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organism(s) of interest, they could potentially lead to damage and eventual deterioration of the facepiece
or its components. For more information regarding respirator cleaning procedures, refer to OSHA 29 CFR
1910.134 Appendix B-2.
FACEPIECE DISASSEMBLY
If the facepiece is to be disassembled for decontamination, follow the steps below.
1. Remove the yoke from the facepiece by placing your fingers under the loops, near the center of the
yoke. Apply force upwards until the yoke pops off.
2. Remove the speech diaphragm & gasket by pushing them out from the inside of the facepiece.
3. Stretch the gasket away from the speech diaphragm to remove.
FACEPIECE ASSEMBLY
If the facepiece is disassembled for decontamination, follow the steps below to reassemble.
1. Stretch the gasket around the speaking diaphragm. The gasket should be installed so that the thin-
ner rim of the gasket is on the side of the diaphragm with 4 small bumps.
2. Insert speaking diaphragm and gasket assembly into facepiece such that the side of the speaking
diaphragm with 4 small bumps faces outward. The gasket has two sealing surfaces. The first sealing
surface should be pressed into the mask completely before pressing in the second sealing surface.
Ensure the gasket is laying flat, with no rolls.
3. Attach the yoke to the facepiece by aligning the tabs on the facepiece with the larger slots on the
yoke. The yoke’s webbing slots should point upwards. Push straight down on the center of the yoke
until you hear a click.
TAL 122 (L) Rev. 0 - 10218530
Remove yoke
Remove speech diaphragm
& gasket
Remove gasket
Install gasket around the
speaking diaphragm
Insert speaking diaphragm into mask
