Noisy M1 seconds- too hot?

[rhwestfall]

I believe you have the G250HP & S555/S600 troubleshooting guides for it....

 

[lexvil]

Yeah, I'm easy diving, not heavy breathing at all. In the absence of more information, I've dropped the lever height on both. Went with the G250 method, back out until leak, turn in until just stops and then 1/12 further turn in. See how it goes on tomorrows dive.

So I take it "normally" they aren't stuttery, chattery, noisy breathers? I hope not. Cheers.

I use tribolube very lightly but I don’t tune to the edge, I generally just tune them like a G250, adjusting knob slightly in and orifice turned just a little past stop, and than leave it for several hours with the tank off to see if there is and bleed. Mine always snap shut as soon as pressure hit them. I had one that had a cracked sleeve (the part that you turn for adjustment) it acted oddly and always seeped air until I replaced it.

I have never experienced the shudder while diving, what’s the IP?

 

[buddhasummer]

I believe you have the S555/S600 troubleshooting guide for it....

I do, cheers for the pointer, I'll look into it.

 

[buddhasummer]

I use tribolube very lightly but I don’t tune to the edge, I generally just tune them like a G250, adjusting knob slightly inland orifice turned just a little past stop, and than leave it for several hours with the tank off to see if there is and bleed. Mine always snap shut as soon as pressure hit them. I had one that had a cracked sleeve (the part that you turn for adjustment) it acted oddly and always seeped air until I replaced it.

I have never experienced the shudder while diving, what’s the IP?

130psi, almost certain I had the lever too high, tuned way too hot.

 

[lexvil]

130psi

I assume that was the pressure that they were first tuned to?

 

[Wookie]

Yeah, I'm easy diving, not heavy breathing at all. In the absence of more information, I've dropped the lever height on both. Went with the G250 method, back out until leak, turn in until just stops and then 1/12 further turn in. See how it goes on tomorrows dive.

So I take it "normally" they aren't stuttery, chattery, noisy breathers? I hope not. Cheers.

Mine sure aren’t, although I used to have to seal the T1s to get away from the squeal. Same problem the Mk20s from the early 90s had. Of course, an Atomic is practically a twin to the Mk20 from the early 90s. Jet seat made that problem go away.

 

[Wookie]

I always set my IP at 145. Always. 2 shims.

 

[buddhasummer]

Mine sure aren’t, although I used to have to seal the T1s to get away from the squeal. Same problem the Mk20s from the early 90s had. Of course, an Atomic is practically a twin to the Mk20 from the early 90s. Jet seat made that problem go away.

Yeah, had that problem with a Z2 first stage many years ago.

 

[rhwestfall]

makes me wonder if a 130 IP is too low for it's comfort, and causing this...

 

[buddhasummer]

I always set my IP at 145. Always. 2 shims.

I'm currently using an Apeks first, not a big piston fan. Upping IP will be my next move. Cheers.

In fact I'll do it now.