LeeBoy 8510b, Operation & Service Manual

Page: 72 / 320

6-14 LeeBoy Model 8510B Conveyor Paver
Operation
Setting Crown or Valley
NOTE: The screed plate is a one-piece unit that is flexed
to provide the required crown setting.
1. Loosen lock down bolts (Figure 6-11,1,2) in slotted
bars before adjusting crown and valley mechanism.
2. Remove crown handle and insert into adjuster
(Figure 6-12,2) .
3. For increased positive crown push down on
adjuster.
4. For increased negative crown pull up on adjuster.
5. Use the gauge
(Figure 6-12,2) located at the center
of the screed above the standing platform. If the
needle is above the zero, you will have positive
crown. If the needle is below the zero, you will have
negative crown.
Lock Down Bolts
Figure 6-11
1 - Cross Tube Bolt
2 - Center Link Bolt
3
Crown Adjustment Location
Figure 6-12
1 - Gauge
2 - Adjuster
3 - Hex Head Bolt
6. To get exact crown or valley, measure the distance
between a flat level surface to the center bottom
portion of screed. Make adjustments with crown and
valley control.
NOTE: Maximum crown is 2 in.
Crown Settings
Figure 6-13
1 - Positive (+)
2 - Zero (0)
3 - Negative (-)
NOTE: Positive crown is when the middle of the mat
is raised to permit water to drain to each side.
Negative crown is the lowering of the center of
the screed plate. Negative crown might be used
in an alley where drainage down the center of the
alley is necessary (Figure 6-13) .
NOTE: Crown may be placed in the leading edge and/or
the trailing edge of the screed plate. Crown in the
leading edge aids material flow under the screed
plate only. Trailing edge crown puts a crown in
the mat.
Example: trailing edge crown is 0, leading edge crown is
1/8 in. With this setup, there will not be any crown placed
in the mat laid by the LeeBoy Model Paver; however,
material flow under the screed plate will be improved.
NOTE: Trailing edge crown is set at 0 when shipped
from the factory. The chain connecting the
leading and trailing edge crown control assures
that the relationship of the edges remains
constant as the trailing edge is changed to meet
job conditions.
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