M-150 Head Suspension (M-100 Series)
To replace head suspension:
– Detach the faceseal and forehead seal button from the suspension headband. See M-935, M-936,
& M-937 Faceseals & M-154 Forehead Seal in this section for additional information.
– Release the suspension from the headgear by pulling the height adjustment slot off the peg at each
of the four attachment points. Fig. 11 points to one of the attachment slots. There are 2 in the rear
and 2 in the front of the headgear.
– Install new suspension by snapping each of the four height adjustment slots onto the four pegs on
the headgear shell. note: See Donning and Fitting section of these User Instructions for information
on adjusting the suspension for a comfortable fit (Fig. 11).
– Attach faceseal and forehead seal button to suspension.
– Adjust suspension for fit and comfort according to the Donning & Fitting section of these User
Instructions.
Fig. 11
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.
Fig. 12
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M-935, M-936, & M-937 Faceseals (M-100 & 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.
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. 13b
Fig. 13a
Fig. 13c
Printed Colors – Front:
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Requester: Farrel Allen