MSA Advantage 4000 Series Operation And Instructions Manual page 19

RUBBER HARNESS STRAPS REASSEMBLY
1. Place the new harness on a flat surface with the MSA
logo facing "right-side up." In this position, the straps
above the logo are the top straps.
2. Grasp one top strap and fold the end-tab in half.
3. From the "face" side of the facepiece, insert the end
tab under the slot in lens ring.
4. Thread the end-tabs up through the lens ring slots and
pull strap through several inches.
Attach the bottom straps to the bottom, detachable
buckles:
1. Place the buckle's button-hole over the button.
2. Grasp a facepiece tab and buckle in each hand and
pull them apart until the button snaps into the button-
hole.
3. Ensure the strap is not twisted and that the boss on
end-tabs side is facing up (away from the inside of the
facepiece).
4. Thread the end tabs with the boss facing up, through
the bottom slot of buckles, then over center bar, down
through top slot of buckles.
5. Pull straps through buckles.
6. Don the facepiece and perform the Negative Pressure
Seal Test.
CLOTH HEAD HARNESS DISASSEMBLY
Removing the Cloth Head Harness
1. Removing the upper strap.
• At the top of the lens ring, fold the mask rubber
down against the lens.
• Push the straps and netting down against the lens,
pivoting the upper buckle on the adapter clip
• Pull upper buckle down, pulling them out of the
adapter clip.
Replacing the Cloth Head Harness
1. Removing the bottom strap
• Grasp the metal buckle and the facepiece tab. Push
them together until the button is free from the buck-
le.
Removing the Adapter Clip
1. Slide the blade of a flathead screwdriver between the
top of the lens ring and each black clip.
2. Pivot the screwdriver until the clip disengages.
Replacing the Cloth Head Harness
Note: Adapter clips are identified with an "R" or "L" indi-
cating right and left sides.
1. Reassemble the adapter clips by pressing them into
lens rings until fully engaged..
INSPECTION
2. Installing the top straps.
• Place the new harness on a flat surface so the
straps behind the MSA logo are the top straps.
• Ensure the black adapter clips are engaged.
• Fold the mask rubber down against the lens.
• Slide the slotted part of the black upper buckle up
into its respective side's black adapter clip.
• Pivot the upper buckle up and pull the strap, ensur-
ing proper assembly.
3. Install the bottom strap
• Place the metal buckles bottom-hole over the but-
ton then grasp a mask tab and buckle in each hand
and pull them apart until the button shaft snaps into
the button hole.
• Thread the strap ends through the forward slot of
the buckles, then over center bar, down through the
rear slot of the buckles. Pull strap through the buck-
les.
• Ensure no straps have become twisted. All straps
should lay flat against the head when the facepiece
is donned.
• Perform a Negative Pressure Seal Test to insure that
a seal has been achieved.
Note: All procedures are from the "face" side of mask.
1. Fold the mask rubber against lens.
2. Slide the slotted part of top strap under the Adapter
Clip, push the slotted part into Adapter Clip. Pull on
strap to ensure it is secure in Adapter Clip.
3. Make sure the strap is not twisted and ensure the
strap moves freely.
Bottom Straps
Attach the bottom straps to the bottom, detachable buck-
les:
1. Place the buckle's button-hole over the button then
grasp a mask tab and buckle in each hand and pull
them apart until the button snaps into the button hole.
2. Make sure the strap is not twisted, and that the boss
on end-tabs side is facing up (away from the inside of
the mask).
3. Don the mask and perform the Negative Pressure Seal
Test.
Adapter Clips Reassembly
Note: All procedures are from "face" side of mask.
1. The adapter clips are identified with an "R" or "L". "R"
is for right side. "L" is for self side of lens ring.
2. With the "R" or "L" must face into the center of the
mask and to the back of lens ring.
3. Push the new adapter clip over the boss of the lens
ring.
4. Ensure the adapter clips are tight on lens ring.
19 TAL 018 (L) Rev. 6 - 10073772