Titan LX Second Stage Problem

[keyshunter]

One of my Titan LX seconds (I have 5) has an issue that I can't seem to resolve. It intermittently had a very slight freeflow. It may go 10 or 12 breaths, and then begin bubbling slightly. Increasing the spring pressure to a point where it breaths much harder did nothing to prevent this intermittent bubbling. So, I did a complete rebuild on the second stage (IP is stable). The air barrel and shuttle looked clean. I replaced the seat and all of the o-rings, reassembled it, and...same thing. It seems that something is binding, but I can't find where. It is pretty annoying. I would appreciate input from someone who has experience with this type of problem.

 

[elan]

Did you check the edge of the orifice with a luppe or a microscope? There might be some dings. Does it do the same when the purge cover and the diaphragm are off? Does the lever hight react to screwing and unscrewing the orifice?

 

[Fishpie]

Did you change the o ring around the oriface as well as the tiny one on the shuttle?
Is the demand lever bent, especially the tabs that contact the shuttle?

 

[keyshunter]

Elan,
One of the first things I checked was the clearance between the diaphragm and the lever. I did not use a loupe on the orifice edge. I would think that a nick here would cause a constant bubbling, but I will loupe it anyway.

Fishpie,
I changed all of the o-rings, even the tiny one on the end of the shuttle. The lever seems to operate ok. How do I check for bent tabs? I was just sitting here wondering if there could be a problem with the shuttle itself? I know that when Zeagle began making their own regs, they had some bad shuttles., but they were really tight in the tube.

 

[halocline]

I'm not sure if this 2nd stage is a balanced barrel poppet, but if so what you're describing is a classic leaky balance chamber. It takes a few seconds, but eventually enough air leaks out to allow the downstream air to push the seat off the orifice.

 

[inka]

i have 2 second stage Titan LX, if someone of you,have the setting of the screw ( side of the shuttle, hardness of breathing ) it will help me.( from fully tight , how many anti clock turns of screw ? 2,3 ???
Thanks

 

[steveharriss]

LX is 2, LX Supreme is 1 1/4