MIL-T-46765 Trucks, Tank: Sewage And Waste, Dump Type, 4550 And 7570 Liter 1200 And 2000 Gallon, Modified CommercialThis specification covers diesel and gasoline engine driven trucks equipped with a hydraulic lift dump tank, an auxiliary engine driven centrifugal pump, and associated hoses and equipment for loading and unloading the dump tank with sewage and waste materials. The vehicle is capable of cleaning sewers, septic tanks, catch basins, manholes, and sludge pits. The trucks have minimum gross vehicle weights GVW of 11 350 kilograms kg 25,000 pounds in a four wheel, two wheel drive 4x2, 4550 liter L 1200 gallon size; and 15 650 kg 34,500 pounds in a six wheel, four wheel drive 6x4, 7570 L 2000 gallon size; for normal rating 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-46765(AT)

the hose reel assembly and the 125 mm (5-inch) diameter pipe. The hose shall be connected at the other end to the eductor housing.

3.5.9.6 Underground suction hose. One 4570 mm (15-foot) length of 75 mm (3-inch) id suction hose with quick disconnect type cam lock couplings shall be provided.

3.5.10 Power hose reel assembly. A power hose reel assembly shall be furnished and installed on the front curbside of the tank body, and shall be so constructed that the sand suction hose shall be connected to a pivot. The sewage shall be drawn through the eductor intake opening into the sand suction hose and through the pivot joint, and discharged through a 125 mm (5-inch) diameter pipe extending along the top deck and down into the rear tank compartment. The power hose reel shall be hydraulically controlled and operated by the reel control lever to raise and lower the eductor housing assembly. There shall be a bolted-on cleanout plate located on the pivot joint for cleanout.

3.5.11 Eductor assembly. An eductor assembly shall be furnished and shall remove liquefied sewage from underground. The eductor assembly shall consist of a housing and a nozzle. The eductor housing shall be of cast iron and shall have three openings: a threaded opening for connecting the pressure pipe; an opening for connecting the sand suction hose; and an eductor intake opening. The eductor nozzle shall have a 25 mm (l-inch) diameter orifice, shall be located inside the eductor housing, and shall be replaceable. With the pump delivering

water at 620 kPa (90 psi) pressure to the eductor nozzle and with the eductor assembly at ground

level, a minimum suction rate of 95 kPa (28 inches) mercury shall be created at the eductor intake opening.

3.5.11.1 Agitator hose and tube assembly. An agitator hose and tube assembly shall be furnished and shall use water under pressure to break up solids in sewer basins enabling the eductor intake opening to draw sewage into the suction hose. The hose and tube assembly shall be rated for a water pressure of 690 kPa (100 psi). A 25 mm (l-inch) id hose, not less than

3050 mm (10 feet) long, shall be furnished and shall be fitted with 25 mm (l-inch), screw-on

high pressure fittings. One hose fitting shall connect to the 25 mm (l-inch) fitting on the pressure side of the centrifugal pump (see 3.5.8.1(d)). A 25 mm (l-inch) id tube, not less than 3050 mm (10 feet) long, shall be connected to the other high-pressure hose fitting. The tube shall be fitted on one end with a screw-on type pressure fitting and an adjustable valve.

3.5.11.2 Water suction and pressure connections. All connections and components shall be watertight and air tight to prevent loss of vacuum or pressure and shall withstand the pressure and vacuum required to meet the requirements specified herein.