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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 flow calibration and/or ground speed
Asphalt application rate is
too light
Ground speed is too fast
Decrease truck speed
Engine RPM is not sufficient 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
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
Insufficient 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 filter 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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Содержание Maximizer 3B
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