be maintained. When the Extension is moved farther
from the switch a lower level of material will be
maintained.
IMPORTANT! This adjustment should be made
during an actual paving run so that the
efficiency of the setting can be tested. Different
materials will require different settings of the
Extension, as there is a great variation in the
way materials move. WARNING! Do not set
extensions unless the Console Feed Switch is in
Adjusting RH Hopper Gate Height
the OFF position.
Figure 15
Schematic Side View Of Material Feed System
Figure 16
Range of Depth Feeler Switch Location
Figure 14
TO ADJUST HOPPER GATES
A hopper gate for each half of the material conveying
system regulates the depth of material moved from the
hopper to the spreader screw. The height of each gate is
adjusted separately by manual turning of the gate shaft
which operates a pinion gear to drive the rack attached to
the gate (See Figure 15).
Correct adjustment of the gates is important to good
paving. Best paving results are achieved when the
material level is approximately even with, or slightly
below the tops of the spreader screws. If material is deep
near the center of the screed and there is very little near
the ends, the gates are too high . If material is deep at
the ends of the screed and there is very little near the
center, the gates are too low. This tell-tale "material
profile" is the best way for an operator to judge the gate
settings. (See Figure 17). Usually a lower gate setting will
produce a smoother run than too high a gate setting.
Comparison Of Gate Height To Material Feed
Figure 17
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