from time to time. There are a few excellent threads about it.

 

[James Sizemore]

Once all is said and done, Ill compare it to my g500, my current primary, and see what is worth keeping where. I like the idea of having the metal regulator to collect come moisture.
The poppet is one of the things that concerns me. So attached is the poppet that came out. I believe that this is the older style poppet, is that correct?

 

[rhwestfall]

all with a caveat that the lever may or may not work happily....

If you find that you get "click - pause - woosh" on an inhale, the lever needs to be replaced with a G250V lever....

 

[James Sizemore]

Alright. I just started my order with Vintage Double Hose to get a mk10 service kit, and the 109 upgrade kit with viton orings. And it sounds like I have to rebuild before I know if the lever works properly with everything. Is the lever just random, or were there certain years that did or did not work properly?

 

[rhwestfall]

random.... I have had some simply work, and others just not behave....

 

[James Sizemore]

Great. Now if only I could get my parts today while I have the motivation to work on things.

 

[James Sizemore]

Also waiting on my new book "SCUBA Regulator Maintenance and Repair"

 

[Bob DBF]

I love the 109, and have serviced and use several of them, both balanced and unbalanced, but have yet to have any of them on a ScubaPro 1st. Is this a faux pas?


Bob