Rosco Maximizer 2B - Page 137

8
Rosco Maximizer 2B Asphalt Distributor
8-5
Troubleshooting
SYMPTOM CAUSE REMEDY
Asphalt pump turns but
won’t pick up material
Air leak on suction side of asphalt
pump
Check gasket on quick coupling cap of load
inlet. No “air suction” should be heard
Check for hole in piping on the suction side of
the asphalt pump
Ensure ball valve from solvent tank and load line
vent valve are closed
Asphalt cold or too thick Heat material to the proper temperature
recommended by asphalt supplier
Tank valve is closed
Check operation of the tank valve. Free the
valve if it is stuck and air cylinder cannot pull it
open. Reversing rotation of asphalt pump may
assist valve opening.
Asphalt pump not turning in a
“forward” rotation
When viewed from the shaft end (motor end),
shaft should turn clockwise for forward. Check
that the pump moves in a forward direction
when the Controller Manual Pump Speed dial
is rotated clockwise. The pump control switch
must be in FRT FWD position.
Circulating system valves not set
correctly for the required operating
mode
Refer to Section 3, Material & Operation, to
determine correct valve positions for desired
mode. Check corresponding air solenoids to
see if they are activated.
Asphalt tank is empty Fill asphalt tank with material
Load line hose plugged / collapsed Clean hose or replace
Valve on external tank closed on
transport vehicle or remote tank.
(Occurs on Tank Loading only.)
Open tank valve
Inlet screen plugged Clean inlet screen in load line and optional inlet
box if so equipped
Asphalt pump won’t turn fast
enough
Asphalt not heated to
recommended temperature
Heat material to temperature recommended by
asphalt supplier
Sump is full of asphalt or debris Unload tank contents and clean sump by
removing plug in bottom of tank.
NOTE: Maximizer 2B controller is programmed
to not allow reverse operation while in
Tank Circulate mode of operation.
Cold asphalt clogging pump or
circulating system valves
Apply heat with portable torch to asphalt pump,
piping or valves in circulating system
Speed of hydraulic pump not
matched to needs of asphalt pump.
Truck engine too slow
Increase truck engine RPM
Malfunction of the hydraulic system
components
Check for leaks in hydraulic system hoses and
ttings. See
Table 8-5. Hydraulic System.
High system temperature See Table 8-5. Hydraulic System
Air trapped in hydraulic system
Table 8-3. Asphalt Pump (continued)
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