Buick LeSabre 1965 Service Manual page 586

1 0 - 1 6 GENERATOR REGULATOR ELECTRICAL SYSTEMS
be thoroughly
reassembly.
c l e a n e d before
Figure 10-14—Assembling
Brush Holder and Parts
Replace a dry, worn, or rough
bearing with a new bearing which
will be prepacked with the proper
kind and amount of lubricant.
h. Brush Replacement
When the slip ring end frame
assembly is separated from the
rotor and drive end frame as-
sembly, the brushes will fall down
onto the shaft and come in contact
with the lubricant. If the brushes
are to be re-used, they must be
thoroughly cleaned with a soft
dry cloth. Also, the shaft must
The brush springs should be in-
spected for any e v i d e n c e of
damage or corrosion. If there is
any doubt as to the condition of
the brush springs, they should be
replaced.
To install new brushes, remove
the brush holder assembly fron.
the end f r a m e by detaching
the two brush holder assembly
screws. Install the springs and
brushes into the brush holder,
and insert a straight wire or pin
into the holes at the bottom of
the holder to retain the brushes.
Then attach the brush holder as-
sembly onto the end frame, noting
carefully the proper stack-up of
parts as shown in Figure 10-14.
Allow the straight wire to pro-
trude through the hole in the end
frame.
i. Heat Sink Replacement
The heat sink may be replaced by
removing the "BAT" and "GRD"
terminals from the end frame,
and the screw attaching the con-
denser lead to the heat sink. Dur-
ing reassembly, note carefully the
proper stack-up of parts as shown
in Figure 10-15.
j . Reassembly
Reassembly is the reverse of
disassembly. See Figure 10-16
for connection of internal leads.
Remember when assembling the
pulley to secure the rotor in a
vise only tight enough to permit
tightening the shaft nut to 50-60
ft. lbs. If excessive pressure is
applied against the rotor, the as-
sembly may become distorted.
To install the slip ring end frame
assembly to the rotor and drive
end frame assembly, remove the
tape over the bearing and shaft,
and make sure the shaft is per-
fectly clean.
Insert a straight wire as pre-
viously mentioned through the
holes in the brush holder and end
frame to retain the brushes in
the holder. Then withdraw the
wire a f t e r the generator has
been completely assembled. The
brushes will then drop onto the
slip rings.
1 0 - 1 6 DESCRIPTION OF
REGULATOR
The regulator assembly is made
up of a double contact voltage
regulator unit and a field relay.
See Figure 10-17. The voltage
regulator unit operates to limit
the generator voltage to a preset
BOLT
BLACK INSULATOR
BOLT
FLAT METAL WASHERS
B L A C K
"NSULATOR
LOCKWASHERS
SCREW
NUTS
LOCKWASHER
> v FLAT WASHER
FIBER INSULATOR
CONDENSER LEAD
S | N | <
END FRAME
Figure 10-15—Assembling Heat Sink and Parts