Rosco Maximizer 3B User Manual

8-8
Rosco Maximizer 3B Asphalt Distributor
Troubleshooting
SYMPTOM CAUSE REMEDY
Spraybar doesn’t circulate
heated material
Circulating system valves may
not be set for Spray/Bar Circulate
mode
Free stuck air actuators (see Automatic Valve
System in Section 6).
Check that proper air solenoid valves
are activated, (see Valve Status During
Operational Modes in Section 6).
Cold asphalt material blocking
passages in the spraybar
Apply heat to spraybar with hot steam, air or
electrical heat tapes to loosen material
Asphalt pump not turning, or tank
valve is closed. (Pump should turn
clockwise when looking at input
shaft.)
See Asphalt Pump Troubleshooting
Plugged or restricted inlet to
asphalt pump
See Asphalt Pump Troubleshooting
Spraybar doesn’t heat
material
See Causes listed above See Remedies listed above
Spraybar won’t lift or lower Obstruction in the lifting
mechanism
Remove obstruction
Hydraulic solenoid valve not
working
Check solenoid operation
Hydraulic system relief valve set
too low
Check system pressure (should be 4350 PSI)
Electrical wiring failure Check wiring
Spraybar shuts off while
spraying
Blown fuse or circuit breaker Replace fuse or reset circuit breaker
Faulty wires; loose wiring plug on
back of instrument panel
Check wiring continuity; reconnect plugs on
panel
Low air pressure; air leak Rebuild truck air pressure; check for and x air
leaks
Vibration from rough road surface
affecting mercury switches
Mercury switches located under the shields on
the spraybar need to be readjusted
Spraybar entire section not
coming on
Control switch for that section not
activated
Activate switch on instrument panel
Solenoid air valve for that section
not coming on
Check solenoid air valve by using manual
override button. Check wiring and solenoid.
Repair or replace.
Air hose plugged, collapsed/
broken
Replace hose(s)
Asphalt feed hoses to that section
are plugged or collapsed
Clean or replace asphalt hose(s)
Spraybar sections spraying
light
Spraybar not heated properly Circulate asphalt in spraybar for several
minutes before attempting to spray
Asphalt feed hose(s) partially
plugged or collapsed
Clean or replace hose(s)
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Rosco Maximizer 3B Specifications

General

Brand	Rosco
Model	Maximizer 3B
Category	Utility Vehicle
Language	English