MIL-DTL-62483A(AT)
d. Oil consumption: 0.007 lb (0.003 kg ) per observed bhp hour maximum at full
load throughout the speed range of the engine.
4.2.3.6 Thermostat. During engine tests, verify that the thermostat provided remains
closed, restricting coolant flow until minimum operating temperature of the engine as specified by
the manufacturer has been reached and that the thermostat is fully open at 210°F (99°C) measured
at the coolant outlet. Failure to maintain the specified flow rate shall constitute failure of the test.
4.2.3.7 Engine lubrication system. The engine shall operate without damage during all
testing at the specified temperature ranges. During tests specified with each of the specified oils,
the oil pressure shall not fall below the minimum specified by the manufacturer. During tests
specified with each of the oils specified, with oil level at the lowest marked safe operating level on
the dipstick and with engine running at 600 +10 rpm, the oil pressure shall not fall below the
minimum specified by the manufacturer. Verification of a satisfactory lubrication system shall be
determined during tear down inspections following engine tests, and will be evidenced by a lack of
excessive wear or damaged wear surfaces.
4.2.3.8 Air cleaner. Verify that the air cleaner is of a size and type proper for the engine
requirements and that the air cleaner shall have an efficiency equal to the engine manufacturer's
best commercial system and adequate capacity to hold and remove contaminants.
4.2.3.9 Accessories and equipment. Verify that the electrical accessories and equipment
are mechanically operable during and subsequent to submersion and that the manufacturer has a
certification of file attesting to waterproofness.
4.2.3.9.1 Alternator system. Verify that the alternator system delivers 28 Vdc at 60 A.
With the engine mounted on a dynamometer and operating at 600 rpm, the alternator output shall
not be less than 18A. Output below the specified values shall constitute failure of the test.
4.2.3.9.2 Starter system. Verify that the manufacturer has a certificate on file attesting
that the starter system is in accordance with MS53011-1 or equivalent (see 4.2.1) and conforms
to the performance requirements.
4.2.3.9.3 Air compressor. With the engine mounted on an engine dynamometer and
operating at the following specified engine speeds, the air compressor shall deliver the following
minimum air flows at a pressure of 125 pounds per square inch gage (psig). Air flow performance
shall be measured as specified in the ASME PTC-9. Failure to maintain the specified air flow rate
shall constitute failure of the test.
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