MIL-T-62021 Trucks, Pipe And Sewer Cleaner: High Pressure Water Jet Type, 5680 Liter 1,500 Gallon, 12 700 Kilograms 28,000 Pounds Gvw, 4X2, Modified CommercialThis specification covers diesel and gasoline engine driven, four-wheel, two-rear-wheel drive, 5680 liter L 1,500 gallon, high pressure water jet, pipe and sewer cleaner modified commercial trucks having a gross vehicle weight GVW of 12700 kilograms kg 28,000 pounds, for normal operating conditions. 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-62021E(AT)

3.2.8 Cab-to-axle. The vehicle cab-to-axle dimension shall no be less than 2130 mm

(84 inches).

* 3.2.9 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.

* 3.2.10 Prohibited materials. 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.

3.3.1 Speeds and gradeability. High and low speed requirements shall be met with truck loaded to specified GVW.

* 3.3.1.1 High speed gradeability. The vehicle shall ascend continuous grades of

2.0 percent at 80 kilometers per hour (km/h) (50 miles per hour (mph)). Gradeability

requirements shall be met with the main transmission in direct drive and, when multispeed axle is furnished with the axle in high speed range. Gradeability shall be verified with calculations in accordance with SAE J688 (see 6.3).

* 3.3.1.2 Low speed. Low speed for vehicles with a manual transmission shall be

calculated with engine operating at not less than 35 percent of recommended governed speed, and

shall provide a vehicle speed of not more than 7.2 km/h (4.5 mph).

* 3.3.1.3 Maximum geared speed. The maximum geared speed at engine governed speed shall be not less than 93 km/h (58 mph). Conformance to geared speed specified shall be determined by calculations made in accordance with the following formula:

Maximum geared speed (km/h) = Governed speed (rpm) X 1.609 Total gear reduction x tire factor (see 6.3).

3.3.2 Service brakes. The service brakes shall control and hold the vehicle, when loaded to its specified GVW, on a 30 percent grade. The service brakes shall stop the vehicle, loaded to specified GVW, within the stopping distance requirements of Federal Motor Carrier Safety Regulation 393.52.

3.4 Chassis components.

3.4.1 Engine. The engine furnished shall be the chassis manufacturer's standard or optional engine for the commercial model truck which meets or exceeds the requirements of this specification.