MSA FireHawk Ultra Elite 10048813, Maintenance And Repair

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ULTRA ELITE FACEPIECE
of component housing.
c. Ensure that the spring is centered on the exhalation
valve.
4. Inspect the slots in the component housing. If either
appears to be damaged or distorted replace the dam-
aged component housing.
5. Install Component Housing Cover
Note : If the cover hook does not snap in place, hand-
tighten the adapter assembly clockwise until two corners
of a flat line up with the two notches in the top of the
component housing inlet. The cover should snap into
place.
Don the facepiece and check the face-to-facepiece
seal. Follow the Facepiece Fit Check procedures.
1. Don the facepiece.
2. Cycle exhalation valve by inhaling and exhaling six
times before testing the face-to-facepiece seal.
3. To check for facepiece fit, hold the palm of your hand
over the inlet connection and inhale. Hold your breath
at least 10 seconds. The facepiece should collapse
and stay collapsed against your face. If it does not,
readjust the facepiece and test again. If this does not
correct the leak, do not use the facepiece.
4. To test the exhalation valve, take a deep breath and
hold it. Block the inlet connection with the palm of
your hand and exhale. If the exhalation valve is stuck,
you may feel a heavy rush of air around the facepiece.
You may need to exhale sharply to open the valve.
INSTALLING THE ADAPTER ASSEMBLY
1. The 1/4 Turn Facepiece
a. Holding the adapter
assembly in one
hand, rotate the slip
nut so that the octa-
gon flange on the
slip nut lines up with
the octagon flange
on the adapter.
b. Thread the adapter assembly into the facepiece.
Use the spanner wrench to torque the adapter to
12-27 in.lbs. If necessary, continue to torque until
the top flat on the octagon is horizontal.
c. The bayonets must
be in a horizontal ori-
entation. If the bayo-
nets are not horizon-
tal, remove the
adapter assembly
and turn the slip nut.
d. Re-install the adapter assembly so that the bayo-
nets are horizontal when the adapter assembly is
torqued 12-27 in.lbs.
2. The Firehawk Slide Facepiece
a. Thread the slide adapter into the component hous-
ing, handtight.
b. Use the component housing cover to tighten the
adapter so that the next hex flat is aligned with the
two index marks near the top of the component
housing.
3. The Firehawk Push-To-Connect Facepiece
a. With the cover
between the hex flats
and flange of the
adapter, thread the
adapter into the com-
ponent housing.
b. Insert the tab on the cover into the slot in the lens
ring.
c. Tighten the adapter so that the top hex flat is hori-
zontal.
d. Press the cover until the retaining hook snaps into
place.
INSTALLING THE COMPONENT HOUSING COVER
1. Place the component housing cover over the adapter
assembly. Tilt and rotate the cover to work it over one
bayonet at a time, if applicable.
2. Insert the tab on the cover into the slot in the lens ring.
3. Press in on the front of the cover until the cover hook
snaps in place.
4. Install the locking ring by sliding it into the groove on
the adapter, if applicable. (Do not slide it into the
space between the slip nut flange and the adapter
flange.)
5. Place the spacers in the cover sockets under the lock-
ing ring, if applicable.
7 TAL 805 (L) Rev. 4 - 10042830