13
MTX-R 2nd Stage Maintenance Manual
26. Screw the Case Cover (2) onto the Case. Using
the MTX-R Tool (AT94) tighten the Cover until it stops.
Conrm that the Purge Button is properly aligned.
Fitting Hose and Mouthpiece
WARNING:
Ensure that the
Mouthpiece is
properly secured
on the outlet port.
Before tting hose, carry out vacuum test by
holding thumb over Valve Spindle (17) to seal
and inhale through mouthpiece outlet port. No air
should be drawn in.
27. Add a new lubricated ‘O’ Ring (26) to the 3/8” end
of the Adapter Hose (33). Install new, lubricated ‘O’
Rings (15) into the hose swivel at both ends.
29. Fix the second stage into a soft jawed vice as
explained in section 20.
31. If equipped with a
Comfo-bite Mouthpiece,
make sure the ‘bridge’
of the Mouthpiece
(8) is facing upward.
Stretch the Mouthpiece
over the second-stage
Mouthpiece outlet
port. At the base of the
Mouthpiece is a groove
for the Tie Wrap (7).
Tighten the Tie Wrap so
that the buckle points
toward the Hose. 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.”
32. After all testing has
been completed, ret
the Bumper (28) onto
the Spindle (17).
This Completes Assembly
30. Screw the Hose
onto the second
stage. Using an 11/16”
crowsfoot and torque to
5Nm (3.7 ft/lb).
28. Screw the Adapter
Hose (33) into one end
of the hose (32). Hold
the hose swivel with
an 11/16” spanner and
torque to 5Nm (3.7 ft/
lb) using a 5mm Hex
Key Bit.
NOTE: If air is drawn in refer to trouble
shooting guide.
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