MIL-T-62491 Trucks, Wrecker: 4540 To 40 820 Kilograms 5-Ton To 45-Ton Lifting Capacity, Modified CommercialThis specification covers all commercial, non-tactical wreckers procured for military use. Vehicles procured under this specification are commercial items which are warranted by the manufacturer as specified in acquisition documents.

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MIL-T-62491C

3.2.6 Ratings. Vehicle ratings shall be the manufacturer's published ratings. Component and vehicular ratings shall not be raised to meet the requirements of this specification. When published ratings are not available, verification of ratings must be submitted to the engineering office of the procuring activity.

3.2.7 Overall width. The overall width of the vehicles, exclusive of tires and safety related items such as mirrors, lights, reflectors and rubber body fenders, shall be not more than 2440 mm (96 inches). The width over the tires shall be:

(a) Not more than 2540 mm (100 inches) for single rear axles rated at 10430 kg

(23,000 pounds) or less

(b) Not more than 2540 mm (100 inches) for tandem rear axles rated at 20900 kg

(46,000 pounds) or less

(46,000 pounds) and up to and including 26300 kg (58,000 pounds).

3.2.8 Accessibility. The design of the vehicle and optional equipment shall permit access for routine servicing and shall permit access for replacement and adjustment of component parts and accessories with minimal disturbance of other components and systems.

* 3.2.9 Prohibited materials. Except as permitted in 3.4.11, asbestos materials shall not be used in any form in any part of the vehicle. No item, part or assembly shall contain radioactive

materials in which the specific activity is greater than 0.002 microcurie per gram or activity per item equals or exceeds 0.01 microcuries.

3.3 Performance requirements. Performance requirements for model 4x4 and model 6x6 vehicles shall be met with the front wheel drive disengaged except that vehicles equipped with interaxle compensating devices shall meet the performance requirements with the front wheel drive engaged.

3.3.1 Speeds and gradeability. Speed and gradeability requirements shall be met with the vehicle loaded to specified GVW.

3.3.1.1 High speed gradeability. The vehicle shall ascend continuous grades specified in table VI for the corresponding vehicle class at 80 kilometers per hours (km/h) (50 miles per hour (mph)). Gradeability requirements shall be met with the main transmission in direct drive, and when a multispeed axle or auxiliary transmission is furnished, with the axle and auxiliary transmission in high speed range. Gradeability shall be verified with calculations in accordance with SAE J688 (see 6.3).