MIL-T-62276 Truck Tractor: Diesel Engine Driven, 80,000 Pounds Gvw, 145,000 Pounds Gcw, 8X4, Modified CommercialThis specification covers a tilt cab, diesel engine driven, eight-wheel, four-wheel drive truck tractor having a minimum gross cehicle weight GVW of 80,000 pounds and a minimum gross combination wight GCW of 145,000 pounds, for normal operating conditions.

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MIL-T-62276C

3.4.3.1 Air cleaner. An air cleaner shall be furnished.

3.4.3.2 Fuel tank(s). The vehicle shall be equipped with fuel tank(s) of not less than

75 gallons total capacity. In addition, fuel tank capacity shall exceed 75 gallons if required to provide for not less than 200 miles operating range with the vehicle loaded to specified GCW. When more than one tank is furnished, means shall be provided to assure an equalized fuel level in both tanks.

3.4.3.3 Fuel filters. Fuel filters shall be furnished. Primary and secondary fuel filters shall be furnished when the manufacturer's standard.

* 3.4.3.4 Fuel and water separator. When specified (see 6.2), in addition to the manufacturer's standard fuel filters, a fuel and water separator shall be furnished. The separator shall include a water coalescer and a drain valve. When a separator is required, a combination filter/separator unit may be furnished.

3.4.4 Exhaust system. The exhaust system shall conform to Federal Motor Carrier Safety Regulation 393.83. The tailpipe shall be vertically mounted at the rear of the cab and shall be furnished with a heat shield and a hinged rain cap. The tailpipe shall extend approximately

12 inches above the top of the cab, but not exceeding a vehicle height of 150 inches. Unless otherwise specified (see 6.2), a spark arrester having a 80 percent arresting efficiency when rated in accordance with SAE J350 shall be furnished, except on turbocharged engines. When specified (see 6.2), a spark arrester shall be furnished on turbocharged engines to complement the spark arresting qualities of the turbocharger. Maximum exhaust system restriction, as established by the engine manufacturer, shall not be exceeded.

3.4.4.1 Pyrometer (s). The vehicle shall be provided with a pyrometer in the engine exhaust manifold. When a "V" type engine is furnished, a pyrometer shall be furnished in each exhaust manifold. When a turbocharged engine is furnished, an additional pyrometer shall be installed on the exhaust side of the turbocharger. When two or three pyrometers are furnished, the gages shall be incorporated in one housing. The gage(s) shall be mounted on the instrument panel.

3.4.5 Automatic transmission. The vehicle shall be provided with an automatic transmission. The input torque capacity of the transmission shall be at least equal to the maximum torque delivered by the engine. The transmission shall include a hydraulic torque converter and

not less than five forward gear ratios. Normal driving range selector position shall provide not less than four gear ratios without movement of the selector. The transmission shall be provided with a power takeoff opening. A transmission oil cooler system shall be provided. The transmission shall be provided with a built-in hydraulic retarder.