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1.10
BATTERY CHARGING ALTERNATOR
SYSTEM
1.10.1 Introduction
Table 1-3. Alternator and Manual
Prestolite
Alternator No.
8EM2012NA
It is recommended that the applicable manual (see
chart above) be obtained from Prestolite Electric, 7585
Empire Drive, P.O. Box 6210, Florence, Kentucky, 41042,
U.S.A., for complete overhaul and service information of
the alternator, and regulator, if required.
The mechanical construction of the alternator differs
from the d-c generator in that the field rotates and the
(armature) generating windings are stationary. The field
current necessary to control the output of the alternator
is supplied from the solid-state regulator. This integral
voltage regulator, which incorporates an IC, all silicone
semiconductor and thick-film construction, controls the
current feed to the field via the brushes and rotor slip
rings.
Two completely sealed ball bearings support the rotor
in the front and rear housing.
Prestolite
Amps
Manual No.
25-197
65
1
7
6
5
4
1.
A-C Tap
2.
Back Cover
3.
Positive Output(B+)
4.
Integral Regulator
Figure 1-8. Alternator and Regulator
Observe proper polarity when installing battery,
negative battery terminal must be grounded.
Reverse polarity will destroy the rectifier diodes
in alternator. As a precautionary measure,
disconnect positive battery terminal when
charging battery in unit. Connecting charger in
reverse will destroy the rectifier diodes in
alternator.
1-9
2
3
5.
Excite
6.
Ground
7.
12vdc Test Lamp
Terminal (D+)
CAUTION
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