Rosco Maximizer 3B User Manual

8-4
Rosco Maximizer 3B Asphalt Distributor
Troubleshooting
SYMPTOM CAUSE REMEDY
Asphalt is “fogging” during
spraying
Ground speed is too fast for
desired application rate
Decrease the ground speed
Nozzles are too small Increase the nozzle size
Asphalt viscosity is thinner than
recommended for spraying
Allow the asphalt to cool to spraying
temperature recommended by the asphalt
supplier
Asphalt pump is running too fast for
desired application rate
Adjust ow calibration and/or ground speed
calibration, (see Spraybar and Valves in
Section 8).
Asphalt application rate is
too light
Ground speed is too fast Decrease truck speed
Engine RPM is not sufcient to
maintain asphalt pump speed
Gear down and/or idle up
Plugged or restricted inlet to
asphalt pump
Clean asphalt tank sump and suction screens
Nozzles are too small for
application rate at given ground
speed
Decrease truck speed and/or use larger
nozzles
Asphalt material viscosity is too
thick, temperature is too low
Heat material to a higher temperature
More spraybar extended or
activated than used in calibration
(see Valves And Nozzles in Section 6) or
(see Manual Operation in Section 6)
Individual nozzles are clogged Clean nozzles
Table 8-3. Asphalt Pump
SYMPTOM CAUSE REMEDY
Asphalt pump leaks bitumen
at rotor shaft gland
Gland not properly tightened Tighten gland
Shaft packing worn Replace packing
Insufcient lubrication of pump
rotor shaft
Lubricate pump rotor shaft
Pump shaft grooved, bent or worn Replace pump shaft. Check for causes of shaft
damage: misalignment, loose mounts, packing
too tight.
Asphalt pump does not turn PTO not engaged; hydrostatic
pump not turning
Engage PTO
Hydrostatic pump failure With PTO engaged and low engine idle, check
charge pressure of hydrostatic pump; should
be at least 220 PSI.
NOTE: A plugged charge lter can cause low
charge pressure.
Asphalt not heated to
recommended temperature for
spraying
Heat material to temperature recommended by
asphalt supplier
Table 8-2. Asphalt Application (continued)
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Rosco Maximizer 3B Specifications

General

Brand	Rosco
Model	Maximizer 3B
Category	Utility Vehicle
Language	English