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(3) Immerse the regulator until the water is 1/4" to 1/8" from the lip of the mouthpiece.
(4) Hold the regulator in this position for one minute and then slowly raise it out of the water.
(5) Tip the regulator mouthpiece downward and watch the inside of the mouthpiece tube. If any water
escapes from the mouthpiece tube, check for source of leakage.
EXTERNAL AIR LEAKS:
(1) Attach the regulator first stage to a tank short enough to totally submerge the first and second stage in
your filling station cooling water.
(2) With the tank valve still turned off, flood the second stage completely with water, and then position it
mouthpiece up.
(3) Turn the tank air valve on slowly and then watch for any leaks in the first or second stage (except for
the normal flow of air from the one-way bleed valve on the first stage).
(4) Repair any leaks.
TROUBLESHOOTING
POSSIBLE CAUSE RECOMMENDED ACTION
HIGH INHALATION EFFORT A
T DEPTH:
1. Interstage pressure too low . . . . . . . . . . . . . . . .First stage should be putting out 130 psig minimum.
2. Second stage improperly adjusted . . . . . . . . . .Repeat Steps 1 through 4 in the section of this manual
entitled "Set-Up".
FREE FLOWING:
1. Intermediate pressure too high . . . . . . . . . . . . .First stage should be putting out 150 psig maximum.
2. Damaged or worn L.P. poppet stem seat . . . . . .Replace seat (p/n 978-9S).
3. Nicked or corroded orifice sealing . . . . . . . . . . .Dress the orifice with a polishing stick, or replace the
orifice ice.
4. Demand lever bent too high . . . . . . . . . . . . . . .Adjust or replace the lever.
5. Weak spring in second stage . . . . . . . . . . . . . .Replace the spring.
6. Second stage improperly adjusted . . . . . . . . . .Repeat Steps 1 through 4 in the section of this
manual entitled "Set-Up".
7. Parts in the second stage have been . . . . . . . .Allow the second stage to warm back up to room
severely chilled due to repeated purging temperature (this chilling will not occur in normal
and have shrunk, allowing air to flow. diving).
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