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.

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MIL-T-62255C(AT)

3.4.1.3.4 Air induction system. An engine air induction system shall be furnished and installed from the air cleaner to the engine intake. Air cleaner indicator shall be provided that is visible to the driver. Means shall be provided to preclude water entering the air system. When the air cleaner is stacked and is above the vehicle cab, a means shall be provided to either lower or swing the assembly down to enable the vehicle to enter buildings or for transport or storage. The air cleaner shall be designed to preclude the entrance of blowing snow.

3.4.1.3.5 Governor. Engine governor shall be furnished and set and sealed to limit engine to engine manufacturer's maximum recommended operating speed. Governor foot throttle control linkage shall be adjusted to permit the full range of the engine governed speed. The accelerator controls system shall conform to Federal Motor Vehicle Safety Standard 124.

3.4.1.3.6 Engine starting. Engine starting equipment shall include an ether or glow plug starting system. The ether starting system shall be of the automatic, ignition, or engine temperature limited type, controlled from the driver's area and be inoperable with the engine operating. When glow plugs are furnished in lieu of the ether starting system, they shall be provided for each cylinder. Engine starting equipment shall start the engine in an ambient temperature of minus 25°F. Appropriate type of lubrication for the ambient temperature that the vehicle is operating shall be provided.

3.4.1.3.7 Power plant heaters. Power plant heaters shall be provided for the coolant, engine oil and the batteries. Heaters shall operate on 110-volt ac, and shall be wired through a junction block to a single three pronged male, weatherproof, slave receptacle for receiving external power and grounding the vehicle. A three wire connecting cable, 25 feet long and of adequate line capacity to supply power for all heater units simultaneously, shall be furnished. Connecting

cable shall include a matching female connector at the vehicle end and a standard, three pronged

(two power plus one ground) male connector at the other end. Electrical apparatus shall conform to Federal Motor Carrier Safety Regulation 393.77(c)(7). Electrical insulation, of 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 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: