Cub Cadet 7360SS, Service Manual

Page: 78 / 170

77
2.Alternator
2.1.Inspection before removal
The correct diagnosis of the charging system
requires a careful inspection with the alternator
on the engine to determine whether or not it is
necessary to remove the alternator from the
engine for further inspection. The following
chart, in which two troubles are listed with four
possible causes of each, will help locate
the cause of the trouble:
Voltage regulator setting too high
Ground return circuit defective
Wiring incorrect
Series resistor or winding open-circuited
Alternator drive belt loose
Voltage regulator setting too low
Alternator output low
Brushes worn
2.2.Precautions for removal
Following is a list of basic precautions that
should always be observed for removal:
(1)When installing the battery, care must be
used to make sure the negative (-) termi-
nal is grounded.
(2)Do not use a megger (an instrument for
high resistance of electrical materials).
(3)Disconnect the battery cables before
charging the battery.
(4)Do not attempt to disconnect the lead from
the B terminal of the alternator when the
engine is running.
(5)Battery voltage is being applied to the B
terminal of the alternator. Do not ground it.
(6)Do not short or ground the terminal of
the alternator with a built-in IC regulator.
(7)Do not blow a spray from the steam
cleaner nozzle at the alternator.
2.3.Testing voltage setting
(1)Connect the alternator to a 12 volt battery
with an ammeter, a voltmeter and a
switch as shown in the illustration.
Alternator gives no charge
Alternator charge too high