6-50 Rosco Maximizer 3B Asphalt Distributor
Operation
Run Simulation Example
For this phase of manual calibration and operation,
a loaded Distributor operating in the Bar Circulate
Mode will be driven per the operator’s calculations. It is
recommended that a data sheet be kept to record the
machine performance and application information for
future reference.
1. Before starting, review and follow the Pre-Operating
Check List, (see Pre-Operating Check List in
Section 6).
NOTE: Read Modes Of Operation before proceeding,
(see Modes Of Operation in Section 6).
2. Load the tank.
3. Go to the simulation area.
4. Check that the material in the tank is at the proper
application temperature and level so that the heat
tubes are covered with at least 8 inches of material..
NOTE: Application temperatures will vary depending
on the product being used. Refer to the product
supplier’s recommendations for application
temperatures.
NOTE: Temperature affects the viscosity of the material.
If the temperature is not at the recommended
rate, the range in viscosity could affect the
accuracy of the calibration, (see Guideline
Temperatures For Liquid Asphalts in Section
4).
5. Select a transmission gear and axle ratio to give the
required ground speed of 350 FPM. Use the panel
readout to measure the speed. The best results
are obtained when the engine speed is maintained
between 1500 and 1800 RPM for a speciî›™c gear
ratio.
The following example demonstrates the use of the
Slide Rule Application Guide.
NOTE: In this example, we are using a 12-foot spraybar.
Use your correct spraybar length and make
appropriate adjustments to the calculations.
1. Go to the top scale for the Bar Length. Move the
inner sleeve to the desired application rate with the
correct bar length.
For Example:
Spraybar Length = 12 Feet
Application Rate = .3 Gal/Sq.Yd.
NOTE: For No. 1 Nozzles the recommended pump rate is
8 -14 GPM per feet bar length.
For 12 Ft bar, pump rate is 96 (12 x 8) to 168 (12 x
14) or approximately 100 - 170 GPM.
2. Go to the center scale (Pump Rate) and bracket the
pump rate from the above example (100 - 170 GPM).
3. Look directly below the pump rate scale at the truck
speed (FPM) scale. For 12 Ft bar and 0.3 rate setting
you should read 250 FPM below 100 GPM and 425
FPM below 170 GPM.
4. Select a truck speed between 250 and 425 FPM
that is appropriate for the terrain and operating
conditions.
5. Select the pump ow rate above the selected truck
speed.
For example:
Select 350 FPM (4.0 MPH) as speed.
140 GPM will be the pump setting.
NOTE: Do not exceed the nozzle maximum ow, (see
Nozzle Size to Flow Rate in Section 6): 170 GPM
is overow for 36 #1 nozzles. Call a Rosco factory
representative for additional help.
Table 6-5. Example Application Data Sheet
APPLICATION RATE
SPRAYBAR
LENGTH
NOZZLE SIZE TRUCK GEAR
TRUCK
SPEED
PUMP FLOW
0.3 GAL / SQ. YD 12 FEET 1 LOW, 2ND 350 FPM 140 GPM
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