Transcript
Installation Instructions
X-RETENTION UPGRADE KIT WITH ADJUSTABLE NAPE PAD
© 2012 Gentex Corporation
When you replace components or install additional components on Gentex products, always use genuine factory-new Gentex parts. This will ensure a correct fit and maintain the safety of the product. Use of non-Gentex parts (salvage, refurbished, etc.) for replacement or additional installation will void any product warranty and may compromise the safety of the user.
X-Retention Upgrade Kit with Adjustable Nape Pad Description The universal-size X-Retention Upgrade Kit (Figure 1) enhances the stability of the U.S. Army ACH-style helmets. The user can position the adjustable nape pad to minimize forward helmet rotation, especially with night vision goggles (NVGs). Dual chin strap adjustments allow proper chin strap positioning. Slide adjustments on the front and rear straps provide for ease of adjustment and proper tensioning. The kit is designed to fit the U.S. Army TBH II, MICH, and ACH helmets, the Gentex TBH II HC and TBH II HST helmets, the U.S. Marine Corps Lightweight Helmet, and lightweight police and PASGT helmets. Available attaching hardware includes truss-head screws with A-nuts or shoulder screws with conical nuts, depending on helmet type. See Page 4 for details.
Retention assembly
Adjustable nape pad
Hardware options Truss-head screws
Shoulder screws
A-nuts
Conical nuts
Figure 1. X-Retention Upgrade Kit with Adjustable Nape Pad 1
Tools and Materials Required • Two flat-tip screwdrivers • Torque tool (if available) • Removable thread-locking compound
Procedure
Lateral pad
Lateral pad
1. Remove the four lateral pads (Figure 2) to reach the attaching hardware of the existing retention assembly inside the helmet. Note the position of the pads. 2. Remove the hardware and the existing retention assembly from the helmet. NOTES: • Before installing the screws in Step 3, apply removable threadlocking compound to the screw threads. • If a torque tool is available, tighten the screws to a torque of 80-100 inch-ounces. If a torque tool is not available, tighten the screws as much as possible using two flattip screwdrivers.
Lateral pad
Lateral pad
Figure 2. Lateral Pads to Remove (Typical) Retention strap
Nut* * Shoulder screw and conical nut shown
Screw*
Attachment points
Inside view
3. Install the X-Retention Kit with shoulder screws and conical nuts (or truss-head screws and A-nuts) at the four attachment points (Figure 3). 4. Reinstall the lateral pads. 2
Figure 3. Retention Kit Attachment
Ensure that all helmet adjustment mechanisms are properly adjusted for a snug, secure fit at all times when the helmet is worn. Failure to do so can result in an unstable helmet that will not protect the wearer. 5. Referring to Figure 4, adjust the retention as follows: a. Have the wearer don the helmet and buckle the chin strap. b. Adjust the nape pad for a snug, secure, comfortable fit at the nape by moving the two rear slide adjustments. c. Tighten the chin strap by pulling on the ends until the fit is snug, secure, and comfortable. Reattach the ends to the pile fastener when the desired fit is attained. d. If the front retention straps seem too long or too short, move the two front slide adjustments up or down. e. If necessary, reposition the nape pad by sliding it up or down the straps. 6. Check the helmet stability by attempting to rock the helmet back and forth on the head. If the helmet rocks back and forth, it is not stable. Adjust the nape pad further until the helmet is stable. 7. Repeat Steps 5 through 6 as necessary. Recheck helmet stability; no straps should be loose. 8. Release the chin strap buckle to remove the helmet. Front slide adjustment (both sides)
Nape pad Buckle Pile fastener
Rear slide adjustment (both sides)
End of chin strap (both sides)
Repositioning nape pad (rear view)
Figure 4. Retention Adjustment Points 3
Part Numbers Below are the part numbers for the X-Retention Upgrade Kit with Adjustable Nape Pad. For more information, contact Gentex Corporation, P. O. Box 315, Carbondale, PA 18407; phone (570)282-3550; fax (570)282-8555. Visit our website at www.gentexcorp.com. NOTE: The retention kit cannot be used with the X-Small sizes of the PASGT or USMC Lightweight Helmets. Description (retention assembly only, no hardware)
Part Number
X-Retention, Camouflage Green
A13229-1
X-Retention, Foliage Green
A13229-2
X-Retention, Black
A13229-3
X-Retention, Coyote Brown
A13229-4
Description (retention assembly with hardware)
Part Number
X-Retention Upgrade Kit, Camouflage Green
A13229-5*
X-Retention Upgrade Kit, Foliage Green
A13229-6*
X-Retention Upgrade Kit, Black
A13229-7*
X-Retention Upgrade Kit, Coyote Brown
A13229-8*
* Hardware Options (for part numbers A13229-5 through A13229-8): Add a space and the suffix A, B, or C after each part number to indicate the type of attaching hardware to be included with the kit as follows: A
Hardware for ACH, MICH, and TBH II-series helmets • 4 shoulder screws (B12190-1) • 4 conical nuts (B11815-1)
B
Hardware for USMC Lightweight and police PASGT helmets • 4 shoulder screws (B11816-2) • 4 conical nuts (B11815-1)
C
Hardware for U.S. Army PASGT helmets • 4 truss-head screws (80A5049-3) • 4 A-nuts (80A5050)
Example: A13229-6 A (Indicates X-Retention Upgrade Kit, Foliage Green, with hardware for ACH, MICH, and TBH II-series helmets) 4
TP0358 REV. 2
FEBRUARY 2012
