4-28 LeeBoy 8520C Conveyor Paver
Operation
NOTE: Allow the screed (and screed extension) to
heat 15 minutes before beginning to pave.
Lower the screed two inches off the ground
while heating to prevent cold air and wind
from affecting the heating process.
To operate the electric screed heating system:
1. Start the paver and idle until the engine reaches
normal operating temperature.
2. Raise the screed plate one or two inches off the
ground.
3. Turn the electric heat control box power on. (Figure
4-56)
• Push the switch UP to select MANUAL screed
heat operation.
• Push the switch DOWN to select AUTO screed
heat operation (if equipped with the Automatic
Temperature Control option).
4. Press the Start Heat button to begin the heating
cycle. The engine will automatically go to 1900
RPMs. You can press the button again to reheat the
screed as needed.
• The HEAT ON indicator light will illuminate and
stay on as long as the element is heating the
screed. The left light illuminates when the left
screed elements are heating; the right light
illuminates when the right screed elements are
heating.
NOTE: The factory-set heat cycle is 20 minutes,
which should generate enough heat to begin
the paving process.
• While joysticks are in neutral, both sides of the
screed are heating.
• When joysticks are out of neutral, the elements
automatically cycle every two minutes from side
to side to decrease the load to half.
NOTE: If equipped with this option, the heated end-
gates work independently of the main screed
and do not cycle.
5. If the heat cycle has completed but the screed
plates still require heating, restart the cycle by
repeating Step 4.
NOTE: When the start heat button is pressed, it starts
an internal timer that controls the Auto Throt-
tle feature. This will allow the engine to auto-
matically throttle to 1900 RPMs when out of
neutral, and will go back to idle upon return to
neutral as long as the generator is not heating.
Heating the ScreedHeating the Screed
Heating the screed helps prevent hot mix from sticking
to the cold screed plate and produces a smooth, tight
mat surface. This should be performed before paving
and if the paver is idle long enough for the screed to
cool between loads.
The LeeBoy 8520C Conveyor Paver is equipped with
the Legend 815HD (heavy duty) electric heat system to
heat the screed and extensions. A belt-driven generator
provides power to the electric heat control box mounted
above the screed. (Figure 4-56) It is also pre-wired
for the heated endgates option (Page 4-46). (If not
equipped with this option, the left and right endgate
switches do not function.)
Once the heating system has been enabled, the electric
heat box will apply electrical power to the heating
elements and the heating cycle will begin. The heating
cycle is timed to optimize the heat generated at the
screed plates.
NOTE: Operating in cold temperatures may affect the
screed plate temperature slightly.
4
5
6
Figure 4-56. Electric Heat Control Box
1 - Left Endgate Switch (Option)
2 - Heat On Lights
3 - Right Endgate Switch (Option)
4 - Start Heat Button
5 - Power Switch
6 - Power Crown (Option)
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