MIL-T-62491C
* 3.1.1.16 All wheel drive conversion. The chassis manufacturer's standard 4x2 or 6x4 truck chassis may be modified to provide all wheel drive conforming to the requirements specified herein if:
(a) The conversion axle manufacturer's engineering department specifically approves and certifies that all such modifications meet the design requirements and standards of the conversion axle manufacturer. Certification shall be based on both design analysis and proving ground test reports, which shall be made available to the engineering and quality assurance offices of the procuring activity.
(b) The chassis manufacturer's front axle before conversion has the same load rating as the conversion axle to be installed.
(c) Components used in the all-wheel drive conversion are of current production.
(d) Components used in the all-wheel drive conversion are approved for the conversion application by the component manufacturers.
(e) The converted vehicle is certified to conform to Federal Motor Vehicle Safety Standard
No.121, by the intermediate or final manufacturer.
* (f) Replacement headlights, if required to be added, shall meet the height requirement of not less than 560 mm (22 inches) and not more than 1370 mm (54 inches), measured above the road surface, in conformance with Federal Motor Vehicle Safety Standard No.108. Replacement headlights shall be equivalent in mounting, protection, range and precision of adjustment to the chassis manufacturer's original standard headlights.
(g) Unused headlight cavities are covered in a neat workmanlike manner, treated and painted to match the chassis cab color with treatment and painting equivalent to the chassis cab manufacturer's process for the remainder of the chassis cab. Cavities and their covers shall be rustproofed in accordance with 3.1.1.3.
(h) Complete installation drawings are available to the acquisition activity.
* 3.1.1.17 Auxiliary generator unit. When specified (see 6.2), an auxiliary 120 volt, 60 Hertz (Hz), single phase, gasoline powered, 5 kilowatt (kw) alternating current (ac) generator unit shall be provided. The generator unit shall be located at the rear of the wrecker and placed such that the location will not interfere with the operation of the boom(s).
3.2 General design.
3.2.1 Federal Motor Vehicle Safety Standards. The vehicle and furnished accessories shall comply with all Federal Motor Vehicle Safety Standards in effect on the date of manufacture.
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