Air2 2nd Generation Manual?

[Zung]

Sorry it's not pretty, but it's readable.

 

[Couv]

Sorry it's not pretty, but it's readable.

Thanks Brother,

That's as good as I have, I have not seen a decent copy of the AIR2 second gen.

The note about "remove thru exhaust valve hole" was a brain fart and should be deleted.

c

 

[redacted]

Thank you everyone for your replies.

I am hoping O-rings are all I need.

The case, covers and diaphragm look to be in very good shape.

Doc Ed, I will try some other shops but I was at Nautilus and Scubaworld and neither felt parts were still available. Of course, they did not really try that hard to check.

I took the unit apart and seems like a simple job to replace O-rings.

All of the o-rings are standard size and available from many o-ring suppliers. The seat is the same as is used in all Scubapro unbalanced 2nd, is also compatible with seats from other suppliers, and can be home made if all else fails. You don't need to find a Scubapro dealer to fill those needs.

 

[Zung]

... The note about "remove thru exhaust valve hole" was a brain fart and should be deleted.

c

This is correct in the sense: "remove [nut] thru exhaust valve hole".

 

[Zung]

I'm doing our 2 AIR2/III's right now (15 years overdue!).

I find the simplified procedure for tuning (preset the locknut until 2/3 threads show, and tune the orifice) doesn't work well, possibly because the 2 parts of the air barrel aren't screwed in tight in order to align the flat. When I turn on the air, the lever drops a bit.

The procedure described in Pete Wolfinger's "Technical Service Reference & Repair Guide" (set the orifice as far away from the seat as it goes, and adjust the locknut) appears to work better. Any comments?

Edit

This seems to work:

• Assemble the spring, poppet, lever, locknut, etc., leaving a couple of threads visible.
• Assemble the 2 parts of the barrel, screw in all the way and back off a bit to align the flats. The lever will likely drop.
• Adjust the locknut until the lever raise again and there's the tiniest free play.
• Finish the assembly, turn on the air and fine tune with the orifice.

 

[Couv]

I'm doing our 2 AIR2/III's right now (15 years overdue!).

I find the simplified procedure for tuning (preset the locknut until 2/3 threads show, and tune the orifice) doesn't work well, possibly because the 2 parts of the air barrel aren't screwed in tight in order to align the flat. When I turn on the air, the lever drops a bit.

The procedure described in Pete Wolfinger's "Technical Service Reference & Repair Guide" (set the orifice as far away from the seat as it goes, and adjust the locknut) appears to work better. Any comments?

Edit


This seems to work:

• Assemble the spring, poppet, lever, locknut, etc., leaving a couple of threads visible.
• Assemble the 2 parts of the barrel, screw in all the way and back off a bit to align the flats. The lever will likely drop.
• Adjust the locknut until the lever raise again and there's the tiniest free play.
• Finish the assembly, turn on the air and fine tune with the orifice.

That's pretty much how I do it, but note this technique will not work on the Second Generation as it does not have an adjustable orifice.

 

[Ed Palma]

Doc Ed, I will try some other shops but I was at Nautilus and Scubaworld and neither felt parts were still available. Of course, they did not really try that hard to check.

I took the unit apart and seems like a simple job to replace O-rings.

Well, if its just o-rings then, then you're set 50% vinegar bath in a ultrasonic cleaner (which are available for about a thousand pesos in either eBay.com.ph and sulit.com). If its just o-rings then Nautilus will definitely have them. (the o-ring chart is just behind the left side of the counter behind the assorted stuff on the counter).

 

[redacted]

That's pretty much how I do it, but note this technique will not work on the Second Generation as it does not have an adjustable orifice.

I did not realize that orifice was not adjustable. With a p/n of 21.080.109, does that mean that there is a version of the 108 2nd (aka HP or 080) that uses that replaceable but not adjustable orifice?

 

[Couv]

...hmm the Master brings up an interesting point. I do not remember servicing a 108 that did not have an adjustable orifice. The 108s I owned are all sold now as I prefer the 109/BA. Interesting that the AIR 2 Second Gens do not have that feature.

 

[Texfrazer]

Hey Couv,

It appears that I am missing both parts 15 and 16 (and the diaphram, but that's not too hard to find).

We might be able to work out a nice deal between the 2 of us.