8
Rosco Maximizer 2B Asphalt Distributor
8-11
Troubleshooting
SYMPTOM CAUSE REMEDY
Ground speed reading
when truck isn’t moving
(Radar Horn Option).
NOTE: Ground speed
reading with the
truck not moving is
fairly common and
will not total as long
as Spraybar Master
switch is OFF or in
Bar Crclt mode.
Truck parked over/near open
water or waving grass
Move truck to a clean, dry, litter-free area of
pavement and check FPM reading
Loose piece of trash hung up on or
near the Radar Horn face
Inspect the area near the Radar Horn face and
clean as needed
Mounting bolts on bracket of Radar
Horn are loose
Tighten bolts
Radar Horn is picking up:
• PTO shaft rotation
• engine fan rotation
• engine exhaust leaks
• system vibration
NOTE: Radar Horn mountings are checked
at factory prior to shipment. All work
correctly when they leave. It may be
necessary to remount sensor at a
slightly different angle (redrill bracket) or
rotate sensor and face it towards rear of
truck at the same downward angle. The
sensor gives an absolute speed reading
so it doesn’t matter which direction it is
facing. The speed factor will have to be
recalibrated in either case, (see Manual
Operation in Section 6). Shielding the
radar horn from other interfering signal
inputs may also be effective.
Machine vibrates at front
only
Asphalt pump cavitating and
running too fast
Troubleshoot cause of pump cavitation;
decrease pump speed
Engine or driveline problems with
truck
Have truck inspected and repaired by qualiî›™ed
dealer mechanic
Set screw holding the splined
coupling on the pump shaft is
loose, allowing the coupling to
back up
Push the splined coupling back on to the pump
shaft and torque the set screw to 24 Ft/Lb and
replace locking wire
Drive shaft has been reassembled
improperly and is out of balance
Insure that the alignment arrows on the drive
shaft are in line. If not, disassemble and realign
Bolts holding the drive shaft to the
engine crankshaft are loose and
have allowed the drive shaft to
move out of alignment
Align and properly torque the drive shaft to the
engine crankshaft (Front Live Power)
Hydraulic pump mount has moved
Loosen mounting bolts. Realign the pump and
retighten the bolts
Table 8-8. General Machine (continued)
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