MSA Advantage 4000 Series Operation And Instructions Manual page 17

Locate the exhalation cover.
8. Place the lower tabs of the cover into the inlet assem-
bly.
9. Snap the top half of the cover into place.
The plugged Inlet Assembly is now ready for use with the
Advantage 4000 Facepiece.
Reassembling the RD40 Inlet Assembly
1. Lightly lubricate exhalation valve stem with Christo-
Lube ® (PN 604070) or similar fluorinated lubricant.
2. Carefully press the valve stem into orifice by pushing
in the center of the valve face
3. Locate the button and place a small spring in each
hole.
4. Put the button into mating cavity and locate the
adapter.
5. Insert adapter into grooved channels by locating
recessed button cavity.
6. Press adapter into place and rotate adapter 3/8-turn
counter-clockwise. A click will be heard when the but-
ton engages
7. Roll a new o-ring into position on the groove/interface
between the RD40 adapter and the component hous-
ing. Locate the exhalation cover.
8. Place the hinge tabs into the slots. Snap the cover
into place and locate the inhalation valve disc.
9. Carefully stretch the valve disc over the stem in the
center of the spider gasket.
10. Replace the spider gasket valve in the seating groove
inside of the RD40 Adapter.
The RD40 Inlet Assembly is now ready for use with the
Advantage 4000 facepiece.
Reassembling the PTC Inlet Assembly
1. Lightly lubricate exhalation valve orifice.
2. Carefully insert disc portion of valve stem into orifice
and stretch around until stem and valve are fully
engaged and properly oriented.
3. Insert valve stem shaft into exhalation port of compo-
nent housing.
4. Place exhalation pressure demand spring on spring
retaining clip and, while holding spring on clip, set
opposite end of spring in valve crown portion of exha-
lation valve.
5. Firmly press spring retaining clip sides into matching
holes on component housing until engaged
6. Locate the button and place a small spring in each
hole.
7. Put the button into mating cavity and locate adapter
8. Insert adapter into grooved channels by locating
recessed button cavity.
9. Press adapter into place and rotate adapter 3/8-turn
counter-clockwise until it locks into place.
10. Roll a new O-ring into position on the groove/interface
between the PTC adapter and the component hous-
ing. Locate the exhalation cover.
INSPECTION
11. Place the lower tabs of the cover into the mating
grooves above the adapter.
12. Snap the cover into place and locate the inhalation
valve disc
13. Carefully stretch the valve disc over the post in the
center of the adapter
The PTC Inlet Assembly is now ready for use with the
Advantage 4000 facepiece.
Disassembling the Facepiece: Model 4100 and 4200
1. Remove the U-clip from the inlet housing front by
spreading away from the inlet assembly and sliding it
down. Set the U-clip aside.
2. Push the inlet housing through the facepiece lens by
applying inward force at bottom of inlet housing
3. Remove the nosecup by grasping to close to the inlet
housing flange.
4. Remove and discard the small internal o-ring.
5. Remove the larger external o-ring and replace.
6. Set the inlet housing aside.
7. Holding the nosecup, gently push the inlet check
valves from inside and through the nose-cup.
8. Inspect the silicone valves for any damage. Replace if
damaged.
Disassembling the Facepiece: Model 4200 only
1. To replace the inhalation valves on the lens bayonet
connectors, line the holes up in the valves with the
posts on the back of the lens bayonet connectors and
gently stretch the valve openings to slip over the posts
2. Remove the bayonet connector gaskets by stretching
the gaskets slightly and lifting them over the bayonet
connectors.
Removing the Lens from the Facepiece Blank
1. Remove the head harness. See the Removing the
Head Harness section.
2. Using a Phillips screwdriver, unthread and remove the
two screws securing the lens rings.
3. Separate the lens rings by inserting a flat head screw-
driver into the rear notch of each side until it is seated
firmly.
4. Carefully rock the screwdriver up and down until either
half can be pulled from the facepiece blank by hand.
5. Fold back the facepiece blank and remove the lens.
Set all components aside. Do not discard.
DO NOT allow the screwdriver blade to contact any
portion of the facepiece blank.
Reassembling the Facepiece
1. To reassemble facepiece, reverse the preceding direc-
tions with the exception of the lens which is reassem-
bled as per the following instructions.
17 TAL 018 (L) Rev. 6 - 10073772