MIL-T-62255 Truck Tractor, Yard Type, 4 X 2, Xm878This specification covers diesel engine driven, four-wheel, two rear wheel drive truck-tractor, yard type, with a one man half cab, having a minimum gross vehicle weight rating GVWR of 43,500 pounds and a gross combination weight rating GCWR of 100,000 pounds. Vehicles under this specification shall be procured only from a manufacturer who meets the standard commercial and commercially proven component criteria. Vehicles shall be warranted by the manufacturer as specified in the 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 - 37 - 38 - 39 - 40 - 41 - 42 - 43

MIL-T-62255C(AT)

there shall not be any interference with any vehicle component that will result in chafing or failure. Wiring shall be harnessed.

3.4.2.2 Starting system. The starting system shall be a 12-volt starting system.

3.4.2.2.1 Cranking motor solenoid. The cranking motor solenoid shall be accessible for service and protected from road splash and meet the climatic requirements specified herein.

3.4.2.2.2 Cranking motor circuit. The cranking motor circuit voltage drop shall be not greater than 0.20 volts per 100 amperes of the cranking motor circuit.

3.4.2.3 Batteries. A minimum of four 12-volt batteries shall be furnished. Batteries shall be in accordance with type 6 TN of MS35000. Battery terminal lugs shall be in accordance with MS75004. The ground wire to the frame shall be bolted in lieu of welding to the vehicle frame.

3.4.2.3.1 Battery compartment. Battery compartment, tray, brackets and cover shall be furnished. Compartment shall be of sufficient structural strength for accepting the imposed loads during travel, as specified herein. The tray, brackets, compartment interior and inside of the compartment cover shall be treated and painted with acid resistant paint in accordance with

TT-C-494. Battery hold-down brackets shall be furnished. Compartment shall be vented and

interior protected from road splash. The area between the top of the battery posts and the underside of the cover shall be provided with clearance. To preclude condensation dripping on the batteries, the battery box may be tilted rearward and outward or the underside of the cover may be crowned. Compartment shall be provided with a hasp for a 1 1/2 inch padlock. For shipping purposes, cover shall be secured to preclude theft when in transit.

3.4.2.3.1.1 Battery hold down brackets. Each battery shall be provided with hold down brackets. Brackets shall enclose each battery case. Brackets shall be treated to resist corrosion from batteries. Each battery shall be placed on a heavy, thick battery blanket. When vehicle is traveling, vibration shall not cause the battery(s) to crack.

3.4.2.3.2 Alternator. An alternator shall be furnished. The alternator shall provide for

12 volt lighting and starting capabilities and provide not less than 85 ampere hour capacity. Alternator shall be grounded by bolt and to the vehicle frame.