MSA FireHawk Ultra Elite 10048813, Maintenance And Repair

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ULTRA ELITE FACEPIECE
6. Install the phillips screws and tighten.
7. Verify each of the following features.
a. The adapter bayonets are locked into a horizontal
position, if applicable, and CANNOT be rotated.
b. The slip nut is threaded completely into the face-
piece and locked securely, if applicable. It CANNOT
be rotated.
c. The metal locking ring is locked into position, if
applicable, and CANNOT be rotated.
d. There is no loose play in the assembly of parts.
7. Don the facepiece and check the face-to-facepiece
seal. Follow the Facepiece Fit Check.
REMOVING THE FACEPIECE LENS AND RING
Keep the protective papers on the lens until the lens is
completely assembled in the facepiece.
Note: Remove the adapter assembly and component
housing cover.
1. Use a phillips screw-
driver to loosen and
remove the screw from
each side of the face-
piece lens retaining
ring.
2. Remove the upper and
lower lens retaining
rings.
3. Fold the facepiece flange rubber back and pull the
lens out of the groove.
INSTALLING THE FACEPIECE LENS AND RING
1. Remove any dirt, lens fragments, or other debris from
the groove.
2. Line up the new lens
center-line marks (top
and bottom) with the
facepiece center-line
mark. Insert the top of
the lens into the
groove. Work the face-
piece rubber flange
around the lens to fully
seat the lens in the
groove. When installed
correctly, the bottom
lens center-line mark lines up with the bottom face-
piece center-line mark.
3. Moisten the facepiece lens groove and the inside of
the housing ring.
4. Install the bottom ring.
Insert the tab at the top
of the component
housing into the slot at
the bottom center of
the lower lens ring. The
tab should snap into
place.
5. Line up the top lens ring center-line with the facepiece
rubber flange center-line mark. Press the ring into
place.
6. Press the ring halves together at the top and bottom
of the facepiece so that the ends mate.
7. Install a screw on each side. Start the screws. They
should thread easily. If not, remove and reinstall the
screws to avoid cross-threading. Keep hand pressure
on both ring halves.
8. As the ring halves come together, alternate tightening
the left and right screws to be sure the rings seat
completely on the rubber flange.
Do not over-tighten. Rubber must not show between
the lens ring ends at the joint. If this happens,
reassemble.
9. Remove all lens protective papers from the new lens.
10. Re-install the component housing and the adapter
assembly.
11. Don the facepiece and check the face-to-facepiece
seal. Follow the Facepiece Fit Check.
12. Install a cover lens to protect the facepiece polycar-
bonate lens during storage.
8 TAL 805 (L) Rev. 4 - 10042830