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)

* (c)An in-line fuel warmer or preheater unit shall be provided on diesel engine driven vehicles to prevent clogging of fuel filters due to wax crystallization in the fuel. The unit shall use engine coolant to transfer sufficient heat to the diesel fuel to heat it from an inlet temperature of -40°C (-40°F) to an outlet temperature of -13°C (+9°F), with a fuel flow rate not less than the maximum fuel demand of the engine fuel system. A coolant shutoff valve shall be provided for the coolant inlet side of the fuel warmer unit. The unit shall not cause heating of the fuel above 27°C (80°F) under any possible condition.

* 3.4.1.10 Vernier throttle control. When specified (see 6.2), a manual vernier controlled throttle with quick release shall be furnished, except on electronically controlled engines.

3.4.2 Electrical system. The electrical system shall be in accordance with Federal Motor

Carrier Safety Regulations 393.27 through 393.31 and 393.33.

* 3.4.2.1 Starting system. For diesel engine driven vehicles, a 12- or 24-volt direct current (dc) starting system, with a 12-volt dc lighting system shall be furnished. Engine starting equipment shall include an ether starting system, glow plug or electric grid heater. If an ether system is furnished in lieu of a glow plug or grid heater, it shall be of the measured shot type. The measured shot type ether system shall be key operated or manually operated from the driver's compartment and shall be inoperative with the engine warm. Complete provisions for a replaceable ether reservoir of not less than 355 milliliters (mL) (12 fluid ounces) shall be furnished. A reservoir need not be furnished. When specified (see 6.2), the starting

motor shall be equipped with a thermostat controlled, automatic resetting circuit breaker that will

protect the motor from overcrank heat damage. The circuit breaker shall not limit cranking ability for a startable engine.

* 3.4.2.2 Ignition system. For gasoline engine driven vehicles, a 12-volt dc ignition system shall be furnished.

* 3.4.2.3 Alternator. Diesel engine driven vehicles shall have a minimum 65-ampere alternator. The alternator output with the engine at engine idle speed shall be not less than

45 amperes. Unless otherwise specified (see 6.2) gasoline engine driven vehicles shall have an