Inspection Before Removing Alternator (A007Ta0171B (12V-40A), A007Ta8271A (24V-25A)); Inspecting Alternator Operation; Handling Precaution - Mitsubishi L Series Service Manual

ELECTRICAL SYSTEM

1.2 Inspection before removing alternator (A007TA0171B (12V-40A), A007TA8271A (24V-25A))

1.2.1

Inspecting alternator operation

Locate the cause of faulty charging from malfunctions
described below. Do not remove the alternator for
inspection and repair unless inspection cannot be performed
with the alternator installed on the engine.
Adjusted value of voltage regulator is high.
Overcharge
Faulty battery.
Low adjusted value of voltage relay.
Faulty alternator output.
Over dis-
Electric power consumption is extremely high.
charge
Special load is used.
Faulty wiring.
1.2.2

Handling precaution

Improper handling could cause damage or failure to the
alternator.
(1) Connect battery cables correctly. B terminal is positive
(+), and E terminal is negative (-).
(2) Do not use any high voltage tester such as megger.
(3) Do not disconnect lead wire from B terminal of the
alternator while the engine is running.
(4) Battery voltage is constantly applied to B terminal of
the alternator. Do not ground at this terminal.
(5) Do not short circuit or ground at L terminal. (For a
built-in IC regulator type)
(6) When a steam cleaner is used, do not allow the steam
directly contact the alternator.
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