MSA Advantage 4000 Maintenance And Repair page 6

4. Carefully pry open the exhalation-valve cover.
5. Turn the adapter clockwise until loose.
6. Lift and continue turning to remove the adapter.
7. Remove the locking button. Be careful not to
lose the springs
8. Remove the exhalation-valve spring retainer.
MSA 9011 (L) Rev. 0 - 10104243
ADVANTAGE 4000 FACEPIECE
9. Remove the ehalation-valve spring.
10. Remove the exhalation valve.
11. Gently pull the inhalation valve from the post.
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