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|  MIL-T-62498
3.2.8 Ratings. Vehicle ratings shall be 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.
3.2.9 Cab-to-axle dimension. The cab-to-axle dimension shall conform to that
recommended by the refuse collection body manufacturer for conformance to this specification.
3.2.10 Width. The overall width of the vehicle, exclusive of mirrors, light reflectors, and
tires, shall be not more than 96 inches. The width over the tires shall be not more than
100 inches.
3.3 Performance.
3.3.1 Speeds. High and low speed requirements shall be met with the vehicle loaded to
required GVW.
3.3.1.1 High speed gradeability. The vehicle shall ascend grades specified in table II at
50 miles per hour (mph). Gradeability shall be verified with calculations in accordance with
SAE J688 (see 6.3). Gradeability requirements shall be met with the main transmission in direct
drive.
TABLE II. Gradeability.
Vehicle size
Gradeability
17, 29
1.0
39
0.8
3.3.1.2 Low speed. Low speed shall be calculated with the engine operating at not less
than 35 percent of the recommended governed speed and shall provide a vehicle speed not
greater than 6 mph.
3.3.1.3 Maximum geared speed. The maximum geared speed at engine governed speed
shall be not less than 50 mph (minus 1 percent). Conformance to geared speed specified shall be
determined by calculating in accordance with the following formula:
Maximum geared speed (mph)=
Governed speed (rpm)
Total gear reduction x tire factor (see 6.3)
3.3.2 Service brakes. The service brakes shall control and hold the vehicle on a 30 percent
grade when the vehicle is loaded to its required GVW. The service brakes shall stop the vehicle,
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