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Copyright ©2011 XS Scuba
Service & Repair Manual
a. If airflow cannot be heard, it will be necessary to initi-
ate a slight leak between the orifice and poppet. Press
the knurled knob inward to engage the slotted drive of
the Inline Adjustment Tool with the head of the orifice
inside the inlet fitting. Then, turn the orifice slightly
counter-clockwise while lightly depressing the purge
cover to prevent wear on the seat. Do not adjust any
further than is needed to establish a slight leak.
NOTE:
If more than a slight adjustment is required to
initiate a leak, it is important to check the adjustment of
the locknut on the poppet shaft to verify once again that
it is set correctly to its preliminary setting, as specified
in Step 8 of the Reassembly Procedure.
5. Hold the drive of the Inline Adjustment Tool engaged with
the orifice. While lightly depressing the purge cover, turn
the orifice slightly clockwise a very small fraction of a turn.
Pause after each adjustment to listen, and be careful to
avoid over-adjusting beyond the point that the leak has
stopped. When the leak has stopped, purge the second
stage several times to ensure that it does not return. Ob-
serve the IP Test Gauge while purging the second stage to
verify that it indicates a stable intermediate pressure after
each cycle, with no creep or fluctuation.
CAUTION
: Over-adjustment of the orifice can cause
excessive spring load in the second stage valve, and
may impair the regulator’s performance.
6. While holding the second stage with the mouthpiece fac-
ing down, gently shake it up and down. Listen closely
to determine whether any movement of the lever can be
heard inside, indicating that the lever has dropped. If lever
movement cannot be detected, proceed to step 8. Other-
wise, perform the following steps to raise the lever:
a. Remove the retaining ring, purge cover, thrust washer
and diaphragm to expose the valve assembly.
b. Apply a 4" open-end wrench to turn the locknut clock-
wise a small fraction of a turn. Do not over-adjust,
since it is important to tighten the nut onto the poppet
only as far as necessary to remove lever slack.
c. Repeat the above step until lever slack is eliminated.
d. Reinstall the diaphragm, thrust washer, purge cover,
and retaining ring.
Fig. 13 – Inline Adjustment Tool w/ IP Gauge
