4-36 LeeBoy 8515E Conveyor Paver
Operation
TopconTopcon®® Sonic Grade Control Sonic Grade Control
Sonic sensors continuously measure the elevation over
the surface, automatically averaging and adjusting the
tow point cylinder on the paver. If equipped with this
option, use the TopCon switch on the main control panel
to turn the sonic grade control ON or OFF as needed.
(Figure 4-73)
Figure 4-73. Sonic Grade
Control
Topcon® sonic grade
control offers paving pro-
fessionals screed control
for improving smoothness
precisely maintaining mat
thickness as you pave.
Most states require this
technology for state road
paving jobs to ensure
continuity on roadways.
Tunnel ExtensionTunnel Extension
The tunnel extensions attach to the rear of the paver.
(Figure 4-74) This attachment allows material to ow
while paving at wide widths.
Tunnel
Extension
Figure 4-74. Tunnel Extension
To attach the tunnel extension:
1. Loosen the wing bolt on extension.
2. Remove the tube cover.
3. Slide tunnel extension into the tube.
4. Tighten the wing bolt.
Slope MeterSlope Meter
The slope meter is attached to the screed (beside the
crown adjuster lever). The slope meter is used for
slope and crown road construction, and continuously
indicates the slope of the ground, or “percent of grade.”
(Figure 4-75)
Indicator Ball
Figure 4-75. Slope Meter
The slope meter is calibrated to read from 0 - 12 percent
and works similar to a level tool. Just like a level tool,
it contains a ball bearing suspended in oil that gravity
always keeps at the lowest point of the meter, indicating
the slope as you pave. Fluid in the vial is heavy and
helps keep the indicator ball steady even with vibration,
yet it still reacts quick enough to keep you accurate.
While the slope meter is sturdy and functions regardless
of weather conditions, take care not to break the glass
tube. Keep the slope meter clean for optimum viewing
at a glance.
If you selected the slope meter option when your
ordered your paver, it is already mounted onto the
screed at our manufacturing facility. Otherwise, you will
need to mount the slope meter onto the screed.
NOTE: The slope meter is a precision instrument
and must be installed correctly for accurate read-
ings. Install the slope meter onto the metal block
(if equipped), or a solid, straight, at area on the
main screed frame that will not twist or strain during
operation. It cannot be emphasized enough that the
paver needs to be on level ground for correct instal-
lation and operation.
To install the slope meter:
1. Park the paver on a level surface. Use a level tool to
determine that the paver is level before installing.
2. Align top edge of the slope meter with the mount
plate located on the screed. Use a level to ensure it
is perfectly level.
NOTE: If your machine is not equipped with a slope
meter mount, contact your authorized LeeBoy
dealer.
3. Reinstall the two bolts securely, ensuring the raised
rims are in their original position.
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