6-6
Rosco Maximizer 3B Asphalt Distributor
Operation
3-Way Valve
The 3-Way Valve has three positions depending on the
mode selected. The positions can be determined by
looking at the corner welds on the socket below the
assembly, (
).
Position 1:
Shown in
Off
Spray
Reverse Suction
Clean-out
Position 2:
The bottom actuator will move and the
socket will move to the shown position. Used in
three modes:
Bar Circulate
Transfer
Unload
Position 3:
To achieve this position the top actuator
moves. Used in two modes:
Load
Tank Circulate
3. Continue to set the Mode of Operation through each
setting and verify that each valve moves into position
(see
Valve Status During Operational Modes
6. Set the Front/Rear control to the REAR position.
Use the Manual Pump Speed dial (
)
on the Rear Controller to operate the hydrostatic
motor and asphalt pump in the forward and reverse
directions. The center position,
(0 on the dial),
will
stop the pump. Visually verify that the pump turns in
both directions.
NOTE: There is no material in the tank so be careful not
to operate pump for more than 15 minutes.
Automatic Valve System
A functional check of the automatic valve system will
verify that the air actuators and cylinders are operating
properly. Review the plumbing circuit and familiarize
yourself with the valve locations.
1.
Set the engine speed at 1500 RPM to provide
adequate power to the air system.
2. Push Mode Selection Button 1 - Spray Bar Circulate
). Have a person at the back of the
Maximizer verify that the circuit valves move into
position.
Tank Valve
The Tank Valve has two positions, open or closed.
Refer to Modes Of Operation, later in this section for
further diagrams.
2-Way Valve
The 2-Way Valve also has two positions, open or closed.
You can tell which position is being used by the position
of the directional stem on top of the valve.
shows the positions as viewed from the rear of the unit.
1
2
2-Way Valve Positions
Figure 6-2
1 - Closed Position
2 - Open Position
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