Troubleshooting - Toro Pro Sweep 5200 Service Manual

Troubleshooting

CAUTION
Remove all jewelry,
watches, before doing any electrical trouble-
shooting or testing. Disconnect the power har-
ness from the vehicle unless the test requires
battery voltage.
Problem
Brush rotates (but should not) when dump hopper is
raised.
Brush does not rotate.
Electrical System
especially rings and
Page 4 – 2
For effective troubleshooting and repairs, you must
have a good understanding of the electrical circuits (see
Chapter 6 – Electrical Diagrams) and components used
on this machine.
If the machine has the interlock switch by–passed, it
must be reconnected for proper troubleshooting and
safety.
Possible Causes
Hopper down proximity switch is malfunctioning or
faulty.
Brush relay is faulty.
Hopper switch or circuit wiring is faulty.
Logic diode is faulty.
Hopper is raised (brush should only rotate when
hopper is fully lowered).
Hopper down proximity switch is malfunctioning or
faulty.
Problem with power or ground from vehicle (other
sweeper functions affected as well).
Fuse (20 Amp) is faulty (other sweeper functions
affected as well).
Brush switch or circuit wiring is faulty.
Brush relay or circuit wiring is faulty.
Hopper down relay or circuit wiring is faulty.
Logic diode is faulty.
Demand solenoid valve coil (S2) or circuit wiring is
faulty.
Brush solenoid valve coil (S3) or circuit wiring is faulty.
Hydraulic problem exists (see Chapter 3 – Hydraulic
System).
Pro Sweep 5200