MSA FireHawk Ultra Elite 10048813, Техническое обслуживание и ремонт

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ULTRA ELITE FACEPIECE
9. Install the screw and
tighten using a small
phillips screwdriver.
Rubber must not extrude between the component
housing ring ends at the joint. If this happens,
reassemble.
10. Re-install the nosecup or air baffle (if used) in the
facepiece.
11. Re-install the component housing cover and adapter
assembly.
12. Don the facepiece and check the face-to-facepiece
seal. Follow the Facepiece Fit Check.
REPLACING THE SPEAKING DIAPHRAGM
1. Remove the nosecup or air baffle (if installed) from
inside the facepiece.
2. Unscrew and remove
the speaking
diaphragm retaining
ring.
3. Turn the facepiece upside down and shake out the
metal speaking diaphragm and gasket assembly.
4. Check the speaking diaphragm and gasket assembly
for damage. Replace it if it is worn or damaged.
5. Be sure that the gasket is on the diaphragm assembly.
Place the diaphragm in the retaining ring. Be sure that
the gasket side of the speaking diaphragm will be fac-
ing the component housing.
6. Replace the retaining ring and hand-tighten.
7. Re-install the nosecup or air baffle (if used) in the
facepiece.
8. Don the facepiece and check the face-to-facepiece
seal. Follow the Facepiece Fit Check.
REPLACING THE INLET GASKET AND DISC VALVE
1. Remove the component housing cover and the
adapter assembly.
2. Remove the disc from the gasket and inspect both for
wear. The disc should be very soft and pliable. Install
a new disc valve if it is damaged or hardened.
3. To install the inhalation disc valve:
a. Gently, stretch the hole in the center of the disc
valve over the gasket stem.
b. Note that the inlet
gasket has a groove
around its inside.
c. With the pull-tab facing you, insert the gasket into
the facepiece at an angle so that its groove cap-
tures the housing rim. The lower lip on the gasket
must be placed under the rim in the component
housing.
Note: It may be necessary to bend the gasket slightly to
work the groove under the rim all the way around. When
installed correctly, the gasket will lay flat in the housing,
and none of the spokes will be bent.
4. Re-install the adapter assembly.
5. Don the facepiece and check the face-to-facepiece
seal. Follow the Facepiece Fit Check.
ULTRA ELITE FACEPIECE COMPONENT HOUSING
INSPECTION
Note: Ultra Elite Facepieces can be identified by a mold-
ed emblem in the forehead area containing the word
“Ultra Elite”.
See User’s Instructions for additional illustrations and
information.
Inspect the component housing on Ultra Elite Facepieces
manufactured from July to December 2003 using the pro-
cedure below.
To locate the date code:
1. Hold the Ultra Elite Facepiece in one hand.
2. Gently pull the chin cup toward you.
3. Under a good light source, locate the stamped circle
on the inside, right side of the facepiece.
10 TAL 805 (L) Rev. 4 - 10042830