MSA FireHawk Ultra Elite 10048813, Maintenance And Repair

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ULTRA ELITE FACEPIECE
2. Refer to Kit 817088 Head Harness Installation instruc-
tions to attach the harness.
REMOVING THE COMPONENT HOUSING COVER
1. Remove the two component housing cover screws.
2. Remove the locking
ring, if applicable.
3. Remove the component housing cover.
a. For the 1/4 Turn Facepiece: Lift up on the cover
release hook located forward of the adapter assem-
bly opening. Once the release is lifted, remove the
cover by pulling it away from the housing. Tilt the
cover and work it over one adapter bayonet at a
time.
b. For the Firehawk Slide Facepiece: Remove the
cover by pulling it away from the housing.
c. For the Firehawk
Push-To-Connect
Facepiece:
Pull the
cover to release the
retaining hook. With
the cover between
the hex flats and
flange of the adapter,
turn the adapter
counter-clockwise to
remove.
4. Unthread and remove the adapter assembly, if applic-
able. For the Firehawk Slide Facepiece, turn the cover
upside down and backwards to use the cover as a
wrench to unthread the adapter.
Note: Be careful that you do not damage internal parts of
the component housing assembly (exhalation valve,
spring, retainer, or speaking diaphragm) once the cover is
removed.
MMR EXHALATION VALVE
Do not pull the spring retainer out of component hous-
ing slots. This could damage the component housing.
Removing the Spring and Spring Retainer
1. Slide the spring retainer to one side, then, carefully
push center of the retainer down into the component
housing freeing retainer from slots in the housing. Lift
the retainer and the spring out of the component hous-
ing. Discard spring and spring retainer.
Be careful not to damage the slots or valve seat in the
component housing. If either the slots or valve seat is
damaged, the entire component housing must be
replaced. Also be careful not to damage the soft rub-
ber surface of the valve.
2. Inspect the slots in the component housing. If either
appears to be damaged or distorted replace the dam-
aged component housing.
Installing the Pressure Demand Exhalation Valve
Spring and Spring Retainer
1. Place the new spring on the new (ivory) spring retain-
er. Place the free end of the spring over the exhalation
valve boss.
Note: The retainer ends are angled. The shorter end goes
down (toward the bottom part of the component housing).
In this position, the part number on the retainer is on the
left side facing the exhalation valve (down).
2. Insert one angled end of the spring retainer all the way
into the slot on one side of the component housing.
Place the other angled end of the retainer against the
side of the housing above the slot, push the center of
retainer down (above spring), then slide the retainer
toward the bottom of the housing until the retainer
snaps into slot.
Ensure spring retainer is secured in the sides of com-
ponent housing. If the retainer does not remain secure
the component housing must be replaced.
3. Check that the spring retainer is securely engaged in
the slots of component housing.
a. Carefully lift up the center of retainer. (the retainer
might snap again)
b. Make sure the retainer is fully engaged in the slots
6 TAL 805 (L) Rev. 4 - 10042830