MIL-T-62497 Truck, Refuse Collection: Compaction Type, One-Person Operation, Automated Side-Loading, 20 Yard, Dual Right And Left Hand Drive, Diesel Engine Driven, 32,000 Pounds Gvw, 4X2, With Tilt Cab, CommercialThis specification covers a diesel engine driven, four-wheel, two wheel-drive, tilt cab, commercial, one-person operation refuse collection truck. The truck shall have dual right and left hand drive and a minimum gross vehicle weight GVW of 32,000 pounds. The minimum compaction volume of the body, excluding the hopper, shall be 20 cubic yards, and shall be side-loading and rear dumping. Vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in procurement documents.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22

MIL-T-62497

3.3 Performance.

3.3.1 Speeds and gradeability. High and low speed requirements shall be met with the vehicle load to the specified GVW.

3.3.1.1 High speed gradeability. The vehicle shall be capable of ascending a 1.0 percent grade 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.

3.3.1.2 Low speed. Low speed shall be calculated with the engine operating at not less than 35 percent of recommended governed speed and shall provide a vehicle speed not greater than 4 mph.

3.3.1.3 Maximum geared speed. The maximum geared speed at engine governed speed shall be not less than 58 mph. 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, loaded to required 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.

3.4.1.1 Diesel engine. The vehicle shall be equipped with a liquid cooled, compression ignition, two-stroke or four-stroke cycle diesel engine, with not less than four cylinders. Engine net horsepower used in performance prediction calculations shall be determined in accordance with SAE JB16 or SAE J1349. A fan clutch shall be provided. The fan clutch shall reduce the fan speed automatically when the fan is not required for cooling.

3.4.1.2 Oil filter. A full flow type oil filter shall be furnished.

3.4.1.3 Governor. An engine governor shall be furnished and set and sealed to limit the maximum engine speed to the engine manufacturer's maximum recommended operating speed.