Gentex HGU-56/P, Operation And Maintenance Instructions

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Installation
NOTES :
•
When installing lenses, ensure lens guides are seated in track grooves.
• Ensure bushing mates with locking notch in lower track to prevent rotation when installing
or removing thumbscrews.
•
If energy-absorbing liner was removed, replace it as directed in Paragraph 3-3.2 (after
replacing the nut plate).
1. Referring to Figure 3-24 , insert the bushings upward through the lower track.
2. Place the inner visor over the lower track.
3. Place the middle track over the inner visor. Insert the bushings upward through the middle
track.
4. Place the upper track over the outer visor, and install it in place on the bushings.
5. Reinstall the retaining rings.
6. Attach the housing to the tracks by inserting the thumbscrews through the housing and
threading them through the bushings.
7. Install the four thumbscrews downward through the bushings and into the nut plate posts to
attach the visor assembly to the helmet. Tighten the thumbscrews evenly.
8. If necessary, adjust the visor as follows:
a. Loosen (do not remove) the downstop locking screws through the holes on each side of
the visor housing. (Loosening the screws allows the downstop to be raised or lowered
approximately 1 inch (25 mm) for visor-to-mask or facial conformance.)
b. When the desired position is attained, tighten the downstop locking screws.
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