Gentex HGU-56/P, Инструкция по эксплуатации и обслуживанию

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6. With the compass set to the
appropriate value as specified
in Step 5, position the point of
the compass below the lower
dual visor assembly post on
one side of the helmet, and
draw an arc as shown in
Figure
2-35 to intersect with the first
arc.
7. Repeat Step 6 for the other side
of the helmet.
8. On one side of the helmet,
center punch the point at which
the arcs intersect. Repeat for
the other side.
CAUTION
• Be careful not to damage any components inside the helmet when performing Steps 9-11.
• Be sure to drill the helmet shell as specified in Steps 9-11, or delamination of the helmet
shell could result, making the helmet unserviceable.
•
When performing Steps 9-11, hold the drill perpendicular to the helmet shell to prevent
damage to the shell and the energy-absorbing liner.
• Use the 2x4 block of wood as specified in Steps 9-11 to prevent damage to the helmet
shell.
9. On both sides of the helmet, at the center punched marks where the two arcs intersect,
firmly hold a 2x4 block of wood inside the helmet shell behind the drilling point. Use a
1/16-inch drill bit to drill a pilot hole. Continue to hold the block in this manner in Steps 10
and 11.
10. Use a 9/64 drill bit to drill through the pilot hole.
11. Finish drilling the hole with 3/16-inch drill bit.
(Continued on next page)
22
Figure 2-35. Drawing Arc from Post
• Wear eye-protective goggles when drilling holes in Steps 9-11 to prevent eye injury.
•
Use the 2x4 block of wood as described in Steps 9-11 to prevent hand injury.
Arc
Post