OO-D-2855
e.
Gage, engine coolant (if liquid cooled).
f.
Ammeter, battery charging indicator, or voltmeter.
Tachometer.
h.
Starting aid controls (see 3.17).
i.
Emergency shutdown.
Hour meter. An engine hour meter having a totalizing mechanism of
j.
not less than 9,999 hours shall be furnished to register accurately
the number of hours of engine operating time. Meter shall be of
strong rugged construction to insure continuous trouble-free
performance under the most extreme equipment operating conditions
indicated in this specification.
k.
Keyed ignition/starting switch.
1.
Fuel gage.
All instruments shall be mounted on a panel or panels located near the operating
controls and shall be visible to the operator. The instrument panel(s) shall be
furnished with illumination for night operation.
3.17.2 Storage battery(s). The manufacturer's standard commercial 12-volt
(V) potential storage battery(s) normally furnished, which have a capacity of
not less than 200 ampere hours at a 20-hour rate, shall be furnished dry charged
and moisture sealed in accordance with W-B-131, without electrolyte. When
specified (see 6.2), a wet charged battery(s) shall be furnished.
3.18 Housing. A suitable housing shall be furnished to protect the engine,
compressor, hydraulic pump, and instrument panel. Supporting members and braces
shall be furnished as required. The housing shall be sufficiently rigid to
support a 300-pound (136 kilogram) load applied to any single 1 square foot
(0.093 square meter) area on the top of the housing. The housing shall include
hinged access doors to the engine, compressor, hydraulic pump, and instrument
panel. Access doors shall be equipped with devices to hold the doors in an open
position and clamps or latches to retain the doors in the closed position.
3.19 Dust suppression system. When specified (see 6.2), dust suppression
system with not less than 30-gallon (113 L) (nominal) capacity, shall be
provided. The system shall be complete with all controls, components, and
accessories as necessary. The system shall be designed to allow water or water
with detergent to be metered into the blowing air line, mixing with the rock
cuttings and eliminating dust blowing from the hole.
3.20 Dry dust collection system.
When specified (see 6.2), the
manufacturer's standard hydraulically powered dry dust collection system shall
be provided. The system shall be complete with all controls, components, and
accessories as necessary.
3.21 Toolbox. A toolbox shall be provided to carry those tools and
accessories required to operate the rock drill. The toolbox shall have a hinged
lid and trunk drawbolt of a type that will keep the lid closed when the toolbox
is subjected to vibration. The toolbox shall be securely fastened in a
protected and accessible location.
3.22 Lifting and tiedown attachments. When specified (see 6.2), the rock
drill shall be equipped with lifting and tiedown attachments. Lifting and
tiedown attachments shall conform to type II or type III of MIL-STD-209. A
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