OO-R-2853
3.10.4 Hydraulic system. The hydraulic system shall be complete with all
operating accessories, including pumps, reservoir, hydraulic cylinders, valves,
pressure relief valves, filters, hoses, piping, and fittings. A wiper shall be
provided on all cylinders adjacent to the piston rod seal to prevent dirt and
abrasives from damaging the seal or entering the cylinders. The hydraulic
system shall be equipped with a full flow, 10 micrometer (minimum) oil filter
accessible for cleaning. Vents shall be equipped with filter elements to
prevent dirt from entering the reservoir with the air. The suction pickup shall
be above the reservoir bottom. The return line shall terminate below the
minimum oil level of the reservoir. The drain plug shall be located at the
lowest point in the tank and shall be of the magnetic type. All high-pressure
hydraulic hoses and fittings shall be capable of withstanding a bursting test
pressure of not less than four times the working pressure, and a maximum
operating pressure no less than two times the working pressure. Hydraulic oil
shall be of the noncorrosive type, with characteristics to withstand any system
temperature created by the machine operating in any ambient temperature range
between -20 and +120 degrees Fahrenheit (°F) (-29 to +49 degrees Celsius (°C)).
3.11 Power transmission system. The roller shall be diesel-engine-driven,
with a full hydrostatic or combination hydrostatic and mechanical drive system,
which will provide an operational range meeting requirements as described
throughout this specification.
3.11.1 Engine. The roller shall be powered by a diesel engine having
horsepower, torque, and speed characteristics to meet all roller performance
requirements specified herein. The diesel engine shall operate in any ambient
temperature from -20 to +120°F (-29 to +49°C). The engine shall be ready for
full load operation in less than 15 minutes. When an ether priming system is
furnished, it shall be of the measured shot type with storage capacity of not
less than 12 fluid ounces (355 milliliters (mL). The engine shall have an
exhaust system with muffler. The roller shall be furnished with the following
accessories as a minimum:
Manufacturer's standard instrument panel design, which may be of
a.
visual or electronic audio/visual indicators for high coolant
temperature, low engine lube oil pressure, restricted hydraulic
filtering system, and failure of battery charging system.
b.
Fuel tank with capacity for not less than 8 hours operation. Fuel
level indicator or gage.
Frequency meter.
c.
d.
Key operated ignition switch.
Two-stage air cleaner with flow restriction indicator, mounted
e.
visible to the operator.
f.
Battery charging system of not less than 35 amperes capacity.
Corrosion-resistant battery mounting location.
g.
When specified (see 6.2), battery(s) shall be dry charged in
h.
accordance with W-B-131. When dry charged battery(s) are required,
manufacturer may furnish roller with activated battery(s) installed
for convenience, and dry charged replacement battery(s) will be
packaged and shipped with roller for installation at its final
destination.
Operator's selective, speed, directional and control devices.
i.
Hour meter with totalizing mechanism of not less than 9999 hours.
j.
Safety shutdown device, when two-cycle engine is furnished.
k.
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