MIL-DTL-62483A(AT)
(Application for copies may be obtained from NATO, Military Agency for Standardization
(MAS), 35 Chesham Place, London SWI, England.)
2.4 Order of precedence. In the event of a conflict between the text of this document and
the references cited herein, the text of this document takes precedence. Nothing in this document,
however, supersedes applicable laws and regulations unless a specific exemption has been
obtained.
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article
inspection (see 4.1.1).
3.2 Design, materials, and manufacturing processes. Unless otherwise specified herein,
the design, materials, and manufacturing process selection is the prerogative of the contractor as
long as all articles submitted to the Government fully meet the operating, interface, support and
ownership, and operating environment requirements specified (see 4.2.2.1).
3.2.1 Construction. The engine shall be constructed in accordance with
Drawing 11664451 for M809 vehicles, and Drawing 11669328 for M939 vehicles (see 6.2).
3.2.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered,
or environmentally preferable materials should be used to the maximum extent possible provided
that the material meets or exceeds the operational and maintenance requirements, and promotes
economically advantageous life cycle costs.
3.3 Operating requirements. Each engine shall provide the following functional,
operational, and performance capabilities.
3.3.1 Production engine break-in run. A production break-in run is required. The
break-in run schedule shall be established by the contractor to assure that each engine, as offered
for delivery, is suitable for immediate vehicle drive-away operations. The manufacturer may use
oil of his own selection for the engine build up and production break-in run (see 4.2.3.1).
3.3.2 NATO standard engine test. The engine shall show no evidence of performance
degradation when tested in accordance with NATO standard AC/225 (Panel II) D/131 (Part II),
section 2-3 (see 4.2.3.2). During the tests, the engine shall require only specified maintenance.
3.3.3 Exhaust smoke density. The engine exhaust smoke number at the engine outlet
during operation at elevation up to 500 feet (ft) [152 meters (m)] and using specified fuels
shall not exceed EPA requirements throughout speed range when using Robert Bosch
model ETD 020.50 smoke meter, and sampling pump model ETD 020.00 (see 4.2.3.3).
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