MIL-T-62145 Trucks: Elevating Body, Diesel And Gasoline Engine Driven, 21,000 To 39,500 Pounds Gvw, 4X2 And 6X4, CommercialThis specification covers diesel and gasoline engine driven four-wheel, two-rear-wheel drive, and six-wheel, four-rear-wheel drive vehicles having minimum gross vehicle weights GVW of 21,000 to 39,500 pounds, for normal operating conditions. The vehicles are commercial trucks equipped with stake and platform or van bodies, capable of elevating the body and cargo to a specified height for loading and unloading the cargo into and out of aircraft. The vehicles procured under this specification are commercial items which shall be warranted by the manufacturer as specified in acquisition documents.

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MIL-T-62145E

Electrical apparatus shall conform to Federal Motor Carrier Safety Regulation 393.77(c)(7). Electrical insulation of the connecting cable shall withstand normal operating stresses in low ambient air temperatures (down to minus 60 F) without cracking or loss of dielectric capacity. All heater lead wires shall be installed without interfering with the vehicle component operation, and without loose excess wire. Provisions for stowage of the cable shall be provided in the vehicle cab. Heaters shall be furnished as follows:

(a) Coolant heater, 1500-watt minimum rating, shall be installed in the engine block or lower, coolant inlet hose. An engine thermostat with an operating range of 170 F to

195 F shall be installed.

(b) Immersion type engine oil heater, 300-watt minimum rating, with 170°F to 195 F

thermostat, shall be installed in the oil pan through any convenient opening.

temperature of not less than l0°F during vehicle exposure in ambient air temperatures as low as minus 60°F, and shall embody a thermostat to limit the temperature of the electrolyte to not more than 80 F.

(d) Hydraulic fluid reservoir heater shall have a capacity to maintain the hydraulic fluid

at a temperature of not less than l0°F during vehicle exposure in an ambient temperature as low as minus 60°F, and shall embody a thermostat to limit the temperature of the hydraulic fluid to not more than 75°F.

(e) A fuel warmer or pre-heater shall be provided for diesel engines 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 40°F to an outlet temperature of plus 9 F, with a 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.

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, a glow plug or electric grid heater. If an ether starting system is furnished in lieu of a glow plug or grid heater, 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, and shall be inoperative with the engine warm. Complete provisions for an ether reservoir of not less than 12 fluid ounces shall be furnished. A reservoir need not be furnished.