Gentex SPH-4B Assembly

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SPH-4B

HELMET ASSEMBLY

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Summary of Contents for Gentex SPH-4B

Page 3 This booklet contains a description of the SPH-4B helmet assembly and its components. Also included are instructions for sizing and fitting the helmet, custom-fitting the TPL, and modifying the ANVIS mount. A parts list at the end of the booklet provides information for ordering the helmet and its components.
Page 4 COMPONENT DESCRIPTION SHELL Helmet Shell (Figure 2) The lightweight composite helmet shell protects the head from impact. Chafing pads prevent the earcups from CROSS chafing against the side of the STRAPS shell. Cross straps control earseal compression for CHAFING optimum fit and noise reduction.
Page 5 Earcups (Figure 4) FILLER RECEIVER SPACER EARCUP RETAINER EARSEAL Lightweight energy- PADS absorbing earcups provide lateral impact protection and sound attenuation. The earcups are contoured to enhance the fit to the ear, and can be rotated RECEIVER FILLER EARCUP SPACER within the retention EARSEAL RETAINER...
Page 6 Dual Visor Assembly (Figure 6) ANVIS MOUNTING The lightweight dual visor OUTER VISOR PLATFORM VISOR assembly consists of a visor HOUSING LOCK housing, a clear visor, a neutral gray (sunshade) visor, INNER actuating knobs, tracks, and VISOR attaching hardware. The center KNOB of the visor housing features an ANVIS mounting platform for...
Page 7 HELMET SIZING Helmet size is based upon head circumference as follows: HEAD CIRCUMFERENCE (INCHES)* HELMET SIZE TPL SIZE Less than 21.5 Regular Small/regular 21.5-22.4 Regular Regular Greater than 22.4 X-Large X-Large *Guidelines only. At times, the next smaller or larger size may be needed for a satisfactory fit.
Page 8 TPL CUSTOM-FITTING INSTRUCTIONS Tools and Equipment Required 1. Convection oven, capable of stabilized sustained temperature 200°F +5°F (93.3°C +2.8°C) with a thermometer and an internal volume of approximately 1.5 cubic feet or equivalent 2. Timer or equivalent 3. Masking tape 4.
Page 9 Custom Fitting Procedure (continued) STEP REMARKS 5. Don the skull cap (optional). - Personnel intending to wear a skull Personnel with a full head of hair do cap should do so during the fitting not require a fitting cap or a skull process.
Page 10 Custom Fitting Procedure (continued) STEP REMARKS 11. Check the eye offset using a ruler. - Offset should be 2” ¼”. 12. Pull downward with hands on top of - Hold for five minutes. the helmet until the ears are - Ensure that the entire ear is covered centered in the earcups.
Page 11 ANVIS ATTACHMENT Before an ANVIS NVG is installed on the SPH-4B helmet, the ANVIS mount must be modified, and a cable clip must be attached to the helmet. The ANVIS attachment kit contains installation instructions, four screws for the rear of the mount, a cable clip with an attaching screw, pile fastener for attachment of the ANVIS battery pack to the helmet, and moleskin lens guards for visor protection.
Page 12 ILLUSTRATED PARTS LIST The SPH-4B Helmet may be ordered as a complete assembly; the components shown in Figure 9 and listed on Page 11 also may be ordered separately. For further information, contact GENTEX Corporation, Carbondale, PA 18407, phone (570) 282-3550, fax (570) 282-8555, or visit our web site at www.gentexcorp.com.
Page 13 FIG. NO. DE SCRIP TION QTY. PART NO. SPH-4B Hel met As sem bly, Reg u lar 89D7825-1 SPH-4B Hel met As sem bly, X-Large 89D7825-2 Hel met Shell, Reg u lar 83A6162-4 Hel met Shell, X-Large 83A6163-4 En ergy Ab sorb ing Liner, Reg u lar...
Page 14 NOTES...
Page 16 www.gentexcorp.com TP0017 REV. C JUNE 2003...

Gentex SPH-4B Assembly

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Summary of Contents for Gentex SPH-4B

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