1-9
1.10 BATTERY CHARGING ALTERNATOR
SYSTEM
1.10.1 Introduction
Table 1-3. Alternator and Manual
Prestolite
Prestolite
Amps
Alternator No.
Manual No.
8EM2012NA
25-197
65
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.
1
2
3
4
5
6
7
1. A-C Tap
2. Back Cover
3. Positive Output(B+)
4. Integral Regulator
5. Excite
6. Ground
7. 12vdc Test Lamp
Terminal (D+)
Figure 1-8. Alternator and Regulator
CAUTION
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.
