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)

Foot control, suspended or treadle type

Air control valves

(e)

(f)

Air pressure gage, visible to the driver

Low-air-pressure warning, visible and audible

(g)

(h)

Service brake stop lamp switch

Automatic moisture ejector

(i)

Automatic slack adjusters on cam type brakes or internal self-adjusting brakes on

wedge and disc type brakes.

* 3.4.11.1.1 Air dryer. A replaceable cartridge desiccant type air dryer shall be installed in the air brake system. The dryer shall have the capability of removing not less than 95 percent of the moisture in the air being dried. The dryer shall have a pre-cooler and a filter to screen out oil

and solid contaminants. The dryer shall have an automatic self-cleaning cycle and a thermostatically controlled heater to prevent icing of the purge valve.

3.4.11.2 Trailer brake control system. When a trailer towing package is specified

(see 3.1.1.6), a trailer brake control system shall be furnished. The trailer brake control system shall include:

	(a) (b)	Identification of emergency and service lines Coincident control of trailer brakes with prime mover foot control
	(c)	Independent hand control for trailer brakes
*	(d) (e)	Prime mover protection valve with dash control and automatic breakaway feature Trailer stoplight control operable with foot brake and with hand control for trailer
	(f)	brakes Two SAE J844 coiled air hoses, not less than 2800 mm (110 inches) long when fully
		extended, with SAE J318 gladhand couplers on both ends of hoses. The hoses shall be packaged and stowed in the vehicle for shipment;
*	(g)	Air connectors for trailers with SAE J318 gladhand couplers mounted at the rear of the vehicle located to prevent interference with a trailer
*	(h) (i)	Dummy gladhand couplers with chains Prime mover only parking brake value to permit prime mover parking brakes to be
		applied while charging the trailer air brake system.

3.4.11.3 Brake control from a towing vehicle. When specified (see 6.2), the vehicle shall be furnished with a system for controlling the brakes from a towing vehicle (wrecker). The installation shall be complete with air brake couplers, relay emergency valve with no-bleed-back feature (except when spring applied emergency brake is furnished), additional air lines and fittings. The service and emergency couplers shall be mounted on the front in a protected position providing for ready attachment of air hoses from a towing vehicle. The service and emergency couplers shall be identified and provided with dummy gladhand couplers with chains.