Gentex HGU-56/P, Operation And Maintenance Instructions

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4. Referring to Figure 2-25 , remove
the existing outer visor as follows:
a. Push the outer visor knob
outward, and move the knob
downward along the tracks.
b. Lift the upper track slightly
to provide clearance for the
knob.
c. Slide the outer visor out of the
tracks on both sides.
5. Set the existing outer visor aside;
obtain the high-contrast visor.
6. Referring to Figure 2-26, install
the high-contrast visor as follows:
a. Lift the upper track slightly,
and slide the high-contrast
visor into the tracks where
the previous outer visor
was removed.
b. Push the knob outward, and
slide the high-contrast visor
upward along the tracks.
c. Release the knob to lock the
visor in place.
7. Referring to Figure 2-27,
reinstall the retaining ring that you
removed in Step 3. Ensure that
the retaining ring is seated in the
groove on the bushing.
8. Referring to Figure 2-23
(previous page) , reinstall the
thumbscrews through the visor
housing and the tracks.
9. Referring to Figure 2-22
(previous page) , position the
dual visor assembly over the
helmet. Reinstall the four
thumbscrews into the helmet
posts. Tighten the screws evenly.
17
Figure 2-25. Removing Existing Outer Visor
Tracks
Tracks
Outer visor knob
Outer visor (remove)
Upper track (lift slightly)
Figure 2-26. Installing High-Contrast Visor
Outer visor knob
Tracks Upper track (lift slightly)
High-contrast visor (install)
Tracks
Retaining ring
Figure 2-27. Installing Retaining Ring
Groove
on bushing