3-4 LeeBoy 8520C Conveyor Paver
Component Location
ScreedScreed
The screed is the last component that contacts the
paving material. Asphalt material is fed from the hopper
conveyor through the augers to the screed, where it is
heated, applied and compacted onto the paving surface.
The LeeBoy 8520C Conveyor Paver is equipped with
the Heavy Duty 815HD screed. It features heavy-duty
ight screws, heavy-duty crown and valley mechanism
and 3-Adjuster AOA (Angle of Attack) with vertical
height adjustment for even more screed control. A
9-function screed control box is located on each side of
the paver.
The main screed has hydraulic extensions on each side
that extend and retract to allow paving widths from 8 - 15
feet. Electric dual vibrators mounted on the main screed
frame increase paving material compaction. The main
screed can be locked in the raised position for travel,
service and overnight parking for additional stability.
Hydraulic SystemHydraulic System
Separate pumps for the various functions enhance
the paver’s hydraulic power. The hydraulic system
consists of a tandem drive pump, a tandem cylinder
and charge pump, and a tandem conveyor and auger
pump, along with hydraulic motors and cylinders that
work together for optimum machine component control.
Valves regulate the directional, pressure and uid ow
throughout the hydraulic system. Manifolds are set up
to allow for all options. Screed function manifolds are
mounted onto the screed. Dual 77,000 BTU oil coolers
improve reliability.
Electrical SystemElectrical System
The battery produces 12 volts DC and maintains 950
cold cranking amperes (CCA). An engine-mounted
alternator with a minimum of 100 amperes charging
capacity keeps the battery charged during normal
operation.
Heating controls provide the necessary connection and
control of the output power from the generator to the
heating elements. Each element is sized to t properly
in your screed, and provide sufcient power to heat your
screed plate to a temperature so asphalt material will
not drag or stick to the lower surface of the screed plate.
The heating control is mounted near the middle of the
main screed for ease of access to a screed operator
when a heating cycle is required.
AugersAugers
Right and left augers rotate
to move material from the
conveyors to the screed. The
auger can be controlled at
the operator platform or by
a screed operator using the
remote screed control box.
The auger can also be controlled automatically to
control pile height when the auger sonic sensor system
is installed and active. The sensor is mounted on the
screed endgates. The dual augers are hardened,
3/4-inch thick, 12-inch round, HRC 55-60 augers that
can operate in reverse. The modular auger assembly
allows for a simple quick change of the assembly if ever
needed.
Hopper and ConveyorsHopper and Conveyors
Hydraulic power raises and lowers the hopper wings.
The hopper wings can also be locked into place in
the closed position for transport. When fully open, the
hopper can hold a payload up to nine (9) tons.
Material in the hopper is moved toward the back of the
paver to the screed by conveyors. Its wide, automatic
conveyors with a wide hopper design delivers asphalt
more evenly and efciently to produce a smooth asphalt
mat.
The conveyor bed can be hydraulically raised, allowing
easy access to the paver undercarriage and tracks
for service and cleaning. Conveyor chains are easily
adjusted from the front. Heavy-duty conveyor lip and
set-screw retention of the rear shaft adds durability
and ease of service. Front conveyor sprockets
offer longer wear and better chain tracking to eliminate
material build-up.
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