Service Procedures - Pontiac FIREBIRD 1972 Service Manual

ENGINE ELECTRICAL
NOISY GENERATOR
Noise from a generator may be caused by a loose drive fective diode, out-of-round or rough slip rings, hardened
pulley, loose mounting bolts, worn or dirty bearings, de- brushes or defective stator.
SERVICE PROCEDURES
PERIODIC SERVICE
The generator does not require periodic lubrication. The
rotor shaft is mounted on ball bearings at the drive end
and roller bearings at the slip ring end, and each contains
a permanent grease supply. At periodic intervals, check
mounting bolts for tightness and belt for proper align-
ment, wear and tension.
CAUTION: When adjusting belt tension, apply
pressure at center of generator, never against
either end frame (See Section 6A).
CHECK I N CAR
GENERATOR
Fig. 6E-28 Charging Circuit
-
SI System
JUNCTION
LAMP
GENERATOR
REGULATOR
Fig. 6E-29 Charging Circuit
-
10 ON System
SI GENERATOR
A basic wiring diagram showing lead connections is
shown in Figures 6E-28 and 6E-29. To avoid damage to
the electrical equipment, always observe the following
precautions:
Do not polarize theCgenerator.
Do not short across or ground any of the terminals
in the charging circuit except as specifically in-
structed herein.
NEVER operate the generator with the output termi-
nal open-circuited.
Make sure the generator and Energizer have the same
ground polarity.
When connecting a charger or a booster Energizer to
the vehicle Energizer, connect negative to negative
and positive to positive.
NOTE: In some circuits a voltmeter may be
used instead of an indicator lamp. In this case,
Section "A "pertaining to faulty indicator lamp
operation should be omitted from the trouble-
shooting procedure.
Trouble in the charging system will show up as one or
more of the following conditions:
A. Faulty indicator lamp operation.
B. An undercharged Energizer as evidenced by slow
cranking and low specific gravity readings.
C. An overcharged Energizer as evidenced by excessive
water usage.
REMOVE FROM'CAR (SI AND 10 DN)
1. Disconnect positive battery terminal at battery.
CAUTION: Failure to observe this step may re-
sult in an injury from hot battery lead atgener-
ator.
.
2. Remove two terminal plug and battery leads at gener-
ator.