MIL-PRF-53051B
3.5.11 Identification marking. Each pumping assembly shall be identified on plates attached to
the pumping assembly by metal fasteners in a place where the plate will be visible and legible but
not interfere with the operation and maintenance of the pumping assembly. The pumping
assembly shall be identified by the National Stock Number and the manufacturer's name and part
number. The plate(s) shall be constructed of a durable material and shall be permanently attached
with fasteners. Unless a separate transportation data plate is provided, the identification plate
shall also include, as a minimum, the unit cubage and weight.
3.5.12 Cleaning, treatment and painting. All external surfaces of the pumping assembly
normally painted, except those that reach a temperature of 400 °F, shall have a chemical agent
resistant coating that withstands the use of common cleaners. Any external surface that reaches a
temperature of 400 °F during operation shall be coated with a high temperature paint. Unless
otherwise specified (see 6.2), color shall be camouflage green, color no. 34094 of FED-STD-595,
for type I, size 1 and type II, size 1; and tan, color no. 33446 of FED-STD-595, for type I, size 2
and type II, size 2. All informational marking and lettering shall be flat black and caution marking
in accordance with ANSI Z 535.2. Internal components may be finished with the manufacturer's
standard commercial paint and color, plating or treatment.
3.6 Human Factors.
3.6.1 Safety. All shafts or rotating parts shall be guarded when such parts are exposed to
contact by personnel or otherwise create a hazard. All hot surfaces of the equipment, including
exhaust components exposed to contact by personnel or that create a fire hazard, shall be fully
guarded or insulated. Hot surfaces shall not be positioned near material that is flammable or that
could be melted. The fuel fill port shall be located to allow refueling without the need to open any
panels or doors. Fuel tanks shall be positioned to prevent spills or overflows from running onto
the engine, exhaust, or electrical components. Exhaust or discharges from the equipment shall be
directed away from the operator's position. Electrical equipment shall be effectively guarded and
grounded to prevent electrical hazards.
3.6.2 Noise limits. Steady-state noise produced by the pumping assemblies shall not exceed 90
dB(A) as measured in accordance with 4.5.13. If noise levels are between 85 and 90 dB(A) , or if
procedures for noise suppression have been pursued and documented to the satisfaction of the
procuring activity and written permission to exceed the 90 dB(A) limit is obtained, hazard signs as
specified by the procuring activity shall be prominently displayed on the equipment.
3.6.2.1 Noise suppression methods. Any method of noise suppression may be used as long as
all components used by the operator are easily accessible without the use of any tools. The
throttle control assembly shall be accessible without causing the pump assembly to exceed the
required noise level while operating at full load. An enclosure shall be used as a last resort to
noise suppression; it shall be easily removable, for required field maintenance, and shall include
external provisions for carrying the pumping assembly. If the pumping assembly is enclosed,
adequate ventilation shall be provided so that the temperature inside the enclosure does not
exceed 150 °F. Any noise reducing insulation used shall be non-flammable, non-combustible,
shall not absorb fuel and oil and shall be vermin proof.
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