1.12.8. Screed Vibrators. Screed vibrators are located
on the main screed and left and right extension screeds.
The vibrators are eccentric weighted shafts driven by
hydraulic motors. Rotation of the eccentric shaft causes
the screed to vibrate. The vibrator motors are turned on
and off at the operator switch panel. When the switch is
placed up, "AUTO" position, the vibrators run only when
the paving machine is travelling forward. An adjustable
flow control is used to adjust vibration frequency. The
vibrators are used to compact the paving material
passing underneath the screed plates.
1.12.9. Relay and Circuit Breaker Panel. A relay and
circuit breaker panel is located inside the operator
control panel. The relay and breaker panel is equipped
with four relays and ten circuit breakers. Two relays turn
separate voltages on and off to the neutral start and
engine induction heater relays located on the voltage
transformer panel. The other two relays control
auger/conveyor drives. There are seven manual reset
circuit breakers and three breakers that automatically
reset 10 seconds after an overload condition is removed.