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)

3.5.13.5 Velocity valves. A secondary hydraulic system shall be provided with velocity valves to prevent the tank body or hose reel from collapsing if a hydraulic line should rupture.

3.5.13.6 Hydraulic hose reel brake system. A hydraulic hose reel brake system shall be furnished and shall actuate upon demand of the operator. The brake shall be of sufficient

capacity and size to permit lowering or raising the eductor assembly to any depth that is required.

The hydraulic brake shall have built-in devices to prevent any slippage.

3.5.13.7 Hydrau1ic control levers. Control levers for the hydraulically operated devices shall be furnished, shall be accessible to the operator from the curb side of the vehicle while the operator is standing on the ground, and shall be adjacent to the operators work area. The control levers shall be panel mounted, identified as to their function, waterproof, and installed in a manner to facilitate removal and service.

3.5.13.8 Hydraulic pressure lines and fittings. All hydraulic pressure lines shall be steel hydraulic tubing, black pipe, or wire braid hoses with permanently attached fittings. All fittings with threads shall have dry seal fits. Sizes of all hydraulic lines shall conform to the rate of flow and pressure required to operate the hydraulic system smoothly, quietly, and efficiently.

3.5.13.9 Hydrau1ic circuit valve enclosure. Hydraulic valves shall be enclosed with a

16 gage (1.519 mm) (0.0598 inch) steel, waterproof vented enclosure, and shall be installed in a manner to facilitate removal and servicing of the hydraulic circuit.

3.5.14 Cabinet. A cabinet shall be provided on one side of the vehicle. The cabinet shall be of a full-flanged, flush-type construction to carry at least the loads imposed and of a size to house the fresh water tank, sewage tank tools, fittings, and sanitary cleaning supplies. Door(s) shall be top hung and equipped with piano hinges having noncorrosive pins. Hinges shall be bolted to cabinet door(s). Door(s) shall have countersunk locking handles and two point locking mechanism keyed alike. The cabinet shall be constructed of not less than 16 gage (1.516 mm) (0.0598 inch) hot-rolled mild steel. Door(s) shall be constructed to prevent vibration. The

cabinet shall be storm proof and shall include provisions for flushing and draining.

3.5.15 Lights. In addition to lighting specified in 3.4.2.3, the following lighting and wiring requirements shall be provided:

(a) A light in the cabinet

(b) Two sealed beam floodlights, mounted in swivel type holders with weatherproof switches, conforming to SAE J598. One floodlight shall be mounted on the left top side at the rear of the truck, and one on the curbside at the forward end of the tank. Both lights shall be accessible from the ground;