13
XTX Second Stage Regulator Maintenance Manual
CAUTION: Ensure Diaphragm is seated
correctly and not creased.
Fitting Diaphragm
Fitting Hose and Mouthpiece
WARNING: Ensure that the Mouthpiece is
properly secured on the outlet port.
Before tting hose, carry out suction test by
holding thumb over Valve Spindle (20) to seal and
trying to breathe through mouthpiece outlet port.
No air should be drawn in.
19. While holding the rim of the case at eye level, turn
the seat in clockwise until the lever drops about 4mm
below the case rim.
20. Position the Diaphragm (4) into the Case (24).
Using your nger, work the edges of the Diaphragm
into place so it sits evenly in the Case. Install
the Diaphragm Cover (3) into the Case, over the
Diaphragm.
21. Screw the Case Cover onto the Case. Using the
XTX Tool (p/n AT20F) tighten the Cover until it stops.
Conrm that the Purge Button is properly aligned.
22. Add a new lubricated ‘O’ Ring (AP1409) to the male end
of the Hose. Install a new, lubricated ‘O’ Ring (AP1154)
into hose swivel end.
23. Screw the Hose onto the second stage. Using an
11/16” crows-foot and torque wrench and a spanner on
the Heat Exchanger, tighten the Hose to 5 Nm.
24. If equipped with a Comfo-bite Mouthpiece, make sure
the ‘bridge’ of the Mouthpiece (12) is facing upward.
Stretch the Mouthpiece over the second-stage Mouthpiece
outlet port. At the base of the Mouthpiece is a
groove for the Mouthpiece Clip Wrap the Clip around the
Mouthpiece so that the buckle points toward the Hose.
Tighten the Clip and snip the excess with side cutters.
NOTE: If your facility is equipped with a test bench,
perform the tests before installing the mouthpiece.
General instructions for performing bench tests are
located in the next section “Final Testing.”
25. After all testing has
been completed, ret
the Plug (26) (If tted)
into the Adjusting
Screw (30).
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