Opel 1900 1973 Service Manual page 49

DESCRIPTION 4ND OPERATION':
Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R e g u l a t o r
DIAGNOSIS: (Not Available):
MAINTENANCE AND ADJUSTMENTS:
Alternator Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulator Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAJOR REPAIR:
Alternator Removal
Alternator Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternator
Alternator Installation . . . . . 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS:
Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulator . . . . . 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DESCRIPTION AND OPERATION
ALTERNATOR DESCRIPTION
all 1973 models.
Figure lD-1 Alternator Installed
M A N U A L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The alternating current generator (alternator) is a
continuous-output (even at idle), diode rectified gen-
erator. See Figure lD-1.
The rotor, which carries the field winding, is
mounted in ball bearings at both ends. Each bearing
has a sealed-in grease supply which eliminates the
need for periodic lubrication. Two brushes and two
slip rings are used. One brush conducts the current
provided by the voltage regulator to one end of the
field coil; the other brush conducts the current from
the other end of the rotating field coil to ground.
The three phase stator windings are assembled on the
inside of a laminated core that forms the center sec-
tion of the alternator frame. Nine rectifier diodes are
connected to the stator windings (three to each phase
lead). The diodes change the alternator AC voltages
to DC voltage coming out of the B positive and the
D positive terminals of the alternator.
If the alternator will not meet output specifications
when supplied with full field current, the
must be overhauled. If the voltage regulator does not
limit maximum voltage within specifications, adjust
the voltage regulator. If steady voltage regulation,
within specifications, cannot be achieved, the voltage
regulator assembly must be replaced.
Page No.
1 D-28
1 D-29
1 D-29
1 D-29
1 D-30
1 D-34
1 D-35
1 D-35
assembly