12
e) Remove the speech diaphragm housing and O-Ring
from the facepiece by unscrewing the nut on the outside.
Inspect the O-Ring for damage, replace if necessary.
(See Figure 17.)
5) For the 5400 Series, remove the Oral/Nasal cup by pul-
ing it from the mask, push and twist the exhalation hous-
ing assembly counterclockwise and remove. (See
Figures 15 and 18.)
6)
For both the 7600 and 5400 Series, remove the inhala-
ton connectors and their grommets from the facepiece.
Inspect the grommets for damage, replace if necessary.
(See Figure 19.)
7)
Prepare a solution of cleaner/sanitizer (North Catalog
number 80992) according to the cleaner/sanitizer
instructions.
8)
Wash the facepiece assembly in cleaning solution.
9) Rinse the facepiece completely in clean warm water,
then air dry in a clean area.
10) Visually inspect the exhalation valve for damage,
replace if necessary.
11) Check the oral/nasal cup and its inhalation valves
system for distortion, damage and completeness.
12) Reassemble the facepiece. Follow steps 2 through 8
above, in reverse order. Make sure all O-Rings are in
place.
13) An anti-fog coating may be applied to the lens of the
facepiece only after the lens area has dried (North
Catalog Numbers 80944 or 80945). This is mandatory
when the respirator will be used in temperatures below
32°F (0°C).
8.2 PREPARE FOR USE
1)
Install a new pair of air-purifying elements.
2)
Perform a seal check to make sure that components are
functioning properly.
E
E
N
N
G
G
L
L
II
S
S
H
H
FIGURE 17
Removing the Speech Diaphragm Housing
on the 7600 Series
FIGURE 18
Removing the Exhalation Housing on the 5400 Series
FIGURE 19
Removing the Inhalation Connector
Do not use abrasive cleaners on the lens. Abrasives
can remove the protective coating from the lens making
it susceptible to scratching and chemical degradation.
CAUTION