Service & Repair Manual
15
Copyright ©2008 XS Scuba
15. Install the O-ring(10) onto the head of the adjustable
orifice(9) and carefully insert the orifice into the inlet of the
air barrel with the polished cone facing in. Using a small
wooden or plastic down, press the orifice in so that it rests
against the threads inside the air barrel. (See Fig. 17.)
16. While holding the retaining clip stationary, apply a wide
blade screwdriver to turn the venturi deflector counter-
clockwise until a) it is perfectly flush with the outer surface
of the housing, b) the deflector vane is resting directly
over the outlet port of the air barrel, and c) the slots are
straightly aligned. (See Fig. 18.)
17. Fit the deflector switch(23) onto the venturi deflector so
that the knob is seated against the forward stop. (See
Fig. 19.)
18. Mate the screw(24) into the outer center of the deflector
switch, and apply a medium blade screwdriver to turn it
clockwise until snug. Do not overtighten.
19. Apply a medium blade screwdriver to the slotted head of
the orifice inside the air barrel, and turn it clockwise while
closely watching the lever. When the lever starts to drop,
stop – do not turn the orifice any further. This will indicate
that the orifice has made contact against the LP seat.
(See Fig. 20.)
20. Lay the diaphragm(4) inside the housing, directly over the
lever with its raised surface facing up, and then the thrust
washer(3).
21. Fit the diaphragm cover(2) inside the housing so that it
seats directly over the diaphragm. Turn it as needed to
align the logo straight between the inlet and adjustment
knob.
22. Mate the retaining ring(1) over the diaphragm cover and
into the housing, and turn it clockwise to engage the
threads. While holding the front cover secure with one
hand, tighten the retaining ring until snug with the other.
Be careful to avoid over-tightening.
23 Install the mouthpiece(11) onto the housing, correctly ori-
ented with the top facing up. Fasten a tie-strap(12) over
the mouthpiece with the locking tab facing toward the
inlet coupling, and cinch it snug. Trim the excess material
close to the locking tab.
▼
After completing the reassembly of the second stage,
proceed to Section 5 – Final Testing
Fig. 19 – Correct Position of Venturi Switch
Fig. 17 – Installation of Orifice
Fig. 20 – Preliminary Orifice Setting
Fig. 18 – Venturi Deflector Set Flush
