Rosco Maximizer 3B User Manual

8
Rosco Maximizer 3B Asphalt Distributor
8-7
Troubleshooting
SYMPTOM CAUSE REMEDY
Hydraulic system “chatters”.
NOTE: Some clicking or
chattering noise is
natural and can be
heard at the asphalt
pump motor. The
gerotor motor and
the double link chain
coupling make some
noise.
Air in hydraulic system is causing
oil to foam. Possible causes:
1. Clogged air lter
2. Low oil level
3. Leaks in system
4. Hydraulic pump cavitation
1. Change air lter.
2. Add uid to proper level.
3. Purge air from system; check for leaks.
4. Check for restrictions to inlet ow in
hydrostatic and hydraulic pumps.
Check for restrictions to inlet ow in
hydrostatic and hydraulic pumps.
Pressure setting of hydrostatic
pump relief valve too low
Check hydrostatic pump relief pressure; should
be 4350 PSI
Tank valve closed causing asphalt
pump to cavitate
Open tank valve; tank valve may be stuck
closed and require additional force to open
Asphalt pump relief valve not
operating
Check asphalt pump relief valve; should be set
at 70 PSI
Hydraulic oil “High Temp”
indicator is ON or higher
than usual
Low hydraulic oil level Add uid to proper level
Reservoir and/or hoses covered
with asphalt
Clean with solvent
Hydraulic lter(s) plugged Replace lters
Air trapped in hydraulic system Check for leaks and/or restrictions in the
hydraulic lines
Asphalt viscosity is too thick
causing excessive hydraulic
pressures
Heat material to proper temperature
recommended by the asphalt supplier
Relief valve setting too low on
hydrostatic pump
Check hydrostatic pump relief pressure; should
be 4350 PSI. Relief is adjustable by adding
shims. Refer to pump manual.
Hydraulic cooler is dirty or plugged Clean cooler
Spraybar Lift or Extend valve is
stuck. Oil is being pumped over
relief valve.
Manually operate hydraulic valves to see if any
are activated when switches are OFF. Repair
or replace any defective valves.
Faulty temperature sender Replace sender
Short in temperature sender wiring Correct shorted wire
Table 8-6. Spraybar and Valves
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Rosco Maximizer 3B Specifications

General

Brand	Rosco
Model	Maximizer 3B
Category	Utility Vehicle
Language	English