Troubleshooting; Starting Problems - Toro ProCore 648 Service Manual

Troubleshooting

Remove all jewelry,
watches, before doing any electrical trouble-
shooting or testing. Disconnect the battery
cables unless the test requires battery voltage.

Starting Problems

Problem
Starter solenoid clicks, but starter will not crank
(if solenoid clicks, problem is not in safety interlock
system).
Nothing happens when start attempt is made (traction
lever must be in neutral position for successful start).
Electrical System
CAUTION
especially rings and
For effective troubleshooting and repairs, you must
have a good understanding of the electrical circuits (see
Chapter 8 – Electrical Diagrams) and components used
on this machine.
If the machine has any interlock switches by–passed,
they must be reconnected for proper troubleshooting
and safety.
Possible Causes
Battery charge is low.
Battery cables are loose or corroded.
Battery ground to frame is loose or corroded.
Wiring at starter is faulty.
Starter solenoid is faulty.
Starter mounting bolts are loose or not supplying a
sufficient ground for solenoid.
Starter is faulty.
Traction lever is not in the neutral position.
Battery cables are loose or corroded.
Battery ground to frame is loose or corroded.
Battery is dead.
Fuse F1 (20 amp) is open.
Wiring to start circuit components is loose, corroded, or
damaged (see Chapter 8 – Electrical Diagrams).
Neutral proximity switch is out of adjustment or faulty.
Sensing plate on traction lever is loose.
Neutral switch relay is faulty.
Ignition switch is faulty.
Fuse block is faulty.
Starter solenoid is faulty.
Page 5 – 8
ProCore 648