MIL-T-62097 Truck, Motor Home Shell, For Customization Into Mobile Laboratory, Electronics Van, Work Area, Etc., 14,000 Pounds Gvw, 4X2, Modified CommercialThis specification covers diesel and gasoline engine driven four-wheel, two-rear wheel drive, forward control motor home shells, having a minimum gross vehicle weight GVW of 14,000 pounds, for normal operating conditions. The vehicle has an integral drivers compartment and body for later installation of such special equipment as may be desired. Vehicles procured under this specification are commercial items which are 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

MIL-T-62097C

3.4 Chassis components.

3.4.1 Engine. The engine furnished shall be the chassis manufacturer's standard or optional engine for the commercial model vehicle which meets or exceeds the requirements of this specification.

* 3.4.1.1 Diesel engine. Unless otherwise specified, (see 3.4.1.2) the vehicle shall be equipped with a liquid cooled, compression ignition, two-stroke or four-stroke cycle diesel engine, with not less than six cylinders. Engine net horsepower ratings used in performance prediction calculations shall be determined in accordance with SAE J1349. The engine shall demonstrate the performance characteristics specified herein when using diesel fuel conforming to VV-F-800. In addition, when specified (see 6.2), the engine shall operate satisfactorily on grade JP-4 and JP-5 fuel conforming to MIL-T-5624 under emergency, short duration conditions and on grade JP-8 fuel conforming to MIL-T-83133 under normal conditions. A power loss when operating on JP-4, JP-5 or JP-8 is acceptable.

3.4.1.2 Gasoline engine. When specified (see 6.2), the vehicle shall be equipped with a liquid cooled, internal combustion, four-stroke cycle gasoline engine with not less than six cylinders. The engine furnished shall produce the required vehicle performance when operated on unleaded fuel with a research octane rating of 91, at an engine speed not more than the manufacturer's recommended operating speed. The engine shall be capable of warranted operation on unleaded fuel, when used in accordance with the operator's manual. Net horsepower ratings used in performance calculations shall be determined in accordance with SAE J1349. Unless otherwise required by foreign laws, vehicles for overseas use shall be capable of accepting and operating on leaded gasoline.

* 3.4.1.3 Oil filter. A full flow or combination full flow and bypass oil filter with replacement element shall be furnished.

3.4.1.4 Governor. An engine governor shall be furnished and set and sealed to limit the engine to the engine manufacturer's maximum recommended operating speed.

* 3.4.1.5 Cooling system. The cooling system shall maintain the engine coolant at a temperature below the boiling point with the vehicle loaded to GVW and operated at an altitude of 10,000 feet above sea level or in an ambient air temperature of not less than 125 degrees Fahrenheit (°F). The cooling system shall include a surge tank or a coolant recovery reservoir of not less than two-quart capacity. For cooling system servicing, see 3.4.28.1.

* 3.4.1.6 Coolant temperature control. Thermostatic control of engine coolant temperature shall be provided. On diesel engine driven vehicles, the control shall include complete thermostatic control of all coolant flow through the radiator.