3M Ultimate FX Manual Del Usuario página 11

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Exhalation Valve Replacement
1. Remove valve cover by depressing bottom of cover with thumb and sliding cover up, parallel with lens (Fig. 18).
2. Remove exhalation valve assembly by turning counter clockwise 1/4 turn (Fig. 19).
3. Grasp valve and pull each valve stem out from valve seat.
4. Inspect valve seat making certain it is clean and in good condition.
5. Place new exhalation valve replacement over the exhalation port by inserting stems and pulling through from the opposite side until they are both
snapped in place. Push laterally on valve stems to ensure they are properly seated.
6. Replace exhalation valve assembly.
7. Replace valve cover.
NOTE: Conduct a negative pressure user seal check to ensure exhalation valve is functioning properly.
Nose Cup Assembly Replacement
The nose cup assembly consists of a nose cup and inhalation valves. It is designed to install directly to the lens and comfortably fit over the respirator
wearer's mouth and nose to aid in purging exhaled breath and prevent lens fogging.
1. Remove the nose cup assembly by grasping the nose cup below the inhalation valve and gently pulling up and away from lens assembly (Fig. 20).
2. To replace, position nose cup assembly onto lens assembly by aligning hard plastic ring on nose cup with lens assembly and pressing firmly on center
tabs until bottom nose cup tabs snap in place (Fig. 21).
3. Press down on top of nose cup ring until tabs snap in place.
Speaking Diaphragm Assembly Replacement
1. Remove the nose cup assembly by grasping the nose cup below the inhalation valve and gently pulling up and away from lens assembly (Fig. 20).
2. Remove valve cover by depressing bottom of cover with thumb and sliding cover up, parallel with lens (Fig. 18).
3. Remove exhalation valve assembly by turning counter clockwise 1/4 turn.
4. Remove speaking diaphragm assembly by turning counter clockwise 1/4 turn (Fig. 22).
5. Replace speaking diaphragm assembly by aligning speaking diaphragm lugs with speaking diaphragm opening in lens assembly.
6. Turn clockwise 1/4 turn until firm stop.
7. Replace exhalation valve assembly.
8. Replace valve cover assembly.
9. Replace nose cup assembly (Fig. 21).
Fig. 19
Fig. 20
Fig. 22
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(English)
Fig. 21

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