3.20.1 Screed extensions. Screed extensions shall increase the paving width
increments of 6 inches from 8 feet to 16 feet. A combination screed extensions
and cutoff shoes may be used to attain increments of 6 inches. Extensions shall
be attached to screed by bolting or by quick-acting type clamps. When hydraulic-
actuated vibration is employed, screed extensions shall be provided for the
compacting unit as well as for the oscillating screed.
3.20.2 Expendable screed. In lieu of screed extensions an extendable screed
shall be acceptable. The expendable screed shall have an infinite number of
paving width settings from 8 feet to 16 feet. The expencable screed shall be an
integral part of the basic screed (see 3.16) and shall be provided with heat and
vibration. Means shall be provided to control mat thickness and crown through the
extended width up to 16 feet (see 3.16). Means shall be provided to install
cutoff shoes specified in 3.20.3.
3.20.3 Cutoff shoes. Cutoff shoes shall reduce the paving width in increments
of 6 inches from 8 feet to 6 feet.
3.20.4 Floodlamps. Six floodlamps and mounting brackets shall be installed on
the paver. Three lamps shall be mounted on each side of the paver and located to
prevent blinding of the operator, Each horizontally-opposed pair of lights shall
be protected by a circuit breaker conforming to SAE J553, type II and controlled
by a weatherproof switch. The lamps shall be directed as follows:
One pair of lamps directed into the receiving hopper and feeders.
One pair of lamps directed to illuminate the area behind the compacting
One pair of lamps directed into the spreader screw area.
3.21 Electrical systems. When electrical vibration is employed, a separate
115/230-volt system shall be provided. This system shall be independent of and
completely isolated from the paver basic electrical system. Overload protective
devices shall be installed in the 115/230-volt system.
3.22 Electromagnetic interference. When specified (see 6.2), the electro-
magnetic interference emission and susceptibility characteristics of the paver
shall meet the recommended limits specified in SAE J551 when measured in
accordance with SAE J551.
3.23 Lubrication. All surfaces requiring lubrication shall be provided with a
means for lubricating.
3.23.1 Lubricants. The paver shall operate as specified herein when lubricated
with military lubricants (see 6.4). When specified (see 6.2), the paver shall
operate as specified herein, when lubricated as recommended by the manufacturer,
with commercial lubricants.
3.23.2 Lubrication fittings. Lubrication fittings shall conform to MIL-F-3541,
type I, II, or III. Fittings shall be located in a protected position and shall
be accessible to a lever-operated, hand-type grease gun conforming to MIL-G-3859