Service O P E Ra Tio N; G E N E R A To; Pulley Replacement - Chevrolet 10 Series 1968 Service Manual

6. To adjust voltage
setting, remove pipe plug and
turn slotted adjusting button inside regulator.
NOTE: After two notches in each direction,
there is a positive stop.
7. For an undercharged battery, raise voltage setting
by turning one notch and then check for an improved
Service Operations described in the following section
are for the 5.5" Series ID aluminum Delcotron, 6.2"
Series 2D, Type 150 Delcotron and the 6.6" Series 4D,
Type 150 Delcotron. Where important differences in
testing and/or service
separate mention will be made of the three generators.
GENERATOR

Pulley Replacement

Single Groove Pulley
1. Place 15/16" box wrench on retaining nut and insert
a 5/16" alien wrench into shaft to hold shaft while
removing nut (fig. 17c).
2. Remove washer and slide pulley fan and spacer from
shaft.
3. Reverse Steps 1 and 2 to install, use a torque wrench
with a craw-foot adapter (instead of box wrench) and
torque the nut to 50 ft. lbs. (fig. 18c).
Double Groove Pulley
1. Place a 15/16" socket (with wrench flats on the
drive end or use Adapter J-21501 and a box wrench)
on retaining nut, insert a 5/16" alien wrench through
socket and adapter into hex on shaft to hold the
shaft while removing the nut.
2. Remove washer and slide pulley fan and spacer from
shaft.
3. To install, slide fan, spacer, pulley and washer on
shaft and start the nut.
4. Use the socket and adapter with a torque wrench
and tighten nut to 50 ft. lbs. torque.
Removal and Installation
1. Disconnect battery ground strap at battery to prevent
damaging wiring harnesses.
F ig . 17c—Pulley Removal
SERVICE OPERATIONS
operations are encountered,
battery condition after a service period of reasonable
length.
8. For an overcharged battery, lower voltage setting
by turning one notch and then check for an im­
proved battery condition after a service period of
reasonable length.
9. If the regulator cannot be adjusted to a value within
the specified range, replace the regulator.
2. Raise and support vehicle.
3. Disconnect wiring leads at Delcotron.
4. Remove generator brace bolt and detach drive belt.
5. Support generator and remove generator mount bolt
(6.2" Delcotron uses 2 mount bolts) and remove
from vehicle.
6. Reverse removal procedure to install, then adjust
drive belt.
Brush Replacement
6 .2 " Delcotron
1. Remove two nuts retaining the blade connectors and
remove the connectors (fig. 20c). Slide the indicator
light relay wire from the terminal post.
2. Remove two screws retaining the capacitor and brush
holder to rear end frame.
NOTE: Capacitor lead is connected inside the
generator. Allow capacitor to remain with the
generator to avoid undue strain on the lead wire.
3. Inspect brushes for wear. If they are worn halfway,
replace. Inspect brush springs for distortion or
weakening. If brushes appear satisfactory and move
freely in brush holder,
4. To install brushes, push brushes into holder and
install pin to keep the brushes in holder.
F ig . 18c—Torquing Pulley Nut
EN G IN E-E LEC TR IC AL 6 Y -1 7
.
Remove brush holder.
springs may be reused.
CHEVROLET TRUCK SERVICE MANUAL