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)

* 3.4.4 Exhaust system. The exhaust system shall conform to Federal Motor Carrier Safety Regulation 393.83. Vertical exhaust mufflers, capable of being reached easily by personnel entering or leaving either side of the cab, shall be furnished with a heat shield. Vertical exhaust systems shall be provided with a hinged rain cap.

3.4.5 Transmission. Unless otherwise specified (see 3.4.5.2), a manually shifted transmission shall be provided on the vehicle. Input torque capacity of the transmission shall be at least equal to the maximum torque delivered by the engine. The vehicle shall be provided with not less than the number of forward speeds specified in table V. When more than five forward speeds are required, a multispeed transmission, auxiliary transmission or two-speed axles shall be provided. Gear ratios in transmissions and axles shall be matched to provide a progressive shifting pattern throughout the complete range, and shall provide required vehicle performance (see 3.3.1). The transmission shall provide for maximum ease of shifting in all speeds. The transmission shall be provided with SAE J704 power takeoff openings at right and left sides.

Table V. Transmission requirements, minimum number of forward speeds.

* 3.4.5.1 Clutch. The clutch shall be the largest capacity clutch offered for the size vehicle and engine furnished with clutch torque capacity exceeding maximum delivered engine torque. The clutch lining shall be asbestos free. The clutch on size 2000 vehicle shall have spring dampening and a greaseable bearing.

* 3.4.5.2 Automatic transmission. When specified (see 6.2), an automatic transmission shall be furnished. The transmission shall include a hydraulic torque convertor and not less than four forward gear ratios. Normal driving range selector position shall provide not less than four forward gear ratios without movement of the selector. The transmission shall have a power takeoff opening.

3.4.5.3 Power takeoff. The power takeoff shall be of a rated capacity to operate powered equipment. Controls to operate the power takeoff shall be located in the truck cab accessible to the seated driver. A caution plate or decal reading "DO NOT OPERATE VEHICLE AT HIGHWAY SPEEDS WITH POWER TAKEOFF ENGAGED" shall be provided and installed so as to be readily visible to the seated driver.