Chevrolet 10 Series 1970, Service Manual

Page: 409 / 671

ENGINE-ELECTRICAL 6Y-17
battery condition a fte r a s e rv ic e p eriod o f reasonable
length.
8. F o r an overch arged battery, lo w er voltage setting 9.
by turning one notch and then check fo r an im ­
proved battery condition a fter a s e r v ic e p erio d of
reasonable length.
If the regu lator cannot be adjusted to a value within
the sp ecified range, rep lace the regu lator.
SERVICE OPERATIONS
S e rv ic e Operations d escrib ed in the follow in g section
a re fo r the 5.5" S e rie s ID aluminum D elcotron, 6.2"
S e rie s 2D, Type 150 D elcotron and 6.6” S eries 4D,
T y p e 150 D elcotron .
W here im portant d iffe re n c e s in
testin g and/or s e r v ic e operations are encountered,
separate mention w ill be made o f the three gen erators.
GENERATOR
Pulley Replacem ent
Single Groove Pulley
1. P la c e 15/16" box wrench on retaining nut and in sert
a 5/16" alien wrench into shaft to hold shaft while
rem ovin g nut (fig . 17c).
2. R em ove washer and slide pulley fan and spacer from
shaft.
3. R e v e rs e Steps 1 and 2 to in stall, use a torque wrench
with a c ra w -fo o t adapter (instead o f box wrench) and
torque the nut to 50 ft. lbs. (fig . 18c).
Double G roove Pulley
1. P la ce a 15/16” socket (with wrench flats on the
d riv e end or use Adapter J - 21501 and a box wrench)
on retaining nut, in sert a 5/16" alien wrench through
socket and adapter into hex on shaft to hold the
shaft while rem ovin g the nut.
2. R em ove washer and slid e pulley fan and spacer from
shaft.
3. T o in stall, slid e 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.
Rem oval and Installation
1.
2
.
3.
4.
5.
6
.
Disconnect battery ground strap at battery to preven t
dam aging w irin g harnesses.
R aise and support veh icle.
Disconnect w irin g leads at D elcotron.
R em ove gen erator b race bolt and detach d riv e belt.
Support gen erator and rem o ve gen erator mount bolt
(6 .2 " D elcotron uses 2 mount bolts) and rem ove
from veh icle.
R e v e rs e rem ova l procedu re to in stall, then adjust
d rive belt.
Brush Replacement
6.2
1.
2 .
3.
4.
5.
' Delcotron
R em ove two nuts retaining the blade connectors and
rem o ve the connectors (fig . 20c). Slide the indicator
light re la y w ire fro m the term in al post.
R em ove two s c rew s retaining the capacitor and brush
holder to re a r end fra m e. Rem ove brush holder.
NOTE: Capacitor lead is connected inside the
gen erator. A llo w capacitor to rem ain with the
gen erator to avoid undue strain on the lead w ire .
Inspect brushes fo r w ear. If they a re worn halfway,
rep la ce.
Inspect brush springs fo r distortion o r
weakening. If brushes appear sa tisfa cto ry and m ove
fr e e ly in brush holder, springs may be reused.
T o install brushes, push brushes into holder and
install pin to keep the brushes in holder.
Attach brush a ssem b ly and condenser to the end
fram e with hex-head stud on the le ft side only.
TERMINAL A N D NUT
ASSEMBLY
BUSHING
BRUSH LEAD
BRUSH HOLDER G R O U N D CO NDENSER
M O U N T IN G SCREW STUD LEAD
t
-2958
F ig . 18 c—T o rq u in g P u lle y N u t Fig . 19 c— D e lc o tro n Brush H o ld e r Assem bly
SOCKET
^ ^ A D A P T E R
5/16 ALLEN
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CHEVROLET TRUCK SERVICE MANUAL