26
OPERA
TION
WARNING
To prevent possible burns from hot asphalt
spray: Do not stand, or allow anyone to stand,
where accidental opening of a valve may
cause contact with hot asphalt.
Spray bar nozzles have a limited flow range at which
optimal performance will be achieved. Flow rates
greater than this optimal range will cause excessive
fogging. Rates that are too low will cause the fan to
sag and cause heavy edges. Refer to the nozzle selec-
tion chart in the operator’s manual to select the nozzles
appropriate for your conditions.
Adjusting the Spray Bar Nozzle Angle
Adjust the nozzles to obtain an angle of approxi-
mately 30 degrees with the spraybar centerline. Every
nozzle should be at the same angle. A nozzle adjust-
ment wrench is supplied with each new unit.
Figure 6. Adjusting the Spray Bar Nozzles
Figure 7. Adjusting the Spray Bar Height.
Adjusting the Spray Bar Height
Lower the spraybar and adjust the down stops so that
the nozzles are approximately 12” above the road, on
the main bar with both wings folded, when the tank is
empty. At this height, the spray fans from the nozzles
will overlap to provide triple lap coverage of material
on the ground. This is the normal spraying height. Lower
the wings and adjust them with the cylinder nuts to fol-
low the crown of the road. The spray bar should be at an
angle of 100 to 105 degrees with the surface of the road
when viewed across the road. This slight rearward tra-
jectory compensates for the forward movement of the
distributor to evenly coat the front and back sides of
projections on the road surface.
Spraying through the Bar
Before spraying, place the valves in position for spray-
ing.
At the Rear Panel
a. Put the “Pump Control” switch in the “Front” po-
sition.
b. Put the “Suction Valve” in the “open” position.
c. Turn the “Master Power” switch “on”.
If the distributor is equipped with a gang spray bar
a. Change the display to “Bar Ft.” using the “Change
Display” button.
b. Toggle the “Application Rate” switch to obtain the
desired bar width.
c. Adjust the spray bar valves to the same width se-
lected in the cab, using the flip levers on each nozzle
valve. Disengage the flip lever from the buss bar pin to
deactivate the nozzle.
d. Press the “Change Display” switch to show the
“Application Rate” screen.
If equipped with 1 foot controls, select the desired
spray bar sections to spray by placing the appropriate
switches in the “On” or up position.. The spray bar valves
corresponding to the selected bar switches will open
when the “Spraybar” switch is turned on. Individual
switches may be turned on or off during the spray op-
eration, and the computer will adjust the pumping rate
to maintain the desired Application Rate.
Turn the “Master Power” switch “On”.
Choose the desired application rate by depressing the
appropriate “Memory” button or by toggling the “Ap-
plication rate” switch up or down to obtain the desired
application rate on the digital display. The Application
Rate may be changed while spraying simply by using
30º