Hopper. The paving machine hopper receives
and temporarily holds the paving material from the haul
truck. The hopper wings move inward to facilitate
dumping paving material onto the conveyors and
outward to receive paving materials. Heavy rubber
flashing mounted on the hopper reduces the amount of
paving material that could spill from the hopper. The
paving machine operator controls the hopper wing
movement from the operator control console.
Auger/Conveyor System. The conveyors move
paving material from the hopper to the augers located on
the back of the tractor. The right and left auger/conveyor
systems operate independently of each other. The
paving machine operator selects manual or automatic
control of each separate auger/conveyor system. The
augers move the paving material outward from the
conveyors, distributing it evenly to the screed. Reversing
direction of the conveyors empties the hopper toward the
front of the paving machine.
Operation of the left and right auger/conveyor systems
can also be controlled from the screed crew control
auger/conveyor system, and the right control box
controls the right auger/conveyor system.
Flow Gates. Two flow gates are mounted at the
back of the hopper, one on either side. Each can be
independently raised or lowered from the operator
control console. The position of the flow gates controls
flow of the paving material to the augers.
Operation of the left and right flow gates can also be
controlled from the left and right screed crew control
boxes. The left control box can control only the left flow
gate, and the right control box can control only the right
The screed is towed by and receives paving material
from the tractor. As the tractor moves forward, the
screed is towed over the paving material. The screed
provides the initial compaction through vibration and lays
paving material to the desired thickness and finish.
Main Screed. The main screed provides the
structural rigidity for the screed and is attached to the
tractor by two screed tow arms. The main screed plate,
bolted to the bottom of the main screed, rides on top of
the paving mat and creates a smooth finish. The weight
and vibration of the main screed provides initial
compaction of the mat. Screed extension cylinders
mounted inside the main screed extend and retract the
extension screeds. The paving machine operator
controls the operation of the main screed from the
operator control console.