Rosco Maximizer 2B Operation, Service & Parts Manual Download Page 113

Page: 113 / 362

Rosco Maximizer 2B Asphalt Distributor

6-47

Operation

5 Select a transmission gear and axle ratio to give the

required ground speed of 350 FPM (106 68 mpm)
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

specific gear ratio.

6 Operate the unit in the Bar Circulate Mode Use the

Manual Pump Speed dial on the Plus One Controller

to set the pump flow to 140 GPM (530 LPM) at the
specific engine RPM for operation.

7 Drive the unit over the application route in the

specific gear, axle ratio, engine RPM and travel

speed, and set the pump rate

8 Record all operating parameters on your data sheet

(

Table 6-4 . Valve Status During Operational

Modes

) for future reference

NOTE: Small variations in ground speed will not

affect the application rate As the truck speed
increases or decreases, there will be a

proportional increase or decrease in the flow

from the hydrostatic pump This will also give a

proportional change in the asphalt pump flow.

Trial Run

A trial run can be made with the unit spraying to verify
the application rate This may be required if the material
being sprayed has a viscosity that is different than that
normally sprayed
1 Measure the amount of material in the tank Read

the measuring stick in the top opening or weigh the
unit before and after the run to measure the volume
sprayed during the run This latter method requires
that you know the density or the weight per gallon of
the asphalt

2 Mark out a known distance on the spraying area

Use even numbers such as 600 or 900 feet (183 or
274 meters) to make the calculations easy Allow a
starting distance before you begin spraying so the

truck speed and pump flow stabilize.

3 Start spraying as you cross the start line Maintain

the ground speed and engine RPM at the values
recorded on the data sheet

4 Watch the pump GPM on the Run Screen readout

closely You may have to adjust the speed slightly to
compensate for the change between Bar Circulate
and Spray Use the Manual Pump Speed dial to
make the adjustment

speed FPM (mpm) scale For 12 Ft bar and 0 3 rate
setting you should read 250 FPM (76 2 mpm) below
100 GPM (378 5 LPM) and 425 FPM (129 54 mpm)
below 170 GPM (643 5 LPM)

4 Select a truck speed between 250 and 425 FPM

(72 6 and 129 5 mpm) that is appropriate for the
terrain and operating conditions

Select the pump flow rate above the selected truck

speed

For example:

Select 350 FPM /4 0 MPH (106 68mpm / 6 4008
kph) as speed

140 GPM (529 95 LPM) will be the pump setting

NOTE: Do not exceed the nozzle maximum flow, (see

Nozzle Size to Flow Rate

in Section 6): 170

GPM (643.52 LPM) is overflow for 36 #1 nozzles.

Call a Rosco factory representative for additional
help

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

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.