Leaky HOG D1s

[WhiteSands]

Dove in 15 deg C waters and my HOG D1 2nd stage starts "leaking" air. Its not free flowing but rather a slow leak from the mouthpiece.

Another diver came to take a look and mentioned opening up and adjusting a lever on the 2nd stage. We tried turning the knob to least sensitive and flipping the red switch to no avail.

Is it safe to adjust this myself and how do I do it? Thanks.

---------- Post added December 5th, 2013 at 03:16 PM ----------

Oh btw the diver made a comment about the regs that I'd rather not post publicly, but it got me wondering. Is this an adjustment issue or a parts quality issue?

---------- Post added December 5th, 2013 at 03:21 PM ----------

Forgot to add, my D1 first stage is a cold water one. Not sure what parts are different but thought I'd mention it in case it made a difference.

 

[Fishpie]

Nothing to do with water temp......most likely the 2nd stage just needs a tweak.
Remove the hose and turn the orifice clockwise 1/8th of a turn.
If that doesn't work buy a cheap IP gauge and see what the 1st stage pressure is.

 

[buddhasummer]

Dove in 15 deg C waters and my HOG D1 2nd stage starts "leaking" air. Its not free flowing but rather a slow leak from the mouthpiece.

Another diver came to take a look and mentioned opening up and adjusting a lever on the 2nd stage. We tried turning the knob to least sensitive and flipping the red switch to no avail.

Is it safe to adjust this myself and how do I do it? Thanks.

---------- Post added December 5th, 2013 at 03:16 PM ----------

Oh btw the diver made a comment about the regs that I'd rather not post publicly, but it got me wondering. Is this an adjustment issue or a parts quality issue?

---------- Post added December 5th, 2013 at 03:21 PM ----------

Forgot to add, my D1 first stage is a cold water one. Not sure what parts are different but thought I'd mention it in case it made a difference.

A lot of people say a lot of things particularly about one reg brand or another. In my experience most of it is usually nonesense.

In all likelihood it's an adjustment issue. ALL regs will leak out of adjustment/if adjusted incorrectly.

 

[Jim Lapenta]

It sounds like a simple adjustment issue. Did your dealer assemble and tune the regs? I always assemble and.bench test every reg sent out unless asked not to. And.provide a report with the IP cracking pressures, and notes on what other things I may have done such as attach an spg. Personally just because it's easy and does not require taking anything apart I'd check IP first. If this is a new reg it's probably fine. Then I'd think about adjusting the lever height/ pressure of the orifice on the seat. But you don't want to just turn it. The purge should be depressed while adjusting so as not to.risk cutting the seat. And 1/8 turn could be too much. If you've never done this have someone who has take care of it. Preferably your dealer or other HOG tech on a new reg.
As for the quality comment that's just so much horsecrap often spouted by those who paid way too much for their other top brand regs or dealers for other brands that just don't like HOG in general. I'd put any of my own dozen HOG/Edge regs up against anyone's. Knowing they are just as good if not better, maybe much better, than theirs.

Sent from my DROID X2 using Tapatalk 2

 

[halocline]

Dove in 15 deg C waters and my HOG D1 2nd stage starts "leaking" air. Its not free flowing but rather a slow leak from the mouthpiece.

Another diver came to take a look and mentioned opening up and adjusting a lever on the 2nd stage. We tried turning the knob to least sensitive and flipping the red switch to no avail.

Is it safe to adjust this myself and how do I do it? Thanks.

I assume these 2nd stages have a user adjustable cracking effort, and if you turned the knob all the way in and it didn't do anything that's a little strange to me. It indicates that your leak is not just from a slightly-too-light orifice adjustment. But, I don't have any familiarity with these particular 2nd stages, so take my comment with a grain of salt. Hey, maybe that's the problem, a grain of salt (well, sand) is stuck somewhere on the seat or orifice.

Another fairly common slow leak is the balance chamber (I don't know if hog 2nd even have those, they probably do) but what happens is a slow leak at the balance chamber spills a bit of air into the air barrel (and out the mouthpiece). No amount of orifice adjustment stops that one.

 

[KD8NPB]

More than likely, the MP seat poppet is dimpled. To compensate, adjust the inlet nozzle inward an 1/8th turn or so. Readjustment of the lever arm may be required.

Or, the MP seat poppet can be replaced.

 

[redacted]

As Jim said, start with an IP check and adjust if necessary. The fact that the user adjustment has no effect suggests that an orifice adjustment is not the solution and could just create a performance problem.

 

[WhiteSands]

Thanks for the help everyone. It sounds over my head so I think I'll take Jim's advice and give them to someone who knows what they're doing.

 

[rsingler]

I will chime in with one more comment that I made on another thread. The D1second stage is susceptible to one more problem that may result in a freeflow. When rebuilding, if the jam nut is not tightened with the barrel visible (e. g., before adding the diaphragm), it is possible to cock the barrel up to 5 degrees , which will leave one arm of the lever higher than the other. This problem has been corrected in the new Zephyr. In this case, it is possible that twisting a pressurized LP hose, with a jam nut that wasn't tight, twisted the barrel slightly, causing the freeflow as one arm of the lever rose and pressed against the diaphragm.

 

[ams511]

I will chime in with one more comment that I made on another thread. The D1second stage is susceptible to one more problem that may result in a freeflow. When rebuilding, if the jam nut is not tightened with the barrel visible (e. g., before adding the diaphragm), it is possible to cock the barrel up to 5 degrees , which will leave one arm of the lever higher than the other. This problem has been corrected in the new Zephyr. In this case, it is possible that twisting a pressurized LP hose, with a jam nut that wasn't tight, twisted the barrel slightly, causing the freeflow as one arm of the lever rose and pressed against the diaphragm.

I am confused. According to the HOG website the D1 is a first stage not a second stage. The second stages are the Classic, Duroc, Switchback, and Zenith.