M-935, M-936, & M-937 Faceseals (M-100, M-200 & M-300 Series); M-445, M-456, M-457, & M-458 Outer Shrouds (M-400 Series) - 3M Versaflo M Serie Instrucciones

M-350 Head Suspension (M-300 & M-400 Series)
NOTE: For M-300 series users: You must first detach the faceseal from the suspension headband. See
M-935, M-936, & M-937 Faceseals in this section for additional information.
To replace head suspension:
- With the headgear upside down, release the head suspension from the headgear shell by pushing
upwards on the plastic hangers of the web straps. The hangers are shown in Fig. 12.
- Remove the remaining center web strap by pushing upwards on the plastic hangers.
- To install new suspension, attach the single web strap that is not attached to the headband into the
headgear shell by inserting the hangers into the slots. The center strap attaches in the slots next to
the 3M pivots.
- Align the head suspension over the shell with the ratchet towards the air inlet and the comfort
pad end of the suspension towards the visor. Attach the plastic hangers of the suspension into the
remaining slots to complete installation of the suspension. All hangers must be attached. Ensure
hangers are fully seated and flush to shell slot.
M-935, M-936, & M-937 Faceseals (M-100, M-200 & M-300 Series)
To remove faceseal:
- With the visor frame in the down (closed) position, remove plastic faceseal tab from "T" attachment
points on headband (Fig. 13a & b).
- Grasp the black faceseal gasket and slowly pull straight out in small sections, working your way
around the faceseal (Fig. 13c).
NOTE: Do not bend gasket over and 'peel' off as this may damage the gasket ribs. Do not start in the
middle of the gasket. Pull out in small sections starting at one end.
Fig. 11
Fig. 12
14
To install faceseal:
- On the faceseal, locate the side with the fabric "loop" which is sewn into the elastic. Holding the
faceseal with this side facing up, grasp the black gasket on the faceseal and align with the edge of
the groove in the visor frame. Starting with one edge, press the gasket firmly into the groove in small
sections, working your way around the faceseal (Fig. 13c). Both gasket ribs should be fully inserted
into the groove.
- Locate the "T" hooks on the suspension (Fig. 13d). The plastic tab of the faceseal attaches to this
hook on the suspension. To attach, slide the tabs in between the suspension and the headgear
shell. Attach notch in faceseal tabs onto the "T" hooks located on the suspension headband (Fig.
13b).
- Grasp elastic loop on faceseal and pull up over suspension headband and attach to the plastic tab
(Fig. 13a).
Fig. 13c
M-445, M-456, M-457, & M-458 Outer Shrouds (M-400 Series)
To remove the outer shroud:
- Pull the large plastic tab off the air inlet of the headgear and release the suspension ratchet from the
hole in the outer shroud (Fig. 14a).
- Grasp the black shroud gasket and slowly pull straight out in small sections, working your way
around the shroud (Fig. 14b).
NOTE: Do not bend gasket over and 'peel' off as this may damage the gasket ribs. Do not start in the
middle of the gasket. Pull out in small sections starting at one end.
To install the outer shroud:
- Insert air inlet of headgear through the hole in the large plastic tab on the outer shroud. Push tab
fully onto the air inlet such that it is flush to the headgear shell. Push the ends of the plastic tab
underneath shell lip. Insert head suspension ratchet through hole in shroud (Fig. 14a).
- Grasp the black shroud gasket and pull to expose the edge of the gasket where it meets the elastic
(Fig. 14c). Align the edge of the gasket with the edge of the groove in the headgear. Press the gasket
firmly into the groove in small sections, working your way around the shroud. Start at one end and
work around in one direction. When you reach the end of the groove in the headgear on the other side
from where you started, the gasket on the shroud may extend slightly beyond the edge of the groove
– this is acceptable – but it is critical that both gasket ribs are completely inserted into the groove.
Fig. 13a Fig. 13b
Fig. 13d
15