Installing The Lens; Installing The Lens Rings - MSA Advantage 4000 Maintenance And Repair

13. Install the exhalation-valve cover.
Note: If the exhalation-valve cover does not fit, rotate the
adapter clockwise a few degreees and try again.
14. Snap exhalation-valve cover shut.

Installing the Lens

Single Port Lens, 4100-S
Single Port Lens, 4100-H
1. Check the groove for dirt or debris that could interfere
with a good seal.
ADVANTAGE 4000 FACEPIECE
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2. Align the lens center mark with facepiece centerline
and insert the top of the lens into the groove.
4. Ensure that the groove fully captures the lens.

Installing the Lens Rings

Upper Lens Ring
Lower Lens Ring
1. Put Phillips head screws into the flanges.
2. Install the top lens ring.
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