MIL-P-17574D(YD)
Suitable connector (plug, jack, or terminal) for extension cord type
h.
portable lighting system to be furnished when auxiliary lighting is
specified (see 3.10.3).
Suitably located incandescent bulbs for indirect lighting of
i.
instrument panel.
3.9.6 Engine hour meter. An engine hour meter indicating total operation
time shall be provided which registers up to 9,999.9 hours in 0.1 hour
increments.
3.10 Pump components and accessories.
3.10.1 Pressure gage.
A compound gage reading from O to 30 inches of
mercury vacuum and O to 150 pound-force per square inch gage (psig) shall be
furnished for the pump intake. A pressure gage in a range of O to 200 psig
shall be furnished for the pump discharge. Both gages shall be furnished with
pulsation dampeners and gage clocks. Dials shall have a minimum nominal
diameter of not less than 2-1/2 inches. Gages shall be of the Bourdon-type and
shall conform to the requirements of ASME B 40.1.
3.10.1.1 Gage savers. Gage savers shall be provided on the lines connecting
the pressure gages and safety switches to the pump to protect then from damage
caused by freezing. The device or devices used for pressure-dampening, liquid
barriers, and the isolated liquid between the barriers and the gages shall
assure satisfactory operation of the instruments under all operating conditions
of the pump.
3.10.2 Auxiliary priming system. Unless otherwise specified (see 6,2), a
dual system, auxiliary priming system shall be furnished. One component of the
system shall be a commercially available hand pump capable of filling the
centrifugal pump and suction line with primer liquid. The other component shall
be a manually-controlled exhaust ejector, or a manually-controlled suction
device engine to prime the pump. Automatic means, by float or otherwise, shall
be provided to prevent entrance of liquid into the intake manifold during primer
operation. Means shall be provided for isolating the components from the
centrifugal pump and for draining each component of the system so that drainage
goes back into the volute or other areas after operation. A readily visible
brass or copper plate securely fastened in the vicinity of each of the two
priming devices shall outline (step-by-step) the operating procedure for each.
The plate shall include a warning against running the engine to accomplish
priming of a dry pump by use of the ejector or vacuum system except for
repriming purposes in which the residual liquid of the volute can act as a
lubricant. When an ejector primer is furnished, the instructions shall specify
that the ejector shall not be operated longer than 2 minutes at a time, and that
the system shall be dismantled and cleaned after each 200 hours of engine
operation. Instructions shall indicate how to completely isolate the ejector
system when flammable liquids are pumped.
3.10.3 Auxiliary lighting. When specified (see 6.2), an auxiliary lighting
system for night operation shall be provided. The system shall consist of two
separate units consisting of bulb, lens-enclosed reflector, spring-actuated
clamp or magnetic clamp for reflector, 20-foot extension cord with jack plug,
or terminal leads for connection on instrument panel. The cord shall be in
accordance with NFPA 70, type SO, for use in damp places, and comprised of
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