© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
Page 92
TROUBLESHOOTING
TROUBLESHOOTING CHART
PROBLEM
POSSIBLE CAUSE(S)
SOLUTION(S)
Engine overheats.
NOTE: If coolant loss has not
occurred, check for malfunction
of the temperature sending unit.
Low coolant level.
Supply coolant.
Fan blade installed incorrect
Reinstall (pusher type fan)
Clogged radiator.
Flush radiator.
Loose fan belt.
Tighten belt.
Defective thermostat.
Replace thermostat.
Nautiilus Hi-Dump® machine
moves slowly
or does not move.
Parking brake is on.
Release brake.
Directional control pedal jammed, damaged, or
not adjusted properly.
Clear jam or adjust linkage.
Tow valve in tow position
Move to drive position
Low hydraulic fl uid level.
Add hydraulic fl uid.
Hydraulic fl uid temperature too high and too
thin caused by excessive load, climbing, high
environment temperatures, worn pump, or
improper fl uid.
Use the proper weight oil for the
operation conditions; check pump.
Hayes coupler failed
Replace
Other problems with the hydraulics system:
pump failure, motor failure, relief valve leaking
or stuck open.
See Hydraulics System
Problems in this section.
Tow Valve improperly set.
Turn to correct position.