OO-C-2821
reverse, first speed gears, and control carrier engine speed. such controls
shall not interfere with the operation of the conventional carrier controls.
These controls shall have been proven in actual service. The contractor shall
make available descriptive literature, full information on, and evidence of
prior use of the controls, upon request of the contracting officer.
3.7.7.10 Lighting and associated electrical system. The lighting system for
the crane upperstructure shall be 12 or 24 volts (V). A heavy-duty alternator
with a 65 ampere minimum rating shall be provided.
3.7.10.1 Floodlights. Two detachable floodlights shall be installed near
the front and top of-the cab, one on each side of the hoist line, and located in
a position so that the lenses cannot be seen by the operator during normal
operations. The floodlights shall be secured in brackets, capable of
withstanding severe shock and vibration, and permit horizontal and vertical
movement of the light beam and positive clamping of the light in any position.
The floodlights shall not extend beyond the front or sides of the cab unless
provision is made for an adjustable bracket to fold clear of the cab sides for
transport. Floodlight sealed-beam units shall be of the 50-watt floodlamp type.
3.7.10.2 Interior lighting. The upperstructure cab shall have effectively
located lighting to provide operating light, as well as adequate illumination
for access to, and exit from, the cab, without window glare reflections.
3.7.10.3 Wiring harness. The electrical cable shall be plastic insulated,
size No. 16 American Wire Gage (AWG) or larger. The harness shall be installed
in conduit. Electrical connectors of the quick-disconnect type shall be
provided. The circuits shall be color or number traced. Means to prevent
chafing of the cable when passing through structural members shall be provided.
3.7.10.4 Circuits, circuit breakers, and switches. Lights shall be
controlled by waterproof, single-pole, single throw, quick-make toggle switches
of the commercial type, with automatic reset type circuit breakers or fuses.
The switches shall be located on a panel within reach of the operator when
seated One switch and associated electrical circuit shall be provided for the
independent control of the following light combinations:
a.
Revolving upperstructure floodlights.
b.
Interior cab lights.
Instrument lights.
c.
3.7.11 Warning horn. A suitable warning horn, electrical or air-operated,
shall be mounted in a protected location on the exterior of the revolving
The horn shall be operated by a control, of good commercial
upperstructure.
quality, mounted within reach of the operator.
.
3.8 Carrier. Unless otherwise specified (see 6.2), the crane carrier shall
be the manufacturer's standard width for the capacity crane furnished. The
number of axles shall be the manufacturer's standard for the capacity crane
furnished. All axles under the revolving upperstructure shall be driven axles.
The carrier shall be capable of supporting the revolving upperstructure. In
addition, the carrier will support the specified front-end equipment with the
operational rated load placed on the crane boom as it is rotated through the
180° range. The revolving upperstructure shall be positioned on the carrier in
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