Troubleshooting - Toro Groundsmaster 455-D Service Manual

Troubleshooting

Alternator
Problem
Alternator is not charging.
Output low or irregular.
Battery voltage too high.
Alternator noisy.
Engine
Possible Causes
Alternator belt loose.
Charging circuit defective.
Energizing circuit defective.
Brushes worn or seized.
Rotor winding defective.
Stator winding defective.
Regulator defective.
Alternator belt loose.
Charging circuit defective.
Energizing circuit defective.
Brushes worn or seized.
Rotor winding defective.
Stator winding defective.
Regulator defective.
Rotor partially short-circuited.
Stator partially short-circuited.
Rectifier diode defective.
Rectifier diode short-circuited.
In­line diode defective.
Regulator defective.
Poor connections.
Rectifier diode short-circuited.
Belt worn.
Alternator mounting loose.
Alternator pulley loose.
Worn bearings.
Page 3 - 18 Rev. B
Groundsmaster 455-D