MIL-PRF-52109H
3.5.4 Identification marking. Each pumping assembly shall have data plate(s)
permanently attached in a place where the data will be visible and legible but not interfere with
operation and maintenance. The data plate(s) shall include at a minimum: specification number,
design activity code, manufacturer and CAGE, part number, contract number, date of
manufacture, item nomenclature, serial number, national stock number (NSN), weight, technical
manual number, and US military property identification. The plates shall be constructed of a
durable, weather resistant material.
3.5.5 Cleaning, treatment and painting. Unless otherwise specified (see 6.2), all external
surfaces of the pumping assembly, except as noted below, regardless of material selected, shall
have a finish coat of Coating, Water Dispersible Aliphatic Polyurethane, Chemical Agent
Resistant (Waterborne CARC) paint IAW MIL-DTL-64159. The color shall be Desert Tan
686A, # 33446 of FED-STD-595. All informational marking and lettering shall be flat black,
and caution marking(s) in accordance with ANSI Z 535.2.
a. The color of all other surfaces, to include those within housing, those behind insulation
material, and the insulation retainer, if used, shall be Desert Tan 686A, # 33446, or
Black, # 37030 of FED-STD-595, or the manufacturer standard color if approved by the
government.
b. The following items shall not be painted: terminal wiring connections, governor
linkage, instruction diagrams, and plates, rectifiers, relays, switches, circuit interrupters,
instrumentation, rubber, lubrication fittings, hoses, nozzles, dry break couplings and all
other parts whose operation or function would be adversely affected by paint. Insulation
material shall be painted unless the sound absorbing characteristics of the material are
compromised.
c. Identification plates shall be installed following application of the final finish coat.
d. CARC paint shall not be applied to surfaces that may exceed temperatures of 400 F.
Any external surface that reaches a temperature of 400 F during operation shall be
coated with a high temperature resistant paint.
3.5.6 Maintainability.
3.5.6.1 Maintenance ratio. The pumping assembly shall have a maintenance ratio of not
greater than 0.06, except Type II, Size 1, Class 1 (EMD) that shall not be greater than 0.05.
Maintenance ratio is defined as the ratio of the total active maintenance person-hours required
(scheduled and unscheduled) to the total operating time. Man-hours for repair of replaced
components, and scheduled before-and-after-operation checks (PMCS) are excluded. A
maintenance schedule shall be established prior to start of any testing.
3.5.6.2 Ease of maintenance. All major assemblies shall be accessible for repair,
replacement, and adjustment without the removal of other major assemblies. Covers, plates, and
mounting brackets that must be removed for component adjustment, repair, or replacement shall
be equipped with quick-disconnect fasteners. Drain outlets shall be located for accessibility.
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