MIL-T-62357 Trailers, Tank: Potable Water And General Purpose, 500 Gallon, Two And Four-Wheel, Modified CommercialThis specification covers 500 gallon capacity, two-wheel and four-wheel wagon type tank trailers for hauling and dispensing liquids see 6.1 and 6.3. Vehicles procured under this specification are commercial items which are warranted by the manufacturer as specified in procurement documents.

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MIL-T-62357A

capable of accepting a 100 psi air pressure test for at least 5 minutes without leakage.  The fitting gasket shall be capable of service in minus 20oF to plus 180oF without evidence of deformation or change in dimensions.  Gaskets on type I trailers shall conform to 3.1.1.4.

3.9.6  Pump.  An engine driven, self-priming centrifugal pump shall be provided.  Pump materials shall be corrosion resistant.  The suction intake and pressure discharge ports of the pump shall be not less than 1.500 inches in diameter.  A check valve shall be provided in the

pump.  A line strainer shall be furnished at the suction port of the pump.  The line strainer shall be capable of removing any contamination, dirt and debris that would interfere with the pump operation.  Drains in the system shall be provided to allow drainage of liquid(s) from the complete system.  An instruction plate for the pump, the engine and the plumbing system operations shall be provided and shall be secured on the inside cabinet door.

3.9.7  Pump performance.  The pump shall be capable of loading and unloading the tank body with liquid.  The pump shall be capable of lifting the specified liquid(s) from 15 feet below ground level through the length of 1.500 inch hose specified in table III into the suction port of the pump. The rate of flow under these conditions shall be not less than the suction flow rate specified in table III.  The pump shall be capable of discharging the specified liquid(s) from the tank, against the discharge head specified in table III, at the discharge flow rate specified in

table III.

TABLE III.  Pump performance requirements.

*    3.9.8  Engine.  An air cooled, four cycle, diesel engine shall be provided to drive the pump. The engine shall have a manual cranking system.  The engine and pump shall be mounted to a common bedplate and shall be secured to the vehicle so as to minimize vibration.  The engine shall have sufficient output power to drive the pump.  During normal operating conditions, the continuous duty horsepower output required by the engine shall not exceed 75 percent of the full throttle rating of the engine.

3.9.9  Radio interference suppression.  The trailer shall be suppressed to limit electromagnetic radiation in accordance with SAE J551.

3.9.10  Engine control panel.  An engine accelerator, and key-operated start/stop switch shall be installed on a control panel in a weather and waterproof cabinet.  Each control shall be identified as to function.  The cabinet shall be furnished with a side hinged door and a spring loaded latch with a hasp for a 1-inch padlock.

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