Gentex HGU-56/P, Operation And Maintenance Instructions

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3. Ensure that the oven stabilizes at the temperature listed in Step 1 before starting the timed
sequence.
4. Set the timer, stopwatch, or equivalent for 10 minutes. Heat the TPL for approximately 10
minutes.
5. While the TPL heats, review steps 8 through 12 so that they may be completed in 30
seconds or less.
6. Using an oven thermometer, check the oven temperature every 3 to 5 minutes during the
heating process. Adjust the oven controls if the temperature falls outside the range
specified in Step 1.
7. Describe the fitting procedure to the wearer being fitted.
NOTE:
•
If headband fitting pads are installed in the helmet, remove them.
• Cover the hook fastener on the nape strap pad with masking tape to ease installation of the
heated TPL, and loosen the nape strap pad.
•
Steps 8-13 should be completed in less than 30 seconds.
8. Remove the TPL from the oven.
9. Squeezing sides of TPL together to clear
earcups, install liner in helmet as shown in
Figure 2-56 . Ensure that label and holes
are positioned toward front of helmet.
10. Have the wearer hold the helmet upside
down. Insert the TPL so that the front
edge extends approximately ¼" past the
front edge of the energy-absorbing liner.
Ensure that the liner is centered in the
helmet.
CAUTION
Do not deform the hot, soft TPL by pressing too hard in any one area when positioning
the liner in the helmet.
11. Position the top of the TPL in the helmet. Position the rear of the TPL against the top edge
of, but not down in front of, the nape strap pad while holding the nape strap pad taut.
(Continued on next page)
37
Figure 2-56. Installing TPL
Handle the heated TPL carefully; the plastic layers will be hot. Touch the fabric cover
only. Wear gloves if necessary.