26
OPERA
TION
decrease below the recommended nozzle flow rating.
When this occurs, the fan droops causing incomplete
overlapping, heavy edges and streaking.
When the end of the shot is reached, turn the “Spray
Bar” switch “off” or down. The 4-way valve is auto-
matically returned to the “Circulate in Bar” position
when the spray bar is turned off.
During the periods between shots, material should
be circulated in the spray bar to keep the bar warm and
prevent material set up in the bar. However, material
should not be circulated in the bar when travelling from
location to location. If you want to shut the distributor
down at the end of the day or between shots, you must
suck back the system. Refer to the suck back portion of
this manual for instructions.
CAUTION
Do not run the pump above rated capacity of
400 GPM. Damage to equipment may occur.
Setting the Digital Memory Presets
Setting the digital memory presets is not required to
spray. The memory buttons offer the operator a conve-
circulate some hot material through the bar. This al-
lows the bar to warm up and also extends the life of the
bar seals and o-rings.
Prior to setting the “Rotary Actuator” to the “Circu-
late in Bar” position, decrease the asphalt pump flow
rate to a maximum of 160 GPM, to avoid excessive
pressure in the spray bar when you are not spraying.
The circulation rate in the bar when not spraying, should
be set to 50% of the spray rate, but not greater than 160
gpm. When the desired application rate is set in the
computer, place the “Rotary Actuator” in the “Circu-
late in Bar” position and allow the material to circulate
in the bar for a few minutes to warm up the bar, valves
and nozzles. Lower the spray bar and continue to heat
to bring the spray bar up to operating temperature.
Put the truck transmission and rear axle in the proper
settings for the shot.
Start the distributor moving in the pre selected gear.
At the start line of the shot, move the “Spray Bar”
switch to the “On” position. While the distributor is
spraying, the truck speed does not have to remain con-
stant to maintain the application rate accuracy. At higher
speeds, flow rates can increase beyond the nozzle flow
rating. When this occurs, fogging will result and you
should slow down. At lower speeds, the flow rate may
Figure 8. Valve Positions for Spraying Through the Spray Bar.
Suck Back
Off
Hand
Spray
Hand Spray Valve Positions
4 Way Valve
Circulate in Bar
Suction Valve
Open
Suck Back
Valve
Closed
Handspray
Valve
Off
Transfer Valve
Closed
Suckback
Control Cylinder
Closed
Hand Spray
Valve
Closed
Transfer Line
Suck Back
Valve
Closed
Return Valve
Open
Flush Valve
Closed
Butterfly Valve
Cylinder Extended
Butterfly Valve
Open
Summary of Contents for Black-Topper Shooter II
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