MIL-T-2452 Trucks, Refuse Collection: Compaction Type, Rear Hopper Loading, With Tilt Cab, Diesel And Gasoline Engine Driven, 19,000 To 44,500 Pounds Gvw, 4X2 And 6X4, 10 To 25 Yard, CommercialThis specification covers diesel gasoline engine driven, 4-wheel, 2-rear wheel drive and 6-wheel, 4-rear wheel drive, commercial, compaction type, refuse collection trucks having a minimum gross vehicle weight GVW 19,000 to 44,500 pounds. The bodies shall be of 10- through 25-cubic yard minimum rated capacities with rear hopper loading. Vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in acquisition documents.

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MIL-T-2452J

3.5.4.2 Compaction cycle time. The compaction cycle time shall be not more than

45 seconds.

3.5.5 Rear dumping. The rear dump opening shall be full body width and height. The tailgate shall be hinged at the top and shall be provided with power operated means for swinging the tailgate and hopper away from the body to permit unobstructed dumping. A reinforced,

full-body cross-section, hydraulically actuated ejection plate shall completely discharge all

refuse through the rear opening of the body. The ejection plate design and construction shall operate throughout the length of the body without bypassing refuse.

3.5.6 Operating mechanisms. The mechanisms for emptying the hopper, compacting the refuse, elevating the tailgate, and discharging the refuse shall be hydraulically operated. The pump shall be a heavy duty, positive displacement type. Power to the pump shall be transmitted by a heavy duty, antifriction bearing type power takeoff through a heavy duty driveline. All mechanical operating mechanisms shall have an ultimate load capacity of not less than 2.0 times the maximum operating load.

3.5.6.1 Hydraulic system. Relief valves shall be provided in the hydraulic system to prevent excessive hydraulic pressure and shall be set to relieve hydraulic pressures in excess of that recommended by the manufacturer. A hydraulic T-fitting, or equivalent, for insertion of a pressure gage shall be provided in the line beyond the main relief valve to facilitate checking the line pressure. All circulating fluid shall pass through a full-flow hydraulic fluid filter. The filter element mesh shall be of a size to limit circulation of particles of 10-micronsize or larger. The filter shall be located so that it will not contribute to pump cavitation and shall be accessible for servicing. Hydraulic lines, hoses, and fittings shall meet or exceed the requirements of Recommended Practices and Standards contained in the SAE Handbook. A reservoir shall be provided with sufficient flow volume to maintain the fluid temperature below the recommended limits and shall incorporate an oil level indicator.

* 3.5.6.1.1 Hydraulic cylinders. All exposed hydraulic cylinders shall be fitted with seals to prevent entrance of dirt, moisture and other foreign elements and to prevent leakage of hydraulic fluid from the cylinders. Hydraulic ram piston rods shall be chrome-plated full length with sufficient thickness to withstand a 30-hour salt spray test in accordance with ASTM B-117. The connecting ends shall be treated in accordance with the best commercial practice.