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|  Lights shall be protected with a wire mesh screen having openings of not more
than 1/2 inch (12.7 mm) manufactured from number 11 gage wire (2.30 mm) or
larger. The operating panel shall be lighted. Floodlights and panel lights
shall be incorporated into one wiring circuit.
3.10.2 Batteries. Unless otherwise specified (see 6 .2), one set of batteries
shall furnish the power for all electrical demands. The batteries shall be
shipped dry charged. When specified a maintenance free battery or wet charge
battery shall be furnished.
3.10.3 Battery cables. Battery cables between the battery and starting
motors shall conform to the SAE recommended practice for heavy-duty service.
The positive terminal shall be labeled with a "+" in red and the negative
terminal shall be labeled with a "-" in black. The terminals shall be insulated
to prevent accidental high current short.
3.10.4 Battery box. A weatherproof battery box made of fiberglass, plastic
material or steel not less than 0.0747 inch (1.89738 mm) nominal thickness shall
be provided for the batteries. Vents shall be provided near the top of the
battery box, and drains shall be provided in the bottom. The box shall be
equipped with built-in restraints constructed so that pressure will be applied
to the outer battery case only. When the batteries are installed in the box
with all electrical connections completed and when the battery-box lid is in the
closed position, there shall be no uninsulated electrical conductor within 1
inch of any point within the battery box at which an electrical potential
exist. The battery box shall be located so that the battery will be easily
accessible for routine maintenance, removal, and replacement. The battery
electrolyte level shall be visible when the battery filler caps are removed.
The batteries shall be accessible for servicing with battery-servicing aids,
such as hydrometer and a syringe. Grommets shall be provided to protect the
battery lead cables. All interior surfaces of the box shall be treated with
acid resistant paint. The battery box shall be provided with a pictorial wiring
diagram showing proper battery connections and is visible with the battery-box
lid in the open position.
3.11 Propulsion system. The propulsion system shall be capable of propelling
the mixer at infinitely variable speeds from O through 2.3 mph (3.7 Kmph)
minimum working speed with a minimum travel speed of 12 mph (19.3K mph).
Direction of travel shall be controlled through a single lever. The propulsion
system shall provide dynamic braking as well as motive power. The propulsion
system shall be equipped with filters, coolers, and pressure relief bypasses as
recommended by the component manufacturer for applications of this type. The
drive system shall be independent of all other systems.
3.12 Rotor. The rotor assembly shall be mounted on dust proof, anti-friction
bearings. The rotor shall be driven through a bevel gear and torque tube
arrangement or by power transmission chains or hydraulically with or without a
gear reduction assembly. The rotor speed and forward travel speed shall be
independently variable. All gears and chains shall be enclosed. Provisions
shall be made to prevent damage to any part of the rotor, or the rotor drive
train, if one or more of the tines strikes an obstruction.
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