MIL-T-46797 Truck, With High Lift Dump Mechanism: Dump, Cargo And Stake Body Types, Diesel And Gasoline Engine Driven, 24,000 Gvw, 4X2, CommercialThis specification covers diesel and gasoline engine driven, four-wheel, two-rear-wheel drive, commercial trucks with a high lift dump mechanism. The truck has a minimum gross vehicle weight GVW of 24,000 pounds for normal operating conditions. Vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in procurement documents.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36

MIL-T-46797B(AT)

(d) A fuel warmer or pre-heater shall be provided on diesel engine driven vehicles to prevent clogging of fuel filters due to wax crystallization in the fuel. The fuel warmer shall use engine coolant to transfer sufficient heat to the diesel fuel to heat it from an inlet temperature of minus 40F to an outlet temperature of plus 9°F, with

a flow rate of not less than the maximum fuel demand of the engine fuel system. A

coolant shutoff valve shall be provided at the coolant inlet side of the fuel warmer unit.

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 starting system, with 12-volt direct current (dc) lighting system, and not less than a 60 ampere alternator, shall be furnished. Engine starting equipment shall include an ether starting system or glow

plug. When specified (see 6.2), if an ether system is furnished in lieu of a glow plug, it shall be

of the measured shot type. Measured shot type ether systems shall be key operated or manually operated from the driver's compartment, shall have a reservoir of not less than 12 fluid ounces, and shall be inoperative with the engine warm.

3.4.2.2 Ignition system. For gasoline engine driven vehicles, a 12-volt dc ignition system shall be furnished. An alternator of not less than 40 amperes rated capacity, and which provides not less than 16 amperes dc output at normal engine idle speed, shall be furnished.

3.4.2.3 Lighting. All vehicles lights, reflectors, and wiring shall be as specified herein and shall conform to Federal Motor Carrier Safety Regulations 393.12, 393.19, 391.20 and

393.22 through 393.26(d). Lights and reflectors shall not be mounted on vertical surface of rub rails (unless recessed and fully protected) or mounted on vehicle bumpers.

3.4.2.4 Turn signals. Turn signal lamps shall conform to SAE J588. Operating units shall conform to SAE J589, class A, and shall be mounted on the steering column. The vehicle shall be provided with double-faced front signal units and single-faced rear signal units installed in accordance with SAE J588, except that turn signals shall not be mounted on engine compartment hood. Turn signal operating units shall have visible and audible flash indicator.

3.4.2.5 Lighting cable. When specified (see 6.2), a lighting cable, conforming to

SAE J1067, shall be furnished. The cable shall be coiled and shall be not less than 110 inches